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  1. MariaDB Server
  2. MDEV-22524

SIGABRT in safe_mutex_unlock with session_track_system_variables and max_relay_log_size

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    Description

      SET SESSION session_track_system_variables="*";
      		 
      SET SESSION max_relay_log_size=3*1024*1024;

      Leads to:

      10.5.2 535c284aedddb6cc3bedba4a8877b501f456991e

      		 
      Core was generated by `/test/MD180320-mariadb-10.5.2-linux-x86_64-dbg/bin/mysqld --no-defaults --core-'.
      		 
      Program terminated with signal SIGABRT, Aborted.
      		 
      #0  __pthread_kill (threadid=<optimized out>, signo=signo@entry=6)
      		 
          at ../sysdeps/unix/sysv/linux/pthread_kill.c:57
      		 
      [Current thread is 1 (Thread 0x14b24c4d9700 (LWP 42163))]
      		 
      (gdb) bt
      		 
      #0  __pthread_kill (threadid=<optimized out>, signo=signo@entry=6) at ../sysdeps/unix/sysv/linux/pthread_kill.c:57
      		 
      #1  0x0000560a84e7f7d4 in my_write_core (sig=sig@entry=6) at /data/git/10.5_dbg/mysys/stacktrace.c:518
      		 
      #2  0x0000560a84628b5f in handle_fatal_signal (sig=6) at /data/git/10.5_dbg/sql/signal_handler.cc:325
      		 
      #3  <signal handler called>
      		 
      #4  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
      		 
      #5  0x000014b24ac1d801 in __GI_abort () at abort.c:79
      		 
      #6  0x0000560a84e84e44 in safe_mutex_unlock (mp=<optimized out>, file=file@entry=0x560a85032ad0 "/data/git/10.5_dbg/sql/sys_vars.cc", line=line@entry=5335) at /data/git/10.5_dbg/mysys/thr_mutex.c:415
      		 
      #7  0x0000560a844edcf2 in inline_mysql_mutex_unlock (src_line=5335, src_file=0x560a85032ad0 "/data/git/10.5_dbg/sql/sys_vars.cc", that=<optimized out>) at /data/git/10.5_dbg/include/mysql/psi/mysql_thread.h:829
      		 
      #8  Sys_var_multi_source_ulonglong::get_master_info_ulonglong_value (this=0x560a85bd8060 <Sys_max_relay_log_size>, thd=0x14b229015088, offset=<optimized out>) at /data/git/10.5_dbg/sql/sys_vars.cc:5335
      		 
      #9  0x0000560a8450208a in Sys_var_multi_source_ulonglong::session_value_ptr (this=<optimized out>, thd=<optimized out>, base=<optimized out>) at /data/git/10.5_dbg/sql/sys_vars.ic:2381
      		 
      #10 0x0000560a84299e80 in sys_var::value_ptr (this=this@entry=0x560a85bd8060 <Sys_max_relay_log_size>, thd=thd@entry=0x14b229015088, type=SHOW_OPT_SESSION, base=0x560a84ff6410 <null_clex_str>) at /data/git/10.5_dbg/sql/set_var.cc:283
      		 
      #11 0x0000560a8441d37d in get_one_variable (thd=thd@entry=0x14b229015088, variable=variable@entry=0x14b24c4d74b0, value_type=value_type@entry=SHOW_OPT_SESSION, show_type=<optimized out>, show_type@entry=SHOW_SYS, status_var=status_var@entry=0x0, charset=charset@entry=0x14b24c4d74a0, buff=0x14b24c4d74e0 "\311C", length=0x14b24c4d74a8) at /data/git/10.5_dbg/sql/sql_show.cc:3532
      		 
      #12 0x0000560a84298027 in Session_sysvars_tracker::vars_list::store (this=this@entry=0x14b22901af20, thd=0x14b229015088, buf=0x14b24c4d7e00) at /data/git/10.5_dbg/sql/session_tracker.cc:445
      		 
      #13 0x0000560a8429885f in Session_sysvars_tracker::store (this=0x14b22901af10, thd=<optimized out>, buf=<optimized out>) at /data/git/10.5_dbg/sql/session_tracker.cc:495
      		 
      #14 0x0000560a84298d48 in Session_tracker::store (this=this@entry=0x14b22901aea8, thd=thd@entry=0x14b229015088, buf=buf@entry=0x14b24c4d7e00) at /data/git/10.5_dbg/sql/session_tracker.cc:1251
      		 
      #15 0x0000560a8428efba in net_send_ok (thd=0x14b229015088, server_status=server_status@entry=16386, statement_warn_count=statement_warn_count@entry=0, affected_rows=affected_rows@entry=0, id=id@entry=0, message=<optimized out>, message@entry=0x14b22901ab8b "", is_eof=false, skip_flush=false) at /data/git/10.5_dbg/sql/protocol.cc:282
      		 
      #16 0x0000560a8428f1e6 in Protocol::send_ok (this=0x14b229015650, server_status=16386, statement_warn_count=0, affected_rows=0, last_insert_id=0, message=0x14b22901ab8b "", skip_flush=false) at /data/git/10.5_dbg/sql/protocol.cc:643
      		 
      #17 0x0000560a8428fb71 in Protocol::end_statement (this=0x14b229015650) at /data/git/10.5_dbg/sql/protocol.cc:606
      		 
      #18 0x0000560a8437caab in dispatch_command (command=command@entry=COM_QUERY, thd=thd@entry=0x14b229015088, packet=<optimized out>, packet@entry=0x14b229067089 "SET SESSION max_relay_log_size=3*1024*1024", packet_length=<optimized out>, packet_length@entry=42, is_com_multi=is_com_multi@entry=false, is_next_command=is_next_command@entry=false) at /data/git/10.5_dbg/sql/sql_parse.cc:2430
      		 
      #19 0x0000560a84378eaf in do_command (thd=0x14b229015088) at /data/git/10.5_dbg/sql/sql_parse.cc:1358
      		 
      #20 0x0000560a844d2a09 in do_handle_one_connection (connect=<optimized out>, connect@entry=0x14b22be2b3a8, put_in_cache=put_in_cache@entry=true) at /data/git/10.5_dbg/sql/sql_connect.cc:1422
      		 
      #21 0x0000560a844d2d38 in handle_one_connection (arg=arg@entry=0x14b22be2b3a8) at /data/git/10.5_dbg/sql/sql_connect.cc:1319
      		 
      #22 0x0000560a8492fcfc in pfs_spawn_thread (arg=0x14b24a045888) at /data/git/10.5_dbg/storage/perfschema/pfs.cc:2201
      		 
      #23 0x000014b24b9006db in start_thread (arg=0x14b24c4d9700) at pthread_create.c:463
      		 
      #24 0x000014b24acfe88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

      Bug confirmed present in:
      MariaDB: 10.2.32 (dbg), 10.3.23 (dbg), 10.4.13 (dbg), 10.5.2 (dbg), 10.5.3 (dbg). Optimized builds affect too, ref comments below.

      Bug confirmed not present in:
      MariaDB: 10.1.45 (dbg), 10.1.45 (opt)
      MySQL: 5.5.62 (dbg), 5.5.62 (opt), 5.6.47 (dbg), 5.6.47 (opt), 5.7.29 (dbg), 5.7.29 (opt), 8.0.19 (dbg), 8.0.19 (opt)

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          elenst Elena Stepanova added a comment - - edited

          It's safe_mutex SIGABRT, particularly safe_mutex: Trying to unlock mutex LOCK_global_system_variables that wasn't locked at ....
          On a non-debug build, try to run something else afterwards, like show variables or show global variables. It will probably hang.

          elenst Elena Stepanova added a comment - - edited It's safe_mutex SIGABRT, particularly safe_mutex: Trying to unlock mutex LOCK_global_system_variables that wasn't locked at ... . On a non-debug build, try to run something else afterwards, like show variables or show global variables . It will probably hang.
          Roel Roel Van de Paar added a comment - - edited

          Spot on. Thank you Elena. On 10.5.3 optimized;

          10.5.3>SET SESSION session_track_system_variables="*";
          		 
          Query OK, 0 rows affected (0.000 sec)
          		 
           
          		 
          10.5.3>SET SESSION max_relay_log_size=3*1024*1024;
          		 
          Query OK, 0 rows affected (0.000 sec)
          		 
           
          		 
          10.5.3>SHOW VARIABLES;  #Hangs

          And, opening new client sessions not possible at this point.

          Roel Roel Van de Paar added a comment - - edited Spot on. Thank you Elena. On 10.5.3 optimized; 10.5.3>SET SESSION session_track_system_variables="*"; Query OK, 0 rows affected (0.000 sec)   10.5.3>SET SESSION max_relay_log_size=3*1024*1024; Query OK, 0 rows affected (0.000 sec)   10.5.3>SHOW VARIABLES; #Hangs And, opening new client sessions not possible at this point.
          Roel Roel Van de Paar added a comment -

          gdb break-in to hang;

          Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
          		 
          0x000014b6ea62cbf9 in __GI___poll (fds=fds@entry=0x7fffdb15b190, nfds=nfds@entry=2, 
              timeout=timeout@entry=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
          		 
          (gdb) set pagination off
          		 
          (gdb) thread apply all bt
          		 
           
          		 
          Thread 13 (Thread 0x14b6cbfff700 (LWP 57617)):
          		 
          #0  0x000014b6eb241f85 in futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x14b6cbffed80, expected=0, futex_word=0x14b6e9b9922c) at ../sysdeps/unix/sysv/linux/futex-internal.h:205
          		 
          #1  __pthread_cond_wait_common (abstime=0x14b6cbffed80, mutex=0x14b6e9843b10, cond=0x14b6e9b99200) at pthread_cond_wait.c:539
          		 
          #2  __pthread_cond_timedwait (cond=0x14b6e9b99200, mutex=0x14b6e9843b10, abstime=0x14b6cbffed80) at pthread_cond_wait.c:667
          		 
          #3  0x0000560be4799d76 in __gthread_cond_timedwait (__abs_timeout=0x14b6cbffed80, __mutex=<optimized out>, __cond=0x14b6e9b99200) at /usr/include/x86_64-linux-gnu/c++/7/bits/gthr-default.h:871
          		 
          #4  std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (__atime=..., __lock=..., this=0x14b6e9b99200) at /usr/include/c++/7/condition_variable:178
          		 
          #5  std::condition_variable::wait_until<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (__atime=..., __lock=..., this=0x14b6e9b99200) at /usr/include/c++/7/condition_variable:106
          		 
          #6  std::condition_variable::wait_for<long, std::ratio<1l, 1000l> > (__rtime=..., __lock=..., this=0x14b6e9b99200) at /usr/include/c++/7/condition_variable:143
          		 
          #7  tpool::thread_pool_generic::wait_for_tasks (this=this@entry=0x14b6e9843a00, lk=..., thread_data=thread_data@entry=0x14b6e9b99200) at /test/10.5_opt/tpool/tpool_generic.cc:418
          		 
          #8  0x0000560be479a300 in tpool::thread_pool_generic::get_task (this=this@entry=0x14b6e9843a00, thread_var=thread_var@entry=0x14b6e9b99200, t=t@entry=0x14b6cbffee28) at /test/10.5_opt/tpool/tpool_generic.cc:471
          		 
          #9  0x0000560be479bbad in tpool::thread_pool_generic::worker_main (this=0x14b6e9843a00, thread_var=0x14b6e9b99200) at /test/10.5_opt/tpool/tpool_generic.cc:516
          		 
          #10 0x000014b6ead646df in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
          		 
          #11 0x000014b6eb23b6db in start_thread (arg=0x14b6cbfff700) at pthread_create.c:463
          		 
          #12 0x000014b6ea63988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
          		 
           
          		 
          Thread 12 (Thread 0x14b6ca9fe700 (LWP 57616)):
          		 
          #0  0x000014b6eb241f85 in futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x14b6ca9fdd80, expected=0, futex_word=0x14b6e9b997a8) at ../sysdeps/unix/sysv/linux/futex-internal.h:205
          		 
          #1  __pthread_cond_wait_common (abstime=0x14b6ca9fdd80, mutex=0x14b6e9843b10, cond=0x14b6e9b99780) at pthread_cond_wait.c:539
          		 
          #2  __pthread_cond_timedwait (cond=0x14b6e9b99780, mutex=0x14b6e9843b10, abstime=0x14b6ca9fdd80) at pthread_cond_wait.c:667
          		 
          #3  0x0000560be4799d76 in __gthread_cond_timedwait (__abs_timeout=0x14b6ca9fdd80, __mutex=<optimized out>, __cond=0x14b6e9b99780) at /usr/include/x86_64-linux-gnu/c++/7/bits/gthr-default.h:871
          		 
          #4  std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (__atime=..., __lock=..., this=0x14b6e9b99780) at /usr/include/c++/7/condition_variable:178
          		 
          #5  std::condition_variable::wait_until<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (__atime=..., __lock=..., this=0x14b6e9b99780) at /usr/include/c++/7/condition_variable:106
          		 
          #6  std::condition_variable::wait_for<long, std::ratio<1l, 1000l> > (__rtime=..., __lock=..., this=0x14b6e9b99780) at /usr/include/c++/7/condition_variable:143
          		 
          #7  tpool::thread_pool_generic::wait_for_tasks (this=this@entry=0x14b6e9843a00, lk=..., thread_data=thread_data@entry=0x14b6e9b99780) at /test/10.5_opt/tpool/tpool_generic.cc:418
          		 
          #8  0x0000560be479a300 in tpool::thread_pool_generic::get_task (this=this@entry=0x14b6e9843a00, thread_var=thread_var@entry=0x14b6e9b99780, t=t@entry=0x14b6ca9fde28) at /test/10.5_opt/tpool/tpool_generic.cc:471
          		 
          #9  0x0000560be479bbad in tpool::thread_pool_generic::worker_main (this=0x14b6e9843a00, thread_var=0x14b6e9b99780) at /test/10.5_opt/tpool/tpool_generic.cc:516
          		 
          #10 0x000014b6ead646df in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
          		 
          #11 0x000014b6eb23b6db in start_thread (arg=0x14b6ca9fe700) at pthread_create.c:463
          		 
          #12 0x000014b6ea63988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
          		 
           
          		 
          Thread 11 (Thread 0x14b6ebdc9700 (LWP 57112)):
          		 
          #0  __lll_lock_wait () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135
          		 
          #1  0x000014b6eb23e154 in __GI___pthread_mutex_lock (mutex=0x560be536c0a0 <LOCK_global_system_variables>) at ../nptl/pthread_mutex_lock.c:133
          		 
          #2  0x0000560be3f8fa35 in inline_mysql_mutex_lock (that=that@entry=0x560be536c0a0 <LOCK_global_system_variables>, src_line=src_line@entry=1247, src_file=0x560be497cdb0 "/test/10.5_opt/sql/sql_class.cc") at /test/10.5_opt/include/mysql/psi/mysql_thread.h:765
          		 
          #3  0x0000560be3f954c4 in THD::init (this=this@entry=0x14b6cb813018) at /test/10.5_opt/sql/sql_class.cc:1247
          		 
          #4  0x0000560be3f9a729 in THD::THD (this=0x14b6cb813018, id=<optimized out>, is_wsrep_applier=<optimized out>) at /test/10.5_opt/sql/sql_class.cc:844
          		 
          #5  0x0000560be40cfe6c in CONNECT::create_thd (this=this@entry=0x14b6e9832ad8, thd=thd@entry=0x0) at /test/10.5_opt/sql/sql_connect.cc:1539
          		 
          #6  0x0000560be40cff7e in do_handle_one_connection (connect=connect@entry=0x14b6e9832ad8, put_in_cache=put_in_cache@entry=true) at /test/10.5_opt/sql/sql_connect.cc:1363
          		 
          #7  0x0000560be40d0494 in handle_one_connection (arg=arg@entry=0x14b6e9832ad8) at /test/10.5_opt/sql/sql_connect.cc:1319
          		 
          #8  0x0000560be443c5ea in pfs_spawn_thread (arg=0x14b6e984b218) at /test/10.5_opt/storage/perfschema/pfs.cc:2201
          		 
          #9  0x000014b6eb23b6db in start_thread (arg=0x14b6ebdc9700) at pthread_create.c:463
          		 
          #10 0x000014b6ea63988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
          		 
           
          		 
          Thread 10 (Thread 0x14b6ebe14700 (LWP 55695)):
          		 
          #0  __lll_lock_wait () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135
          		 
          #1  0x000014b6eb23e154 in __GI___pthread_mutex_lock (mutex=mutex@entry=0x560be536c0a0 <LOCK_global_system_variables>) at ../nptl/pthread_mutex_lock.c:133
          		 
          #2  0x0000560be3ff1d40 in inline_mysql_mutex_lock (src_file=0x560be49808c0 "/test/10.5_opt/sql/sql_plugin.cc", src_line=3054, that=<optimized out>) at /test/10.5_opt/include/mysql/psi/mysql_thread.h:765
          		 
          #3  sync_dynamic_session_variables (thd=thd@entry=0x14b6c7412018, global_lock=global_lock@entry=true) at /test/10.5_opt/sql/sql_plugin.cc:3054
          		 
          #4  0x0000560be405489d in fill_variables (thd=0x14b6c7412018, tables=0x14b6c74473e8, cond=<optimized out>) at /test/10.5_opt/sql/sql_show.cc:7778
          		 
          #5  0x0000560be40586d5 in get_schema_tables_result (join=join@entry=0x14b6c7447d68, executed_place=executed_place@entry=PROCESSED_BY_JOIN_EXEC) at /test/10.5_opt/sql/sql_show.cc:8653
          		 
          #6  0x0000560be403f26d in JOIN::exec_inner (this=this@entry=0x14b6c7447d68) at /test/10.5_opt/sql/sql_select.cc:4421
          		 
          #7  0x0000560be403f8d7 in JOIN::exec (this=this@entry=0x14b6c7447d68) at /test/10.5_opt/sql/sql_select.cc:4245
          		 
          #8  0x0000560be403dc22 in mysql_select (thd=thd@entry=0x14b6c7412018, tables=0x14b6c74473e8, fields=..., conds=0x0, og_num=<optimized out>, order=0x0, group=0x0, having=0x0, proc_param=0x0, select_options=2684619520, result=0x14b6c7447d40, unit=0x14b6c7415e68, select_lex=0x14b6c7416668) at /test/10.5_opt/sql/sql_select.cc:4669
          		 
          #9  0x0000560be403e5e1 in handle_select (thd=thd@entry=0x14b6c7412018, lex=lex@entry=0x14b6c7415da0, result=result@entry=0x14b6c7447d40, setup_tables_done_option=setup_tables_done_option@entry=0) at /test/10.5_opt/sql/sql_select.cc:417
          		 
          #10 0x0000560be3fe51c1 in execute_sqlcom_select (thd=thd@entry=0x14b6c7412018, all_tables=0x14b6c74473e8) at /test/10.5_opt/sql/sql_parse.cc:6172
          		 
          #11 0x0000560be3fe10e2 in mysql_execute_command (thd=thd@entry=0x14b6c7412018) at /test/10.5_opt/sql/sql_parse.cc:3901
          		 
          #12 0x0000560be3fe827c in mysql_parse (thd=0x14b6c7412018, rawbuf=<optimized out>, length=14, parser_state=0x14b6ebe134d0, is_com_multi=<optimized out>, is_next_command=<optimized out>) at /test/10.5_opt/sql/sql_parse.cc:7957
          		 
          #13 0x0000560be3fdd8a5 in dispatch_command (command=command@entry=COM_QUERY, thd=thd@entry=0x14b6c7412018, packet=packet@entry=0x14b6c743a019 "SHOW VARIABLES", packet_length=packet_length@entry=14, is_com_multi=is_com_multi@entry=false, is_next_command=is_next_command@entry=false) at /test/10.5_opt/sql/sql_parse.cc:1839
          		 
          #14 0x0000560be3fdbb36 in do_command (thd=0x14b6c7412018) at /test/10.5_opt/sql/sql_parse.cc:1358
          		 
          #15 0x0000560be40d02ee in do_handle_one_connection (connect=<optimized out>, connect@entry=0x14b6e98329b8, put_in_cache=put_in_cache@entry=true) at /test/10.5_opt/sql/sql_connect.cc:1422
          		 
          #16 0x0000560be40d0494 in handle_one_connection (arg=arg@entry=0x14b6e98329b8) at /test/10.5_opt/sql/sql_connect.cc:1319
          		 
          #17 0x0000560be443c5ea in pfs_spawn_thread (arg=0x14b6e984b018) at /test/10.5_opt/storage/perfschema/pfs.cc:2201
          		 
          #18 0x000014b6eb23b6db in start_thread (arg=0x14b6ebe14700) at pthread_create.c:463
          		 
          #19 0x000014b6ea63988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
          		 
           
          		 
          Thread 9 (Thread 0x14b6ebe5f700 (LWP 55693)):
          		 
          #0  0x000014b6eb2419f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x560be536eb4c <COND_slave_background+44>) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
          		 
          #1  __pthread_cond_wait_common (abstime=0x0, mutex=0x560be536bfe0 <LOCK_slave_background>, cond=0x560be536eb20 <COND_slave_background>) at pthread_cond_wait.c:502
          		 
          #2  __pthread_cond_wait (cond=0x560be536eb20 <COND_slave_background>, mutex=0x560be536bfe0 <LOCK_slave_background>) at pthread_cond_wait.c:655
          		 
          #3  0x0000560be3f376cf in inline_mysql_cond_wait (that=<optimized out>, mutex=<optimized out>, src_file=0x560be497a07d "/test/10.5_opt/sql/slave.cc", src_line=525) at /test/10.5_opt/include/mysql/psi/mysql_thread.h:1231
          		 
          #4  handle_slave_background (arg=arg@entry=0x0) at /test/10.5_opt/sql/slave.cc:525
          		 
          #5  0x0000560be443c5ea in pfs_spawn_thread (arg=0x14b6e984ae18) at /test/10.5_opt/storage/perfschema/pfs.cc:2201
          		 
          #6  0x000014b6eb23b6db in start_thread (arg=0x14b6ebe5f700) at pthread_create.c:463
          		 
          #7  0x000014b6ea63988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
          		 
           
          		 
          Thread 8 (Thread 0x14b6ebeaa700 (LWP 55692)):
          		 
          #0  0x000014b6ea55826c in __GI___sigtimedwait (set=<optimized out>, set@entry=0x14b6ebea9cf0, info=info@entry=0x14b6ebea9d70, timeout=timeout@entry=0x0) at ../sysdeps/unix/sysv/linux/sigtimedwait.c:42
          		 
          #1  0x000014b6ea5582e7 in __GI___sigwaitinfo (set=set@entry=0x14b6ebea9cf0, info=info@entry=0x14b6ebea9d70) at ../sysdeps/unix/sysv/linux/sigwaitinfo.c:25
          		 
          #2  0x0000560be3f1982b in my_sigwait (code=<synthetic pointer>, sig=0x14b6ebea9ce8, set=0x14b6ebea9cf0) at /test/10.5_opt/include/my_pthread.h:196
          		 
          #3  signal_hand (arg=arg@entry=0x0) at /test/10.5_opt/sql/mysqld.cc:3092
          		 
          #4  0x0000560be443c5ea in pfs_spawn_thread (arg=0x14b6e984a618) at /test/10.5_opt/storage/perfschema/pfs.cc:2201
          		 
          #5  0x000014b6eb23b6db in start_thread (arg=0x14b6ebeaa700) at pthread_create.c:463
          		 
          #6  0x000014b6ea63988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
          		 
           
          		 
          Thread 7 (Thread 0x14b6cabff700 (LWP 55686)):
          		 
          #0  0x000014b6eb241f85 in futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x14b6cabfed80, expected=0, futex_word=0x14b6e9b99828) at ../sysdeps/unix/sysv/linux/futex-internal.h:205
          		 
          #1  __pthread_cond_wait_common (abstime=0x14b6cabfed80, mutex=0x14b6e9843b10, cond=0x14b6e9b99800) at pthread_cond_wait.c:539
          		 
          #2  __pthread_cond_timedwait (cond=0x14b6e9b99800, mutex=0x14b6e9843b10, abstime=0x14b6cabfed80) at pthread_cond_wait.c:667
          		 
          #3  0x0000560be4799d76 in __gthread_cond_timedwait (__abs_timeout=0x14b6cabfed80, __mutex=<optimized out>, __cond=0x14b6e9b99800) at /usr/include/x86_64-linux-gnu/c++/7/bits/gthr-default.h:871
          		 
          #4  std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (__atime=..., __lock=..., this=0x14b6e9b99800) at /usr/include/c++/7/condition_variable:178
          		 
          #5  std::condition_variable::wait_until<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (__atime=..., __lock=..., this=0x14b6e9b99800) at /usr/include/c++/7/condition_variable:106
          		 
          #6  std::condition_variable::wait_for<long, std::ratio<1l, 1000l> > (__rtime=..., __lock=..., this=0x14b6e9b99800) at /usr/include/c++/7/condition_variable:143
          		 
          #7  tpool::thread_pool_generic::wait_for_tasks (this=this@entry=0x14b6e9843a00, lk=..., thread_data=thread_data@entry=0x14b6e9b99800) at /test/10.5_opt/tpool/tpool_generic.cc:418
          		 
          #8  0x0000560be479a300 in tpool::thread_pool_generic::get_task (this=this@entry=0x14b6e9843a00, thread_var=thread_var@entry=0x14b6e9b99800, t=t@entry=0x14b6cabfee28) at /test/10.5_opt/tpool/tpool_generic.cc:471
          		 
          #9  0x0000560be479bbad in tpool::thread_pool_generic::worker_main (this=0x14b6e9843a00, thread_var=0x14b6e9b99800) at /test/10.5_opt/tpool/tpool_generic.cc:516
          		 
          #10 0x000014b6ead646df in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
          		 
          #11 0x000014b6eb23b6db in start_thread (arg=0x14b6cabff700) at pthread_create.c:463
          		 
          #12 0x000014b6ea63988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
          		 
           
          		 
          Thread 6 (Thread 0x14b6cb7ff700 (LWP 55684)):
          		 
          #0  0x000014b6eb241f85 in futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x14b6cb7fed80, expected=0, futex_word=0x14b6e9b9992c) at ../sysdeps/unix/sysv/linux/futex-internal.h:205
          		 
          #1  __pthread_cond_wait_common (abstime=0x14b6cb7fed80, mutex=0x14b6e9843b10, cond=0x14b6e9b99900) at pthread_cond_wait.c:539
          		 
          #2  __pthread_cond_timedwait (cond=0x14b6e9b99900, mutex=0x14b6e9843b10, abstime=0x14b6cb7fed80) at pthread_cond_wait.c:667
          		 
          #3  0x0000560be4799d76 in __gthread_cond_timedwait (__abs_timeout=0x14b6cb7fed80, __mutex=<optimized out>, __cond=0x14b6e9b99900) at /usr/include/x86_64-linux-gnu/c++/7/bits/gthr-default.h:871
          		 
          #4  std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (__atime=..., __lock=..., this=0x14b6e9b99900) at /usr/include/c++/7/condition_variable:178
          		 
          #5  std::condition_variable::wait_until<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (__atime=..., __lock=..., this=0x14b6e9b99900) at /usr/include/c++/7/condition_variable:106
          		 
          #6  std::condition_variable::wait_for<long, std::ratio<1l, 1000l> > (__rtime=..., __lock=..., this=0x14b6e9b99900) at /usr/include/c++/7/condition_variable:143
          		 
          #7  tpool::thread_pool_generic::wait_for_tasks (this=this@entry=0x14b6e9843a00, lk=..., thread_data=thread_data@entry=0x14b6e9b99900) at /test/10.5_opt/tpool/tpool_generic.cc:418
          		 
          #8  0x0000560be479a300 in tpool::thread_pool_generic::get_task (this=this@entry=0x14b6e9843a00, thread_var=thread_var@entry=0x14b6e9b99900, t=t@entry=0x14b6cb7fee28) at /test/10.5_opt/tpool/tpool_generic.cc:471
          		 
          #9  0x0000560be479bbad in tpool::thread_pool_generic::worker_main (this=0x14b6e9843a00, thread_var=0x14b6e9b99900) at /test/10.5_opt/tpool/tpool_generic.cc:516
          		 
          #10 0x000014b6ead646df in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
          		 
          #11 0x000014b6eb23b6db in start_thread (arg=0x14b6cb7ff700) at pthread_create.c:463
          		 
          #12 0x000014b6ea63988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
          		 
           
          		 
          Thread 5 (Thread 0x14b6cc7ff700 (LWP 55681)):
          		 
          #0  0x000014b6eb241f85 in futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x14b6cc7feb80, expected=0, futex_word=0x14b6e9b55cfc) at ../sysdeps/unix/sysv/linux/futex-internal.h:205
          		 
          #1  __pthread_cond_wait_common (abstime=0x14b6cc7feb80, mutex=0x14b6e9b55ca8, cond=0x14b6e9b55cd0) at pthread_cond_wait.c:539
          		 
          #2  __pthread_cond_timedwait (cond=cond@entry=0x14b6e9b55cd0, mutex=mutex@entry=0x14b6e9b55ca8, abstime=abstime@entry=0x14b6cc7feb80) at pthread_cond_wait.c:667
          		 
          #3  0x0000560be456b6d2 in os_event::timed_wait (this=this@entry=0x14b6e9b55c98, abstime=abstime@entry=0x14b6cc7feb80) at /test/10.5_opt/storage/innobase/os/os0event.cc:275
          		 
          #4  0x0000560be456bc91 in os_event::wait_time_low (reset_sig_count=2, time_in_usec=1000000, this=0x14b6e9b55c98) at /test/10.5_opt/storage/innobase/os/os0event.cc:385
          		 
          #5  os_event_wait_time_low (event=0x14b6e9b55c98, time_in_usec=time_in_usec@entry=1000000, reset_sig_count=reset_sig_count@entry=2) at /test/10.5_opt/storage/innobase/os/os0event.cc:485
          		 
          #6  0x0000560be46ba7ab in pc_sleep_if_needed (cur_time=9488233, sig_count=2, next_loop_time=9489233) at /test/10.5_opt/storage/innobase/buf/buf0flu.cc:2552
          		 
          #7  buf_flush_page_cleaner () at /test/10.5_opt/storage/innobase/buf/buf0flu.cc:2840
          		 
          #8  0x000014b6eb23b6db in start_thread (arg=0x14b6cc7ff700) at pthread_create.c:463
          		 
          #9  0x000014b6ea63988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
          		 
           
          		 
          Thread 4 (Thread 0x14b6d77ff700 (LWP 55680)):
          		 
          #0  0x000014b6eb45363a in ?? () from /lib/x86_64-linux-gnu/libaio.so.1
          		 
          #1  0x0000560be479d6c5 in tpool::aio_linux::getevent_thread_routine (aio=0x14b6e9b52040) at /test/10.5_opt/tpool/aio_linux.cc:53
          		 
          #2  0x000014b6ead646df in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
          		 
          #3  0x000014b6eb23b6db in start_thread (arg=0x14b6d77ff700) at pthread_create.c:463
          		 
          #4  0x000014b6ea63988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
          		 
           
          		 
          Thread 3 (Thread 0x14b6e2758700 (LWP 55679)):
          		 
          #0  0x000014b6eb241f85 in futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x14b6e2757d60, expected=0, futex_word=0x560be5ba3d88 <COND_checkpoint+40>) at ../sysdeps/unix/sysv/linux/futex-internal.h:205
          		 
          #1  __pthread_cond_wait_common (abstime=0x14b6e2757d60, mutex=0x560be5ba3da0 <LOCK_checkpoint>, cond=0x560be5ba3d60 <COND_checkpoint>) at pthread_cond_wait.c:539
          		 
          #2  __pthread_cond_timedwait (cond=cond@entry=0x560be5ba3d60 <COND_checkpoint>, mutex=mutex@entry=0x560be5ba3da0 <LOCK_checkpoint>, abstime=abstime@entry=0x14b6e2757d60) at pthread_cond_wait.c:667
          		 
          #3  0x0000560be43cd449 in inline_mysql_cond_timedwait (src_file=0x560be4aebb38 "/test/10.5_opt/storage/maria/ma_servicethread.c", src_line=116, abstime=0x14b6e2757d60, mutex=0x560be5ba3da0 <LOCK_checkpoint>, that=0x560be5ba3d60 <COND_checkpoint>) at /test/10.5_opt/include/mysql/psi/mysql_thread.h:1268
          		 
          #4  my_service_thread_sleep (control=control@entry=0x560be52de3a0 <checkpoint_control>, sleep_time=sleep_time@entry=30000000000) at /test/10.5_opt/storage/maria/ma_servicethread.c:115
          		 
          #5  0x0000560be43c14f0 in ma_checkpoint_background (arg=0x1e) at /test/10.5_opt/storage/maria/ma_checkpoint.c:707
          		 
          #6  0x000014b6eb23b6db in start_thread (arg=0x14b6e2758700) at pthread_create.c:463
          		 
          #7  0x000014b6ea63988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
          		 
           
          		 
          Thread 2 (Thread 0x14b6ebee0700 (LWP 55678)):
          		 
          #0  0x000014b6eb241f85 in futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x14b6ebedfdf0, expected=0, futex_word=0x560be5c49ae8 <COND_timer+40>) at ../sysdeps/unix/sysv/linux/futex-internal.h:205
          		 
          #1  __pthread_cond_wait_common (abstime=0x14b6ebedfdf0, mutex=0x560be5c49b00 <LOCK_timer>, cond=0x560be5c49ac0 <COND_timer>) at pthread_cond_wait.c:539
          		 
          #2  __pthread_cond_timedwait (cond=cond@entry=0x560be5c49ac0 <COND_timer>, mutex=mutex@entry=0x560be5c49b00 <LOCK_timer>, abstime=abstime@entry=0x14b6ebedfdf0) at pthread_cond_wait.c:667
          		 
          #3  0x0000560be4819532 in inline_mysql_cond_timedwait (that=0x560be5c49ac0 <COND_timer>, mutex=0x560be5c49b00 <LOCK_timer>, src_file=0x560be4b5b098 "/test/10.5_opt/mysys/thr_timer.c", src_line=321, abstime=0x14b6ebedfdf0) at /test/10.5_opt/include/mysql/psi/mysql_thread.h:1268
          		 
          #4  timer_handler (arg=<optimized out>) at /test/10.5_opt/mysys/thr_timer.c:321
          		 
          #5  0x000014b6eb23b6db in start_thread (arg=0x14b6ebee0700) at pthread_create.c:463
          		 
          #6  0x000014b6ea63988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
          		 
           
          		 
          Thread 1 (Thread 0x14b6ebee17c0 (LWP 55674)):
          		 
          #0  0x000014b6ea62cbf9 in __GI___poll (fds=fds@entry=0x7fffdb15b190, nfds=nfds@entry=2, timeout=timeout@entry=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
          		 
          #1  0x000014b6ea64cc1e in __poll_chk (fds=fds@entry=0x7fffdb15b190, nfds=nfds@entry=2, timeout=timeout@entry=-1, fdslen=fdslen@entry=24) at poll_chk.c:27
          		 
          #2  0x0000560be3f22287 in poll (__timeout=-1, __nfds=2, __fds=0x7fffdb15b190) at /usr/include/x86_64-linux-gnu/bits/poll2.h:41
          		 
          #3  handle_connections_sockets () at /test/10.5_opt/sql/mysqld.cc:6267
          		 
          #4  0x0000560be3f233b8 in mysqld_main (argc=<optimized out>, argv=<optimized out>) at /test/10.5_opt/sql/mysqld.cc:5729
          		 
          #5  0x000014b6ea539b97 in __libc_start_main (main=0x560be3ee5b40 <main(int, char**)>, argc=10, argv=0x7fffdb15b558, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffdb15b548) at ../csu/libc-start.c:310
          		 
          #6  0x0000560be3f174ca in _start ()

          Roel Roel Van de Paar added a comment - gdb break-in to hang; Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". 0x000014b6ea62cbf9 in __GI___poll (fds=fds@entry=0x7fffdb15b190, nfds=nfds@entry=2, timeout=timeout@entry=-1) at ../sysdeps/unix/sysv/linux/poll.c:29 (gdb) set pagination off (gdb) thread apply all bt   Thread 13 (Thread 0x14b6cbfff700 (LWP 57617)): #0 0x000014b6eb241f85 in futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x14b6cbffed80, expected=0, futex_word=0x14b6e9b9922c) at ../sysdeps/unix/sysv/linux/futex-internal.h:205 #1 __pthread_cond_wait_common (abstime=0x14b6cbffed80, mutex=0x14b6e9843b10, cond=0x14b6e9b99200) at pthread_cond_wait.c:539 #2 __pthread_cond_timedwait (cond=0x14b6e9b99200, mutex=0x14b6e9843b10, abstime=0x14b6cbffed80) at pthread_cond_wait.c:667 #3 0x0000560be4799d76 in __gthread_cond_timedwait (__abs_timeout=0x14b6cbffed80, __mutex=<optimized out>, __cond=0x14b6e9b99200) at /usr/include/x86_64-linux-gnu/c++/7/bits/gthr-default.h:871 #4 std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (__atime=..., __lock=..., this=0x14b6e9b99200) at /usr/include/c++/7/condition_variable:178 #5 std::condition_variable::wait_until<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (__atime=..., __lock=..., this=0x14b6e9b99200) at /usr/include/c++/7/condition_variable:106 #6 std::condition_variable::wait_for<long, std::ratio<1l, 1000l> > (__rtime=..., __lock=..., this=0x14b6e9b99200) at /usr/include/c++/7/condition_variable:143 #7 tpool::thread_pool_generic::wait_for_tasks (this=this@entry=0x14b6e9843a00, lk=..., thread_data=thread_data@entry=0x14b6e9b99200) at /test/10.5_opt/tpool/tpool_generic.cc:418 #8 0x0000560be479a300 in tpool::thread_pool_generic::get_task (this=this@entry=0x14b6e9843a00, thread_var=thread_var@entry=0x14b6e9b99200, t=t@entry=0x14b6cbffee28) at /test/10.5_opt/tpool/tpool_generic.cc:471 #9 0x0000560be479bbad in tpool::thread_pool_generic::worker_main (this=0x14b6e9843a00, thread_var=0x14b6e9b99200) at /test/10.5_opt/tpool/tpool_generic.cc:516 #10 0x000014b6ead646df in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6 #11 0x000014b6eb23b6db in start_thread (arg=0x14b6cbfff700) at pthread_create.c:463 #12 0x000014b6ea63988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95   Thread 12 (Thread 0x14b6ca9fe700 (LWP 57616)): #0 0x000014b6eb241f85 in futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x14b6ca9fdd80, expected=0, futex_word=0x14b6e9b997a8) at ../sysdeps/unix/sysv/linux/futex-internal.h:205 #1 __pthread_cond_wait_common (abstime=0x14b6ca9fdd80, mutex=0x14b6e9843b10, cond=0x14b6e9b99780) at pthread_cond_wait.c:539 #2 __pthread_cond_timedwait (cond=0x14b6e9b99780, mutex=0x14b6e9843b10, abstime=0x14b6ca9fdd80) at pthread_cond_wait.c:667 #3 0x0000560be4799d76 in __gthread_cond_timedwait (__abs_timeout=0x14b6ca9fdd80, __mutex=<optimized out>, __cond=0x14b6e9b99780) at /usr/include/x86_64-linux-gnu/c++/7/bits/gthr-default.h:871 #4 std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (__atime=..., __lock=..., this=0x14b6e9b99780) at /usr/include/c++/7/condition_variable:178 #5 std::condition_variable::wait_until<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (__atime=..., __lock=..., this=0x14b6e9b99780) at /usr/include/c++/7/condition_variable:106 #6 std::condition_variable::wait_for<long, std::ratio<1l, 1000l> > (__rtime=..., __lock=..., this=0x14b6e9b99780) at /usr/include/c++/7/condition_variable:143 #7 tpool::thread_pool_generic::wait_for_tasks (this=this@entry=0x14b6e9843a00, lk=..., thread_data=thread_data@entry=0x14b6e9b99780) at /test/10.5_opt/tpool/tpool_generic.cc:418 #8 0x0000560be479a300 in tpool::thread_pool_generic::get_task (this=this@entry=0x14b6e9843a00, thread_var=thread_var@entry=0x14b6e9b99780, t=t@entry=0x14b6ca9fde28) at /test/10.5_opt/tpool/tpool_generic.cc:471 #9 0x0000560be479bbad in tpool::thread_pool_generic::worker_main (this=0x14b6e9843a00, thread_var=0x14b6e9b99780) at /test/10.5_opt/tpool/tpool_generic.cc:516 #10 0x000014b6ead646df in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6 #11 0x000014b6eb23b6db in start_thread (arg=0x14b6ca9fe700) at pthread_create.c:463 #12 0x000014b6ea63988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95   Thread 11 (Thread 0x14b6ebdc9700 (LWP 57112)): #0 __lll_lock_wait () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135 #1 0x000014b6eb23e154 in __GI___pthread_mutex_lock (mutex=0x560be536c0a0 <LOCK_global_system_variables>) at ../nptl/pthread_mutex_lock.c:133 #2 0x0000560be3f8fa35 in inline_mysql_mutex_lock (that=that@entry=0x560be536c0a0 <LOCK_global_system_variables>, src_line=src_line@entry=1247, src_file=0x560be497cdb0 "/test/10.5_opt/sql/sql_class.cc") at /test/10.5_opt/include/mysql/psi/mysql_thread.h:765 #3 0x0000560be3f954c4 in THD::init (this=this@entry=0x14b6cb813018) at /test/10.5_opt/sql/sql_class.cc:1247 #4 0x0000560be3f9a729 in THD::THD (this=0x14b6cb813018, id=<optimized out>, is_wsrep_applier=<optimized out>) at /test/10.5_opt/sql/sql_class.cc:844 #5 0x0000560be40cfe6c in CONNECT::create_thd (this=this@entry=0x14b6e9832ad8, thd=thd@entry=0x0) at /test/10.5_opt/sql/sql_connect.cc:1539 #6 0x0000560be40cff7e in do_handle_one_connection (connect=connect@entry=0x14b6e9832ad8, put_in_cache=put_in_cache@entry=true) at /test/10.5_opt/sql/sql_connect.cc:1363 #7 0x0000560be40d0494 in handle_one_connection (arg=arg@entry=0x14b6e9832ad8) at /test/10.5_opt/sql/sql_connect.cc:1319 #8 0x0000560be443c5ea in pfs_spawn_thread (arg=0x14b6e984b218) at /test/10.5_opt/storage/perfschema/pfs.cc:2201 #9 0x000014b6eb23b6db in start_thread (arg=0x14b6ebdc9700) at pthread_create.c:463 #10 0x000014b6ea63988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95   Thread 10 (Thread 0x14b6ebe14700 (LWP 55695)): #0 __lll_lock_wait () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135 #1 0x000014b6eb23e154 in __GI___pthread_mutex_lock (mutex=mutex@entry=0x560be536c0a0 <LOCK_global_system_variables>) at ../nptl/pthread_mutex_lock.c:133 #2 0x0000560be3ff1d40 in inline_mysql_mutex_lock (src_file=0x560be49808c0 "/test/10.5_opt/sql/sql_plugin.cc", src_line=3054, that=<optimized out>) at /test/10.5_opt/include/mysql/psi/mysql_thread.h:765 #3 sync_dynamic_session_variables (thd=thd@entry=0x14b6c7412018, global_lock=global_lock@entry=true) at /test/10.5_opt/sql/sql_plugin.cc:3054 #4 0x0000560be405489d in fill_variables (thd=0x14b6c7412018, tables=0x14b6c74473e8, cond=<optimized out>) at /test/10.5_opt/sql/sql_show.cc:7778 #5 0x0000560be40586d5 in get_schema_tables_result (join=join@entry=0x14b6c7447d68, executed_place=executed_place@entry=PROCESSED_BY_JOIN_EXEC) at /test/10.5_opt/sql/sql_show.cc:8653 #6 0x0000560be403f26d in JOIN::exec_inner (this=this@entry=0x14b6c7447d68) at /test/10.5_opt/sql/sql_select.cc:4421 #7 0x0000560be403f8d7 in JOIN::exec (this=this@entry=0x14b6c7447d68) at /test/10.5_opt/sql/sql_select.cc:4245 #8 0x0000560be403dc22 in mysql_select (thd=thd@entry=0x14b6c7412018, tables=0x14b6c74473e8, fields=..., conds=0x0, og_num=<optimized out>, order=0x0, group=0x0, having=0x0, proc_param=0x0, select_options=2684619520, result=0x14b6c7447d40, unit=0x14b6c7415e68, select_lex=0x14b6c7416668) at /test/10.5_opt/sql/sql_select.cc:4669 #9 0x0000560be403e5e1 in handle_select (thd=thd@entry=0x14b6c7412018, lex=lex@entry=0x14b6c7415da0, result=result@entry=0x14b6c7447d40, setup_tables_done_option=setup_tables_done_option@entry=0) at /test/10.5_opt/sql/sql_select.cc:417 #10 0x0000560be3fe51c1 in execute_sqlcom_select (thd=thd@entry=0x14b6c7412018, all_tables=0x14b6c74473e8) at /test/10.5_opt/sql/sql_parse.cc:6172 #11 0x0000560be3fe10e2 in mysql_execute_command (thd=thd@entry=0x14b6c7412018) at /test/10.5_opt/sql/sql_parse.cc:3901 #12 0x0000560be3fe827c in mysql_parse (thd=0x14b6c7412018, rawbuf=<optimized out>, length=14, parser_state=0x14b6ebe134d0, is_com_multi=<optimized out>, is_next_command=<optimized out>) at /test/10.5_opt/sql/sql_parse.cc:7957 #13 0x0000560be3fdd8a5 in dispatch_command (command=command@entry=COM_QUERY, thd=thd@entry=0x14b6c7412018, packet=packet@entry=0x14b6c743a019 "SHOW VARIABLES", packet_length=packet_length@entry=14, is_com_multi=is_com_multi@entry=false, is_next_command=is_next_command@entry=false) at /test/10.5_opt/sql/sql_parse.cc:1839 #14 0x0000560be3fdbb36 in do_command (thd=0x14b6c7412018) at /test/10.5_opt/sql/sql_parse.cc:1358 #15 0x0000560be40d02ee in do_handle_one_connection (connect=<optimized out>, connect@entry=0x14b6e98329b8, put_in_cache=put_in_cache@entry=true) at /test/10.5_opt/sql/sql_connect.cc:1422 #16 0x0000560be40d0494 in handle_one_connection (arg=arg@entry=0x14b6e98329b8) at /test/10.5_opt/sql/sql_connect.cc:1319 #17 0x0000560be443c5ea in pfs_spawn_thread (arg=0x14b6e984b018) at /test/10.5_opt/storage/perfschema/pfs.cc:2201 #18 0x000014b6eb23b6db in start_thread (arg=0x14b6ebe14700) at pthread_create.c:463 #19 0x000014b6ea63988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95   Thread 9 (Thread 0x14b6ebe5f700 (LWP 55693)): #0 0x000014b6eb2419f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x560be536eb4c <COND_slave_background+44>) at ../sysdeps/unix/sysv/linux/futex-internal.h:88 #1 __pthread_cond_wait_common (abstime=0x0, mutex=0x560be536bfe0 <LOCK_slave_background>, cond=0x560be536eb20 <COND_slave_background>) at pthread_cond_wait.c:502 #2 __pthread_cond_wait (cond=0x560be536eb20 <COND_slave_background>, mutex=0x560be536bfe0 <LOCK_slave_background>) at pthread_cond_wait.c:655 #3 0x0000560be3f376cf in inline_mysql_cond_wait (that=<optimized out>, mutex=<optimized out>, src_file=0x560be497a07d "/test/10.5_opt/sql/slave.cc", src_line=525) at /test/10.5_opt/include/mysql/psi/mysql_thread.h:1231 #4 handle_slave_background (arg=arg@entry=0x0) at /test/10.5_opt/sql/slave.cc:525 #5 0x0000560be443c5ea in pfs_spawn_thread (arg=0x14b6e984ae18) at /test/10.5_opt/storage/perfschema/pfs.cc:2201 #6 0x000014b6eb23b6db in start_thread (arg=0x14b6ebe5f700) at pthread_create.c:463 #7 0x000014b6ea63988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95   Thread 8 (Thread 0x14b6ebeaa700 (LWP 55692)): #0 0x000014b6ea55826c in __GI___sigtimedwait (set=<optimized out>, set@entry=0x14b6ebea9cf0, info=info@entry=0x14b6ebea9d70, timeout=timeout@entry=0x0) at ../sysdeps/unix/sysv/linux/sigtimedwait.c:42 #1 0x000014b6ea5582e7 in __GI___sigwaitinfo (set=set@entry=0x14b6ebea9cf0, info=info@entry=0x14b6ebea9d70) at ../sysdeps/unix/sysv/linux/sigwaitinfo.c:25 #2 0x0000560be3f1982b in my_sigwait (code=<synthetic pointer>, sig=0x14b6ebea9ce8, set=0x14b6ebea9cf0) at /test/10.5_opt/include/my_pthread.h:196 #3 signal_hand (arg=arg@entry=0x0) at /test/10.5_opt/sql/mysqld.cc:3092 #4 0x0000560be443c5ea in pfs_spawn_thread (arg=0x14b6e984a618) at /test/10.5_opt/storage/perfschema/pfs.cc:2201 #5 0x000014b6eb23b6db in start_thread (arg=0x14b6ebeaa700) at pthread_create.c:463 #6 0x000014b6ea63988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95   Thread 7 (Thread 0x14b6cabff700 (LWP 55686)): #0 0x000014b6eb241f85 in futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x14b6cabfed80, expected=0, futex_word=0x14b6e9b99828) at ../sysdeps/unix/sysv/linux/futex-internal.h:205 #1 __pthread_cond_wait_common (abstime=0x14b6cabfed80, mutex=0x14b6e9843b10, cond=0x14b6e9b99800) at pthread_cond_wait.c:539 #2 __pthread_cond_timedwait (cond=0x14b6e9b99800, mutex=0x14b6e9843b10, abstime=0x14b6cabfed80) at pthread_cond_wait.c:667 #3 0x0000560be4799d76 in __gthread_cond_timedwait (__abs_timeout=0x14b6cabfed80, __mutex=<optimized out>, __cond=0x14b6e9b99800) at /usr/include/x86_64-linux-gnu/c++/7/bits/gthr-default.h:871 #4 std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (__atime=..., __lock=..., this=0x14b6e9b99800) at /usr/include/c++/7/condition_variable:178 #5 std::condition_variable::wait_until<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (__atime=..., __lock=..., this=0x14b6e9b99800) at /usr/include/c++/7/condition_variable:106 #6 std::condition_variable::wait_for<long, std::ratio<1l, 1000l> > (__rtime=..., __lock=..., this=0x14b6e9b99800) at /usr/include/c++/7/condition_variable:143 #7 tpool::thread_pool_generic::wait_for_tasks (this=this@entry=0x14b6e9843a00, lk=..., thread_data=thread_data@entry=0x14b6e9b99800) at /test/10.5_opt/tpool/tpool_generic.cc:418 #8 0x0000560be479a300 in tpool::thread_pool_generic::get_task (this=this@entry=0x14b6e9843a00, thread_var=thread_var@entry=0x14b6e9b99800, t=t@entry=0x14b6cabfee28) at /test/10.5_opt/tpool/tpool_generic.cc:471 #9 0x0000560be479bbad in tpool::thread_pool_generic::worker_main (this=0x14b6e9843a00, thread_var=0x14b6e9b99800) at /test/10.5_opt/tpool/tpool_generic.cc:516 #10 0x000014b6ead646df in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6 #11 0x000014b6eb23b6db in start_thread (arg=0x14b6cabff700) at pthread_create.c:463 #12 0x000014b6ea63988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95   Thread 6 (Thread 0x14b6cb7ff700 (LWP 55684)): #0 0x000014b6eb241f85 in futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x14b6cb7fed80, expected=0, futex_word=0x14b6e9b9992c) at ../sysdeps/unix/sysv/linux/futex-internal.h:205 #1 __pthread_cond_wait_common (abstime=0x14b6cb7fed80, mutex=0x14b6e9843b10, cond=0x14b6e9b99900) at pthread_cond_wait.c:539 #2 __pthread_cond_timedwait (cond=0x14b6e9b99900, mutex=0x14b6e9843b10, abstime=0x14b6cb7fed80) at pthread_cond_wait.c:667 #3 0x0000560be4799d76 in __gthread_cond_timedwait (__abs_timeout=0x14b6cb7fed80, __mutex=<optimized out>, __cond=0x14b6e9b99900) at /usr/include/x86_64-linux-gnu/c++/7/bits/gthr-default.h:871 #4 std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (__atime=..., __lock=..., this=0x14b6e9b99900) at /usr/include/c++/7/condition_variable:178 #5 std::condition_variable::wait_until<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (__atime=..., __lock=..., this=0x14b6e9b99900) at /usr/include/c++/7/condition_variable:106 #6 std::condition_variable::wait_for<long, std::ratio<1l, 1000l> > (__rtime=..., __lock=..., this=0x14b6e9b99900) at /usr/include/c++/7/condition_variable:143 #7 tpool::thread_pool_generic::wait_for_tasks (this=this@entry=0x14b6e9843a00, lk=..., thread_data=thread_data@entry=0x14b6e9b99900) at /test/10.5_opt/tpool/tpool_generic.cc:418 #8 0x0000560be479a300 in tpool::thread_pool_generic::get_task (this=this@entry=0x14b6e9843a00, thread_var=thread_var@entry=0x14b6e9b99900, t=t@entry=0x14b6cb7fee28) at /test/10.5_opt/tpool/tpool_generic.cc:471 #9 0x0000560be479bbad in tpool::thread_pool_generic::worker_main (this=0x14b6e9843a00, thread_var=0x14b6e9b99900) at /test/10.5_opt/tpool/tpool_generic.cc:516 #10 0x000014b6ead646df in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6 #11 0x000014b6eb23b6db in start_thread (arg=0x14b6cb7ff700) at pthread_create.c:463 #12 0x000014b6ea63988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95   Thread 5 (Thread 0x14b6cc7ff700 (LWP 55681)): #0 0x000014b6eb241f85 in futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x14b6cc7feb80, expected=0, futex_word=0x14b6e9b55cfc) at ../sysdeps/unix/sysv/linux/futex-internal.h:205 #1 __pthread_cond_wait_common (abstime=0x14b6cc7feb80, mutex=0x14b6e9b55ca8, cond=0x14b6e9b55cd0) at pthread_cond_wait.c:539 #2 __pthread_cond_timedwait (cond=cond@entry=0x14b6e9b55cd0, mutex=mutex@entry=0x14b6e9b55ca8, abstime=abstime@entry=0x14b6cc7feb80) at pthread_cond_wait.c:667 #3 0x0000560be456b6d2 in os_event::timed_wait (this=this@entry=0x14b6e9b55c98, abstime=abstime@entry=0x14b6cc7feb80) at /test/10.5_opt/storage/innobase/os/os0event.cc:275 #4 0x0000560be456bc91 in os_event::wait_time_low (reset_sig_count=2, time_in_usec=1000000, this=0x14b6e9b55c98) at /test/10.5_opt/storage/innobase/os/os0event.cc:385 #5 os_event_wait_time_low (event=0x14b6e9b55c98, time_in_usec=time_in_usec@entry=1000000, reset_sig_count=reset_sig_count@entry=2) at /test/10.5_opt/storage/innobase/os/os0event.cc:485 #6 0x0000560be46ba7ab in pc_sleep_if_needed (cur_time=9488233, sig_count=2, next_loop_time=9489233) at /test/10.5_opt/storage/innobase/buf/buf0flu.cc:2552 #7 buf_flush_page_cleaner () at /test/10.5_opt/storage/innobase/buf/buf0flu.cc:2840 #8 0x000014b6eb23b6db in start_thread (arg=0x14b6cc7ff700) at pthread_create.c:463 #9 0x000014b6ea63988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95   Thread 4 (Thread 0x14b6d77ff700 (LWP 55680)): #0 0x000014b6eb45363a in ?? () from /lib/x86_64-linux-gnu/libaio.so.1 #1 0x0000560be479d6c5 in tpool::aio_linux::getevent_thread_routine (aio=0x14b6e9b52040) at /test/10.5_opt/tpool/aio_linux.cc:53 #2 0x000014b6ead646df in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6 #3 0x000014b6eb23b6db in start_thread (arg=0x14b6d77ff700) at pthread_create.c:463 #4 0x000014b6ea63988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95   Thread 3 (Thread 0x14b6e2758700 (LWP 55679)): #0 0x000014b6eb241f85 in futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x14b6e2757d60, expected=0, futex_word=0x560be5ba3d88 <COND_checkpoint+40>) at ../sysdeps/unix/sysv/linux/futex-internal.h:205 #1 __pthread_cond_wait_common (abstime=0x14b6e2757d60, mutex=0x560be5ba3da0 <LOCK_checkpoint>, cond=0x560be5ba3d60 <COND_checkpoint>) at pthread_cond_wait.c:539 #2 __pthread_cond_timedwait (cond=cond@entry=0x560be5ba3d60 <COND_checkpoint>, mutex=mutex@entry=0x560be5ba3da0 <LOCK_checkpoint>, abstime=abstime@entry=0x14b6e2757d60) at pthread_cond_wait.c:667 #3 0x0000560be43cd449 in inline_mysql_cond_timedwait (src_file=0x560be4aebb38 "/test/10.5_opt/storage/maria/ma_servicethread.c", src_line=116, abstime=0x14b6e2757d60, mutex=0x560be5ba3da0 <LOCK_checkpoint>, that=0x560be5ba3d60 <COND_checkpoint>) at /test/10.5_opt/include/mysql/psi/mysql_thread.h:1268 #4 my_service_thread_sleep (control=control@entry=0x560be52de3a0 <checkpoint_control>, sleep_time=sleep_time@entry=30000000000) at /test/10.5_opt/storage/maria/ma_servicethread.c:115 #5 0x0000560be43c14f0 in ma_checkpoint_background (arg=0x1e) at /test/10.5_opt/storage/maria/ma_checkpoint.c:707 #6 0x000014b6eb23b6db in start_thread (arg=0x14b6e2758700) at pthread_create.c:463 #7 0x000014b6ea63988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95   Thread 2 (Thread 0x14b6ebee0700 (LWP 55678)): #0 0x000014b6eb241f85 in futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x14b6ebedfdf0, expected=0, futex_word=0x560be5c49ae8 <COND_timer+40>) at ../sysdeps/unix/sysv/linux/futex-internal.h:205 #1 __pthread_cond_wait_common (abstime=0x14b6ebedfdf0, mutex=0x560be5c49b00 <LOCK_timer>, cond=0x560be5c49ac0 <COND_timer>) at pthread_cond_wait.c:539 #2 __pthread_cond_timedwait (cond=cond@entry=0x560be5c49ac0 <COND_timer>, mutex=mutex@entry=0x560be5c49b00 <LOCK_timer>, abstime=abstime@entry=0x14b6ebedfdf0) at pthread_cond_wait.c:667 #3 0x0000560be4819532 in inline_mysql_cond_timedwait (that=0x560be5c49ac0 <COND_timer>, mutex=0x560be5c49b00 <LOCK_timer>, src_file=0x560be4b5b098 "/test/10.5_opt/mysys/thr_timer.c", src_line=321, abstime=0x14b6ebedfdf0) at /test/10.5_opt/include/mysql/psi/mysql_thread.h:1268 #4 timer_handler (arg=<optimized out>) at /test/10.5_opt/mysys/thr_timer.c:321 #5 0x000014b6eb23b6db in start_thread (arg=0x14b6ebee0700) at pthread_create.c:463 #6 0x000014b6ea63988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95   Thread 1 (Thread 0x14b6ebee17c0 (LWP 55674)): #0 0x000014b6ea62cbf9 in __GI___poll (fds=fds@entry=0x7fffdb15b190, nfds=nfds@entry=2, timeout=timeout@entry=-1) at ../sysdeps/unix/sysv/linux/poll.c:29 #1 0x000014b6ea64cc1e in __poll_chk (fds=fds@entry=0x7fffdb15b190, nfds=nfds@entry=2, timeout=timeout@entry=-1, fdslen=fdslen@entry=24) at poll_chk.c:27 #2 0x0000560be3f22287 in poll (__timeout=-1, __nfds=2, __fds=0x7fffdb15b190) at /usr/include/x86_64-linux-gnu/bits/poll2.h:41 #3 handle_connections_sockets () at /test/10.5_opt/sql/mysqld.cc:6267 #4 0x0000560be3f233b8 in mysqld_main (argc=<optimized out>, argv=<optimized out>) at /test/10.5_opt/sql/mysqld.cc:5729 #5 0x000014b6ea539b97 in __libc_start_main (main=0x560be3ee5b40 <main(int, char**)>, argc=10, argv=0x7fffdb15b558, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffdb15b548) at ../csu/libc-start.c:310 #6 0x0000560be3f174ca in _start ()
          Roel Roel Van de Paar added a comment - - edited

          short strace follow during hang

          $ sudo strace -if -p 55674
          		 
          strace: Process 55674 attached with 12 threads
          		 
          [pid 58275] [000014b6eb24510d] futex(0x560be536c0a0, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...>
          		 
          [pid 58033] [000014b6eb241f85] restart_syscall(<... resuming interrupted futex ...> <unfinished ...>
          		 
          [pid 57112] [000014b6eb24510d] futex(0x560be536c0a0, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...>
          		 
          [pid 55695] [000014b6eb24510d] futex(0x560be536c0a0, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...>
          		 
          [pid 55693] [000014b6eb2419f3] futex(0x560be536eb4c, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
          		 
          [pid 55692] [000014b6ea55826c] rt_sigtimedwait([HUP QUIT ALRM TERM TSTP],  <unfinished ...>
          		 
          [pid 55686] [000014b6eb241f85] restart_syscall(<... resuming interrupted futex ...> <unfinished ...>
          		 
          [pid 55681] [000014b6eb241f85] restart_syscall(<... resuming interrupted futex ...> <unfinished ...>
          		 
          [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1,  <unfinished ...>
          		 
          [pid 55679] [000014b6eb241f85] restart_syscall(<... resuming interrupted futex ...> <unfinished ...>
          		 
          [pid 55678] [000014b6eb241f85] restart_syscall(<... resuming interrupted futex ...> <unfinished ...>
          		 
          [pid 55674] [000014b6ea62cbf9] restart_syscall(<... resuming interrupted restart_syscall ...> <unfinished ...>
          		 
          [pid 55678] [000014b6eb241f85] <... restart_syscall resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194459, tv_nsec=864239000}, 0xffffffff <unfinished ...>
          		 
          [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0
          		 
          [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1,  <unfinished ...>
          		 
          [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194459, tv_nsec=989966000}, 0xffffffff) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb24241c] futex(0x14b6e9b99828, FUTEX_WAKE_PRIVATE, 1) = 1
          		 
          [pid 55686] [000014b6eb241f85] <... restart_syscall resumed> ) = 0
          		 
          [pid 55686] [000014b6eb24510d] futex(0x14b6e9843b10, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...>
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 55686] [000014b6eb24510d] <... futex resumed> ) = -1 EAGAIN (Resource temporarily unavailable)
          		 
          [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 55686] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 55686] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 55686] [000014b6eb241f85] futex(0x14b6e9b9982c, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194519, tv_nsec=990474986}, 0xffffffff <unfinished ...>
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194460, tv_nsec=28221000}, 0xffffffff <unfinished ...>
          		 
          [pid 55681] [000014b6eb241f85] <... restart_syscall resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55681] [000014b6eb2451aa] futex(0x14b6e9b55ca8, FUTEX_WAKE_PRIVATE, 1) = 0
          		 
          [pid 55681] [000014b6eb241f85] futex(0x14b6e9b55cfc, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194461, tv_nsec=23288000}, 0xffffffff <unfinished ...>
          		 
          [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb24241c] futex(0x14b6e9b9982c, FUTEX_WAKE_PRIVATE, 1) = 1
          		 
          [pid 55686] [000014b6eb241f85] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb24241c] futex(0x14b6e9b99228, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 55686] [000014b6eb24510d] futex(0x14b6e9843b10, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...>
          		 
          [pid 55678] [000014b6eb24241c] <... futex resumed> ) = 1
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 58033] [000014b6eb241f85] <... restart_syscall resumed> ) = 0
          		 
          [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 1
          		 
          [pid 55686] [000014b6eb24510d] <... futex resumed> ) = 0
          		 
          [pid 58033] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 55686] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 58033] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 55686] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 58033] [000014b6eb241f85] futex(0x14b6e9b9922c, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194520, tv_nsec=28803608}, 0xffffffff <unfinished ...>
          		 
          [pid 55686] [000014b6eb241f85] futex(0x14b6e9b99828, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194520, tv_nsec=28808954}, 0xffffffff <unfinished ...>
          		 
          [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194460, tv_nsec=264516000}, 0xffffffff) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194460, tv_nsec=664785000}, 0xffffffff <unfinished ...>
          		 
          [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0
          		 
          [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1,  <unfinished ...>
          		 
          [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194461, tv_nsec=28802000}, 0xffffffff <unfinished ...>
          		 
          [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0
          		 
          [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1,  <unfinished ...>
          		 
          [pid 55681] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55681] [000014b6eb2451aa] futex(0x14b6e9b55ca8, FUTEX_WAKE_PRIVATE, 1) = 0
          		 
          [pid 55681] [000014b6eb241f85] futex(0x14b6e9b55cfc, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194462, tv_nsec=23803000}, 0xffffffff <unfinished ...>
          		 
          [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb24241c] futex(0x14b6e9b99828, FUTEX_WAKE_PRIVATE, 1) = 1
          		 
          [pid 55686] [000014b6eb241f85] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb24241c] futex(0x14b6e9b9922c, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 55686] [000014b6eb24510d] futex(0x14b6e9843b10, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...>
          		 
          [pid 55678] [000014b6eb24241c] <... futex resumed> ) = 1
          		 
          [pid 58033] [000014b6eb241f85] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 55686] [000014b6eb24510d] <... futex resumed> ) = -1 EAGAIN (Resource temporarily unavailable)
          		 
          [pid 58033] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 55686] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 58033] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 58033] [000014b6eb24510d] futex(0x560be5c49b00, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...>
          		 
          [pid 55686] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 58033] [000014b6eb24510d] <... futex resumed> ) = -1 EAGAIN (Resource temporarily unavailable)
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 58033] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 55686] [000014b6eb241f85] futex(0x14b6e9b9982c, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194521, tv_nsec=29437839}, 0xffffffff <unfinished ...>
          		 
          [pid 58033] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 58033] [000014b6eb241f85] futex(0x14b6e9b99228, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194521, tv_nsec=29509936}, 0xffffffff <unfinished ...>
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194461, tv_nsec=65090000}, 0xffffffff) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194461, tv_nsec=465350000}, 0xffffffff <unfinished ...>
          		 
          [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0
          		 
          [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1,  <unfinished ...>
          		 
          [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194461, tv_nsec=865626000}, 0xffffffff <unfinished ...>
          		 
          [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0
          		 
          [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1,  <unfinished ...>
          		 
          [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194462, tv_nsec=29436000}, 0xffffffff <unfinished ...>
          		 
          [pid 55681] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55681] [000014b6eb2451aa] futex(0x14b6e9b55ca8, FUTEX_WAKE_PRIVATE, 1) = 0
          		 
          [pid 55681] [000014b6eb241f85] futex(0x14b6e9b55cfc, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194463, tv_nsec=24234000}, 0xffffffff <unfinished ...>
          		 
          [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb24241c] futex(0x14b6e9b99228, FUTEX_WAKE_PRIVATE, 1) = 1
          		 
          [pid 58033] [000014b6eb241f85] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb24241c] futex(0x14b6e9b9982c, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 58033] [000014b6eb24510d] futex(0x14b6e9843b10, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...>
          		 
          [pid 55686] [000014b6eb241f85] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb24241c] <... futex resumed> ) = 1
          		 
          [pid 55686] [000014b6eb24510d] futex(0x14b6e9843b10, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...>
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 55686] [000014b6eb24510d] <... futex resumed> ) = -1 EAGAIN (Resource temporarily unavailable)
          		 
          [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 1
          		 
          [pid 58033] [000014b6eb24510d] <... futex resumed> ) = 0
          		 
          [pid 55686] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 58033] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 55686] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 58033] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 55686] [000014b6eb241f85] futex(0x14b6e9b99828, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194522, tv_nsec=30062397}, 0xffffffff <unfinished ...>
          		 
          [pid 58033] [000014b6eb241f85] futex(0x14b6e9b9922c, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194522, tv_nsec=30071555}, 0xffffffff <unfinished ...>
          		 
          [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194462, tv_nsec=265879000}, 0xffffffff) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194462, tv_nsec=666136000}, 0xffffffff <unfinished ...>
          		 
          [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0
          		 
          [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1,  <unfinished ...>
          		 
          [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194463, tv_nsec=30060000}, 0xffffffff <unfinished ...>
          		 
          [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0
          		 
          [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1,  <unfinished ...>
          		 
          [pid 55681] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55681] [000014b6eb2451aa] futex(0x14b6e9b55ca8, FUTEX_WAKE_PRIVATE, 1) = 0
          		 
          [pid 55681] [000014b6eb241f85] futex(0x14b6e9b55cfc, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194464, tv_nsec=24624000}, 0xffffffff <unfinished ...>
          		 
          [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb24241c] futex(0x14b6e9b9922c, FUTEX_WAKE_PRIVATE, 1) = 1
          		 
          [pid 58033] [000014b6eb241f85] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb24241c] futex(0x14b6e9b99828, FUTEX_WAKE_PRIVATE, 1) = 1
          		 
          [pid 58033] [000014b6eb24510d] futex(0x14b6e9843b10, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...>
          		 
          [pid 55686] [000014b6eb241f85] <... futex resumed> ) = 0
          		 
          [pid 58033] [000014b6eb24510d] <... futex resumed> ) = -1 EAGAIN (Resource temporarily unavailable)
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 58033] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 55686] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 58033] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 55686] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 58033] [000014b6eb241f85] futex(0x14b6e9b99228, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194523, tv_nsec=30603348}, 0xffffffff <unfinished ...>
          		 
          [pid 55686] [000014b6eb241f85] futex(0x14b6e9b9982c, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194523, tv_nsec=30606120}, 0xffffffff <unfinished ...>
          		 
          [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194463, tv_nsec=66410000}, 0xffffffff) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194463, tv_nsec=466640000}, 0xffffffff <unfinished ...>
          		 
          [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0
          		 
          [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1,  <unfinished ...>
          		 
          [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194463, tv_nsec=866933000}, 0xffffffff <unfinished ...>
          		 
          [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0
          		 
          [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1,  <unfinished ...>
          		 
          [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194464, tv_nsec=30602000}, 0xffffffff <unfinished ...>
          		 
          [pid 55681] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55681] [000014b6eb2451aa] futex(0x14b6e9b55ca8, FUTEX_WAKE_PRIVATE, 1) = 0
          		 
          [pid 55681] [000014b6eb241f85] futex(0x14b6e9b55cfc, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194465, tv_nsec=24946000}, 0xffffffff <unfinished ...>
          		 
          [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb24241c] futex(0x14b6e9b9982c, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 55686] [000014b6eb241f85] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb24241c] <... futex resumed> ) = 1
          		 
          [pid 55686] [000014b6eb24510d] futex(0x14b6e9843b10, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...>
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 55686] [000014b6eb24510d] <... futex resumed> ) = -1 EAGAIN (Resource temporarily unavailable)
          		 
          [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 55686] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 55678] [000014b6eb24241c] futex(0x14b6e9b99228, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 55686] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb24241c] <... futex resumed> ) = 1
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 58033] [000014b6eb241f85] <... futex resumed> ) = 0
          		 
          [pid 55686] [000014b6eb241f85] futex(0x14b6e9b99828, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194524, tv_nsec=31140293}, 0xffffffff <unfinished ...>
          		 
          [pid 58033] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 58033] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 58033] [000014b6eb241f85] futex(0x14b6e9b9922c, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194524, tv_nsec=31191770}, 0xffffffff <unfinished ...>
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194464, tv_nsec=267221000}, 0xffffffff) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194464, tv_nsec=667471000}, 0xffffffff <unfinished ...>
          		 
          [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0
          		 
          [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1,  <unfinished ...>
          		 
          [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194464, tv_nsec=990473000}, 0xffffffff <unfinished ...>
          		 
          [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0
          		 
          [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1,  <unfinished ...>
          		 
          [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb24241c] futex(0x14b6e9b9922c, FUTEX_WAKE_PRIVATE, 1) = 1
          		 
          [pid 58033] [000014b6eb241f85] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 58033] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1) = 0
          		 
          [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 58033] [000014b6eb241f85] futex(0x14b6e9b99228, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194524, tv_nsec=990963940}, 0xffffffff <unfinished ...>
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194465, tv_nsec=31123000}, 0xffffffff <unfinished ...>
          		 
          [pid 55681] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55681] [000014b6eb2451aa] futex(0x14b6e9b55ca8, FUTEX_WAKE_PRIVATE, 1) = 0
          		 
          [pid 55681] [000014b6eb241f85] futex(0x14b6e9b55cfc, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194466, tv_nsec=25307000}, 0xffffffff <unfinished ...>
          		 
          [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb24241c] futex(0x14b6e9b99228, FUTEX_WAKE_PRIVATE, 1) = 1
          		 
          [pid 58033] [000014b6eb241f85] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb24241c] futex(0x14b6e9b99828, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 58033] [000014b6eb24510d] futex(0x14b6e9843b10, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...>
          		 
          [pid 55678] [000014b6eb24241c] <... futex resumed> ) = 1
          		 
          [pid 55686] [000014b6eb241f85] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 55686] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 58033] [000014b6eb24510d] <... futex resumed> ) = 0
          		 
          [pid 55686] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 58033] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 55686] [000014b6eb24510d] futex(0x560be5c49b00, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...>
          		 
          [pid 58033] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 1
          		 
          [pid 58033] [000014b6eb24510d] futex(0x560be5c49b00, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...>
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 58033] [000014b6eb24510d] <... futex resumed> ) = -1 EAGAIN (Resource temporarily unavailable)
          		 
          [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 1
          		 
          [pid 58033] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 55686] [000014b6eb24510d] <... futex resumed> ) = 0
          		 
          [pid 58033] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 55686] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 58033] [000014b6eb241f85] futex(0x14b6e9b9922c, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194525, tv_nsec=31856264}, 0xffffffff <unfinished ...>
          		 
          [pid 55686] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194465, tv_nsec=67714000}, 0xffffffff <unfinished ...>
          		 
          [pid 55686] [000014b6eb241f85] futex(0x14b6e9b9982c, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194525, tv_nsec=31910626}, 0xffffffff <unfinished ...>
          		 
          [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194465, tv_nsec=467933000}, 0xffffffff <unfinished ...>
          		 
          [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0
          		 
          [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1,  <unfinished ...>
          		 
          [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194465, tv_nsec=868214000}, 0xffffffff <unfinished ...>
          		 
          [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0
          		 
          [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1,  <unfinished ...>
          		 
          [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194466, tv_nsec=31854000}, 0xffffffff <unfinished ...>
          		 
          [pid 55681] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55681] [000014b6eb2451aa] futex(0x14b6e9b55ca8, FUTEX_WAKE_PRIVATE, 1) = 0
          		 
          [pid 55681] [000014b6eb241f85] futex(0x14b6e9b55cfc, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194467, tv_nsec=25722000}, 0xffffffff <unfinished ...>
          		 
          [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb24241c] futex(0x14b6e9b9982c, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 55686] [000014b6eb241f85] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb24241c] <... futex resumed> ) = 1
          		 
          [pid 55686] [000014b6eb24510d] futex(0x14b6e9843b10, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...>
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1) = 1
          		 
          [pid 55686] [000014b6eb24510d] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb24241c] futex(0x14b6e9b9922c, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 55686] [000014b6eb24510d] futex(0x14b6e9843b10, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...>
          		 
          [pid 55678] [000014b6eb24241c] <... futex resumed> ) = 1
          		 
          [pid 58033] [000014b6eb241f85] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 58033] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 55686] [000014b6eb24510d] <... futex resumed> ) = 0
          		 
          [pid 58033] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 55686] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 1
          		 
          [pid 58033] [000014b6eb24510d] futex(0x560be5c49b00, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...>
          		 
          [pid 55686] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 58033] [000014b6eb24510d] <... futex resumed> ) = -1 EAGAIN (Resource temporarily unavailable)
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 58033] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 55686] [000014b6eb241f85] futex(0x14b6e9b99828, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194526, tv_nsec=32608276}, 0xffffffff <unfinished ...>
          		 
          [pid 58033] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 58033] [000014b6eb241f85] futex(0x14b6e9b99228, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194526, tv_nsec=32695727}, 0xffffffff <unfinished ...>
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194466, tv_nsec=268471000}, 0xffffffff) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194466, tv_nsec=668721000}, 0xffffffff <unfinished ...>
          		 
          [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0
          		 
          [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1,  <unfinished ...>
          		 
          [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194467, tv_nsec=32606000}, 0xffffffff <unfinished ...>
          		 
          [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0
          		 
          [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1,  <unfinished ...>
          		 
          [pid 55681] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55681] [000014b6eb2451aa] futex(0x14b6e9b55ca8, FUTEX_WAKE_PRIVATE, 1) = 0
          		 
          [pid 55681] [000014b6eb241f85] futex(0x14b6e9b55cfc, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194468, tv_nsec=26135000}, 0xffffffff <unfinished ...>
          		 
          [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb24241c] futex(0x14b6e9b99228, FUTEX_WAKE_PRIVATE, 1) = 1
          		 
          [pid 58033] [000014b6eb241f85] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb24241c] futex(0x14b6e9b99828, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 58033] [000014b6eb24510d] futex(0x14b6e9843b10, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...>
          		 
          [pid 55686] [000014b6eb241f85] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb24241c] <... futex resumed> ) = 1
          		 
          [pid 55686] [000014b6eb24510d] futex(0x14b6e9843b10, FUTEX_WAIT_PRIVATE, 2, NULL) = -1 EAGAIN (Resource temporarily unavailable)
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 55686] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 1
          		 
          [pid 58033] [000014b6eb24510d] <... futex resumed> ) = 0
          		 
          [pid 55686] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 58033] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 58033] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 55686] [000014b6eb241f85] futex(0x14b6e9b9982c, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194527, tv_nsec=33243459}, 0xffffffff <unfinished ...>
          		 
          [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 58033] [000014b6eb241f85] futex(0x14b6e9b9922c, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194527, tv_nsec=33271365}, 0xffffffff <unfinished ...>
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194467, tv_nsec=68977000}, 0xffffffff) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194467, tv_nsec=469189000}, 0xffffffff <unfinished ...>
          		 
          [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0
          		 
          [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1,  <unfinished ...>
          		 
          [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194467, tv_nsec=869475000}, 0xffffffff <unfinished ...>
          		 
          [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0
          		 
          [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1,  <unfinished ...>
          		 
          [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194468, tv_nsec=33241000}, 0xffffffff <unfinished ...>
          		 
          [pid 55681] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55681] [000014b6eb2451aa] futex(0x14b6e9b55ca8, FUTEX_WAKE_PRIVATE, 1) = 0
          		 
          [pid 55681] [000014b6eb241f85] futex(0x14b6e9b55cfc, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194469, tv_nsec=26499000}, 0xffffffff <unfinished ...>
          		 
          [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb24241c] futex(0x14b6e9b9922c, FUTEX_WAKE_PRIVATE, 1) = 1
          		 
          [pid 58033] [000014b6eb241f85] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb24241c] futex(0x14b6e9b9982c, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 58033] [000014b6eb24510d] futex(0x14b6e9843b10, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...>
          		 
          [pid 55678] [000014b6eb24241c] <... futex resumed> ) = 1
          		 
          [pid 55686] [000014b6eb241f85] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 55686] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 58033] [000014b6eb24510d] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 1
          		 
          [pid 58033] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 55686] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 58033] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 58033] [000014b6eb241f85] futex(0x14b6e9b99228, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194528, tv_nsec=33799081}, 0xffffffff <unfinished ...>
          		 
          [pid 55686] [000014b6eb241f85] futex(0x14b6e9b99828, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194528, tv_nsec=33796536}, 0xffffffff <unfinished ...>
          		 
          [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194468, tv_nsec=269734000}, 0xffffffff) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194468, tv_nsec=669990000}, 0xffffffff <unfinished ...>
          		 
          [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0
          		 
          [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1,  <unfinished ...>
          		 
          [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194469, tv_nsec=33795000}, 0xffffffff <unfinished ...>
          		 
          [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0
          		 
          [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1,  <unfinished ...>
          		 
          [pid 55681] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55681] [000014b6eb2451aa] futex(0x14b6e9b55ca8, FUTEX_WAKE_PRIVATE, 1) = 0
          		 
          [pid 55681] [000014b6eb241f85] futex(0x14b6e9b55cfc, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194470, tv_nsec=26888000}, 0xffffffff <unfinished ...>
          		 
          [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb24241c] futex(0x14b6e9b99228, FUTEX_WAKE_PRIVATE, 1) = 1
          		 
          [pid 58033] [000014b6eb241f85] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb24241c] futex(0x14b6e9b99828, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 58033] [000014b6eb24510d] futex(0x14b6e9843b10, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...>
          		 
          [pid 55678] [000014b6eb24241c] <... futex resumed> ) = 1
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 55686] [000014b6eb241f85] <... futex resumed> ) = 0
          		 
          [pid 58033] [000014b6eb24510d] <... futex resumed> ) = -1 EAGAIN (Resource temporarily unavailable)
          		 
          [pid 55686] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 58033] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 55686] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 58033] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 58033] [000014b6eb241f85] futex(0x14b6e9b9922c, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194529, tv_nsec=34358408}, 0xffffffff <unfinished ...>
          		 
          [pid 55686] [000014b6eb241f85] futex(0x14b6e9b9982c, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194529, tv_nsec=34357634}, 0xffffffff <unfinished ...>
          		 
          [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194469, tv_nsec=70256000}, 0xffffffff) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194469, tv_nsec=470467000}, 0xffffffff <unfinished ...>
          		 
          [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0
          		 
          [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1,  <unfinished ...>
          		 
          [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194469, tv_nsec=870746000}, 0xffffffff <unfinished ...>
          		 
          [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0
          		 
          [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1,  <unfinished ...>
          		 
          [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194469, tv_nsec=990963000}, 0xffffffff) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb24241c] futex(0x14b6e9b9922c, FUTEX_WAKE_PRIVATE, 1) = 1
          		 
          [pid 58033] [000014b6eb241f85] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 58033] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 58033] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194470, tv_nsec=34356000}, 0xffffffff <unfinished ...>
          		 
          [pid 58033] [000014b6eb241f85] futex(0x14b6e9b99228, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194529, tv_nsec=991484576}, 0xffffffff <unfinished ...>
          		 
          [pid 55681] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55681] [000014b6eb2451aa] futex(0x14b6e9b55ca8, FUTEX_WAKE_PRIVATE, 1) = 0
          		 
          [pid 55681] [000014b6eb241f85] futex(0x14b6e9b55cfc, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194471, tv_nsec=27308000}, 0xffffffff <unfinished ...>
          		 
          [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb24241c] futex(0x14b6e9b99228, FUTEX_WAKE_PRIVATE, 1) = 1
          		 
          [pid 58033] [000014b6eb241f85] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb24241c] futex(0x14b6e9b9982c, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 58033] [000014b6eb24510d] futex(0x14b6e9843b10, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...>
          		 
          [pid 55686] [000014b6eb241f85] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb24241c] <... futex resumed> ) = 1
          		 
          [pid 55686] [000014b6eb24510d] futex(0x14b6e9843b10, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...>
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 55686] [000014b6eb24510d] <... futex resumed> ) = -1 EAGAIN (Resource temporarily unavailable)
          		 
          [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 1
          		 
          [pid 58033] [000014b6eb24510d] <... futex resumed> ) = 0
          		 
          [pid 55686] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 58033] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 55686] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 58033] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 55686] [000014b6eb241f85] futex(0x14b6e9b99828, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194530, tv_nsec=34936204}, 0xffffffff <unfinished ...>
          		 
          [pid 58033] [000014b6eb241f85] futex(0x14b6e9b9922c, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194530, tv_nsec=34950196}, 0xffffffff <unfinished ...>
          		 
          [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194470, tv_nsec=270989000}, 0xffffffff) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194470, tv_nsec=671281000}, 0xffffffff <unfinished ...>
          		 
          [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0
          		 
          [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1,  <unfinished ...>
          		 
          [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194471, tv_nsec=34934000}, 0xffffffff <unfinished ...>
          		 
          [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0
          		 
          [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1,  <unfinished ...>
          		 
          [pid 55681] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55681] [000014b6eb2451aa] futex(0x14b6e9b55ca8, FUTEX_WAKE_PRIVATE, 1) = 0
          		 
          [pid 55681] [000014b6eb241f85] futex(0x14b6e9b55cfc, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194472, tv_nsec=27715000}, 0xffffffff <unfinished ...>
          		 
          [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb24241c] futex(0x14b6e9b9922c, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 58033] [000014b6eb241f85] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb24241c] <... futex resumed> ) = 1
          		 
          [pid 58033] [000014b6eb24510d] futex(0x14b6e9843b10, FUTEX_WAIT_PRIVATE, 2, NULL) = -1 EAGAIN (Resource temporarily unavailable)
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 58033] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 58033] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb24241c] futex(0x14b6e9b99828, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 58033] [000014b6eb24510d] futex(0x560be5c49b00, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...>
          		 
          [pid 55678] [000014b6eb24241c] <... futex resumed> ) = 1
          		 
          [pid 55686] [000014b6eb241f85] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 55686] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 58033] [000014b6eb24510d] <... futex resumed> ) = 0
          		 
          [pid 55686] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 58033] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 1
          		 
          [pid 58033] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 55686] [000014b6eb241f85] futex(0x14b6e9b9982c, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194531, tv_nsec=35495273}, 0xffffffff <unfinished ...>
          		 
          [pid 58033] [000014b6eb241f85] futex(0x14b6e9b99228, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194531, tv_nsec=35518237}, 0xffffffff <unfinished ...>
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194471, tv_nsec=71547000}, 0xffffffff) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194471, tv_nsec=471759000}, 0xffffffff <unfinished ...>
          		 
          [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0
          		 
          [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1,  <unfinished ...>
          		 
          [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194471, tv_nsec=872003000}, 0xffffffff <unfinished ...>
          		 
          [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0
          		 
          [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1,  <unfinished ...>
          		 
          [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194472, tv_nsec=35494000}, 0xffffffff <unfinished ...>
          		 
          [pid 55681] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55681] [000014b6eb2451aa] futex(0x14b6e9b55ca8, FUTEX_WAKE_PRIVATE, 1) = 0
          		 
          [pid 55681] [000014b6eb241f85] futex(0x14b6e9b55cfc, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194473, tv_nsec=28102000}, 0xffffffff <unfinished ...>
          		 
          [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb24241c] futex(0x14b6e9b99228, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 58033] [000014b6eb241f85] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb24241c] <... futex resumed> ) = 1
          		 
          [pid 58033] [000014b6eb24510d] futex(0x14b6e9843b10, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...>
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 58033] [000014b6eb24510d] <... futex resumed> ) = -1 EAGAIN (Resource temporarily unavailable)
          		 
          [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 58033] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 55678] [000014b6eb24241c] futex(0x14b6e9b9982c, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 58033] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb24241c] <... futex resumed> ) = 1
          		 
          [pid 58033] [000014b6eb24510d] futex(0x560be5c49b00, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...>
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 58033] [000014b6eb24510d] <... futex resumed> ) = -1 EAGAIN (Resource temporarily unavailable)
          		 
          [pid 55686] [000014b6eb241f85] <... futex resumed> ) = 0
          		 
          [pid 58033] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 55686] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 58033] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 55686] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 58033] [000014b6eb241f85] futex(0x14b6e9b9922c, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194532, tv_nsec=36151034}, 0xffffffff <unfinished ...>
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194472, tv_nsec=272227000}, 0xffffffff <unfinished ...>
          		 
          [pid 55686] [000014b6eb241f85] futex(0x14b6e9b99828, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194532, tv_nsec=36225752}, 0xffffffff <unfinished ...>
          		 
          [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194472, tv_nsec=672509000}, 0xffffffff <unfinished ...>
          		 
          [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0
          		 
          [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1,  <unfinished ...>
          		 
          [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194473, tv_nsec=36149000}, 0xffffffff <unfinished ...>
          		 
          [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0
          		 
          [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1,  <unfinished ...>
          		 
          [pid 55681] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55681] [000014b6eb2451aa] futex(0x14b6e9b55ca8, FUTEX_WAKE_PRIVATE, 1) = 0
          		 
          [pid 55681] [000014b6eb241f85] futex(0x14b6e9b55cfc, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194474, tv_nsec=28500000}, 0xffffffff <unfinished ...>
          		 
          [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb24241c] futex(0x14b6e9b99828, FUTEX_WAKE_PRIVATE, 1) = 1
          		 
          [pid 55686] [000014b6eb241f85] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb24241c] futex(0x14b6e9b9922c, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 55686] [000014b6eb24510d] futex(0x14b6e9843b10, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...>
          		 
          [pid 55678] [000014b6eb24241c] <... futex resumed> ) = 1
          		 
          [pid 58033] [000014b6eb241f85] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 58033] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 55686] [000014b6eb24510d] <... futex resumed> ) = 0
          		 
          [pid 58033] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 1
          		 
          [pid 55686] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 58033] [000014b6eb24510d] futex(0x560be5c49b00, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...>
          		 
          [pid 55686] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 58033] [000014b6eb24510d] <... futex resumed> ) = -1 EAGAIN (Resource temporarily unavailable)
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 58033] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
          		 
          [pid 55686] [000014b6eb241f85] futex(0x14b6e9b9982c, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194533, tv_nsec=36703998}, 0xffffffff <unfinished ...>
          		 
          [pid 58033] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 0
          		 
          [pid 58033] [000014b6eb241f85] futex(0x14b6e9b99228, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194533, tv_nsec=36783338}, 0xffffffff <unfinished ...>
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194473, tv_nsec=72767000}, 0xffffffff) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194473, tv_nsec=472993000}, 0xffffffff <unfinished ...>
          		 
          [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0
          		 
          [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1,  <unfinished ...>
          		 
          [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out)
          		 
          [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0
          		 
          [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194473, tv_nsec=873292000}, 0xffffffff^Cstrace: Process 55674 detached
          		 
          strace: Process 55678 detached
          		 
           <detached ...>
          		 
          strace: Process 55679 detached
          		 
          strace: Process 55680 detached
          		 
          strace: Process 55681 detached
          		 
          strace: Process 55686 detached
          		 
          strace: Process 55692 detached
          		 
          strace: Process 55693 detached
          		 
          strace: Process 55695 detached
          		 
          strace: Process 57112 detached
          		 
          strace: Process 58033 detached
          		 
          strace: Process 58275 detached

          Roel Roel Van de Paar added a comment - - edited short strace follow during hang $ sudo strace -if -p 55674 strace: Process 55674 attached with 12 threads [pid 58275] [000014b6eb24510d] futex(0x560be536c0a0, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...> [pid 58033] [000014b6eb241f85] restart_syscall(<... resuming interrupted futex ...> <unfinished ...> [pid 57112] [000014b6eb24510d] futex(0x560be536c0a0, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...> [pid 55695] [000014b6eb24510d] futex(0x560be536c0a0, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...> [pid 55693] [000014b6eb2419f3] futex(0x560be536eb4c, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...> [pid 55692] [000014b6ea55826c] rt_sigtimedwait([HUP QUIT ALRM TERM TSTP], <unfinished ...> [pid 55686] [000014b6eb241f85] restart_syscall(<... resuming interrupted futex ...> <unfinished ...> [pid 55681] [000014b6eb241f85] restart_syscall(<... resuming interrupted futex ...> <unfinished ...> [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1, <unfinished ...> [pid 55679] [000014b6eb241f85] restart_syscall(<... resuming interrupted futex ...> <unfinished ...> [pid 55678] [000014b6eb241f85] restart_syscall(<... resuming interrupted futex ...> <unfinished ...> [pid 55674] [000014b6ea62cbf9] restart_syscall(<... resuming interrupted restart_syscall ...> <unfinished ...> [pid 55678] [000014b6eb241f85] <... restart_syscall resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194459, tv_nsec=864239000}, 0xffffffff <unfinished ...> [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0 [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1, <unfinished ...> [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194459, tv_nsec=989966000}, 0xffffffff) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb24241c] futex(0x14b6e9b99828, FUTEX_WAKE_PRIVATE, 1) = 1 [pid 55686] [000014b6eb241f85] <... restart_syscall resumed> ) = 0 [pid 55686] [000014b6eb24510d] futex(0x14b6e9843b10, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...> [pid 55678] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 55686] [000014b6eb24510d] <... futex resumed> ) = -1 EAGAIN (Resource temporarily unavailable) [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 55686] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 55686] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 55686] [000014b6eb241f85] futex(0x14b6e9b9982c, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194519, tv_nsec=990474986}, 0xffffffff <unfinished ...> [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194460, tv_nsec=28221000}, 0xffffffff <unfinished ...> [pid 55681] [000014b6eb241f85] <... restart_syscall resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55681] [000014b6eb2451aa] futex(0x14b6e9b55ca8, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 55681] [000014b6eb241f85] futex(0x14b6e9b55cfc, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194461, tv_nsec=23288000}, 0xffffffff <unfinished ...> [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb24241c] futex(0x14b6e9b9982c, FUTEX_WAKE_PRIVATE, 1) = 1 [pid 55686] [000014b6eb241f85] <... futex resumed> ) = 0 [pid 55678] [000014b6eb24241c] futex(0x14b6e9b99228, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 55686] [000014b6eb24510d] futex(0x14b6e9843b10, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...> [pid 55678] [000014b6eb24241c] <... futex resumed> ) = 1 [pid 55678] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 58033] [000014b6eb241f85] <... restart_syscall resumed> ) = 0 [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 1 [pid 55686] [000014b6eb24510d] <... futex resumed> ) = 0 [pid 58033] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 55686] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 58033] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 55686] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 58033] [000014b6eb241f85] futex(0x14b6e9b9922c, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194520, tv_nsec=28803608}, 0xffffffff <unfinished ...> [pid 55686] [000014b6eb241f85] futex(0x14b6e9b99828, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194520, tv_nsec=28808954}, 0xffffffff <unfinished ...> [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194460, tv_nsec=264516000}, 0xffffffff) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194460, tv_nsec=664785000}, 0xffffffff <unfinished ...> [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0 [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1, <unfinished ...> [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194461, tv_nsec=28802000}, 0xffffffff <unfinished ...> [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0 [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1, <unfinished ...> [pid 55681] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55681] [000014b6eb2451aa] futex(0x14b6e9b55ca8, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 55681] [000014b6eb241f85] futex(0x14b6e9b55cfc, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194462, tv_nsec=23803000}, 0xffffffff <unfinished ...> [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb24241c] futex(0x14b6e9b99828, FUTEX_WAKE_PRIVATE, 1) = 1 [pid 55686] [000014b6eb241f85] <... futex resumed> ) = 0 [pid 55678] [000014b6eb24241c] futex(0x14b6e9b9922c, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 55686] [000014b6eb24510d] futex(0x14b6e9843b10, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...> [pid 55678] [000014b6eb24241c] <... futex resumed> ) = 1 [pid 58033] [000014b6eb241f85] <... futex resumed> ) = 0 [pid 55678] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 55686] [000014b6eb24510d] <... futex resumed> ) = -1 EAGAIN (Resource temporarily unavailable) [pid 58033] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 55686] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 58033] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 58033] [000014b6eb24510d] futex(0x560be5c49b00, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...> [pid 55686] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 58033] [000014b6eb24510d] <... futex resumed> ) = -1 EAGAIN (Resource temporarily unavailable) [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 58033] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 55686] [000014b6eb241f85] futex(0x14b6e9b9982c, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194521, tv_nsec=29437839}, 0xffffffff <unfinished ...> [pid 58033] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 58033] [000014b6eb241f85] futex(0x14b6e9b99228, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194521, tv_nsec=29509936}, 0xffffffff <unfinished ...> [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194461, tv_nsec=65090000}, 0xffffffff) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194461, tv_nsec=465350000}, 0xffffffff <unfinished ...> [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0 [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1, <unfinished ...> [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194461, tv_nsec=865626000}, 0xffffffff <unfinished ...> [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0 [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1, <unfinished ...> [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194462, tv_nsec=29436000}, 0xffffffff <unfinished ...> [pid 55681] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55681] [000014b6eb2451aa] futex(0x14b6e9b55ca8, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 55681] [000014b6eb241f85] futex(0x14b6e9b55cfc, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194463, tv_nsec=24234000}, 0xffffffff <unfinished ...> [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb24241c] futex(0x14b6e9b99228, FUTEX_WAKE_PRIVATE, 1) = 1 [pid 58033] [000014b6eb241f85] <... futex resumed> ) = 0 [pid 55678] [000014b6eb24241c] futex(0x14b6e9b9982c, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 58033] [000014b6eb24510d] futex(0x14b6e9843b10, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...> [pid 55686] [000014b6eb241f85] <... futex resumed> ) = 0 [pid 55678] [000014b6eb24241c] <... futex resumed> ) = 1 [pid 55686] [000014b6eb24510d] futex(0x14b6e9843b10, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...> [pid 55678] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 55686] [000014b6eb24510d] <... futex resumed> ) = -1 EAGAIN (Resource temporarily unavailable) [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 1 [pid 58033] [000014b6eb24510d] <... futex resumed> ) = 0 [pid 55686] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 58033] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 55686] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 58033] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 55686] [000014b6eb241f85] futex(0x14b6e9b99828, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194522, tv_nsec=30062397}, 0xffffffff <unfinished ...> [pid 58033] [000014b6eb241f85] futex(0x14b6e9b9922c, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194522, tv_nsec=30071555}, 0xffffffff <unfinished ...> [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194462, tv_nsec=265879000}, 0xffffffff) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194462, tv_nsec=666136000}, 0xffffffff <unfinished ...> [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0 [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1, <unfinished ...> [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194463, tv_nsec=30060000}, 0xffffffff <unfinished ...> [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0 [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1, <unfinished ...> [pid 55681] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55681] [000014b6eb2451aa] futex(0x14b6e9b55ca8, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 55681] [000014b6eb241f85] futex(0x14b6e9b55cfc, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194464, tv_nsec=24624000}, 0xffffffff <unfinished ...> [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb24241c] futex(0x14b6e9b9922c, FUTEX_WAKE_PRIVATE, 1) = 1 [pid 58033] [000014b6eb241f85] <... futex resumed> ) = 0 [pid 55678] [000014b6eb24241c] futex(0x14b6e9b99828, FUTEX_WAKE_PRIVATE, 1) = 1 [pid 58033] [000014b6eb24510d] futex(0x14b6e9843b10, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...> [pid 55686] [000014b6eb241f85] <... futex resumed> ) = 0 [pid 58033] [000014b6eb24510d] <... futex resumed> ) = -1 EAGAIN (Resource temporarily unavailable) [pid 55678] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 58033] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 55686] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 58033] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 55686] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 58033] [000014b6eb241f85] futex(0x14b6e9b99228, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194523, tv_nsec=30603348}, 0xffffffff <unfinished ...> [pid 55686] [000014b6eb241f85] futex(0x14b6e9b9982c, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194523, tv_nsec=30606120}, 0xffffffff <unfinished ...> [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194463, tv_nsec=66410000}, 0xffffffff) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194463, tv_nsec=466640000}, 0xffffffff <unfinished ...> [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0 [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1, <unfinished ...> [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194463, tv_nsec=866933000}, 0xffffffff <unfinished ...> [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0 [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1, <unfinished ...> [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194464, tv_nsec=30602000}, 0xffffffff <unfinished ...> [pid 55681] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55681] [000014b6eb2451aa] futex(0x14b6e9b55ca8, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 55681] [000014b6eb241f85] futex(0x14b6e9b55cfc, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194465, tv_nsec=24946000}, 0xffffffff <unfinished ...> [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb24241c] futex(0x14b6e9b9982c, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 55686] [000014b6eb241f85] <... futex resumed> ) = 0 [pid 55678] [000014b6eb24241c] <... futex resumed> ) = 1 [pid 55686] [000014b6eb24510d] futex(0x14b6e9843b10, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...> [pid 55678] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 55686] [000014b6eb24510d] <... futex resumed> ) = -1 EAGAIN (Resource temporarily unavailable) [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 55686] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 55678] [000014b6eb24241c] futex(0x14b6e9b99228, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 55686] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 55678] [000014b6eb24241c] <... futex resumed> ) = 1 [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 58033] [000014b6eb241f85] <... futex resumed> ) = 0 [pid 55686] [000014b6eb241f85] futex(0x14b6e9b99828, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194524, tv_nsec=31140293}, 0xffffffff <unfinished ...> [pid 58033] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 58033] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 58033] [000014b6eb241f85] futex(0x14b6e9b9922c, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194524, tv_nsec=31191770}, 0xffffffff <unfinished ...> [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194464, tv_nsec=267221000}, 0xffffffff) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194464, tv_nsec=667471000}, 0xffffffff <unfinished ...> [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0 [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1, <unfinished ...> [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194464, tv_nsec=990473000}, 0xffffffff <unfinished ...> [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0 [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1, <unfinished ...> [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb24241c] futex(0x14b6e9b9922c, FUTEX_WAKE_PRIVATE, 1) = 1 [pid 58033] [000014b6eb241f85] <... futex resumed> ) = 0 [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 58033] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 58033] [000014b6eb241f85] futex(0x14b6e9b99228, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194524, tv_nsec=990963940}, 0xffffffff <unfinished ...> [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194465, tv_nsec=31123000}, 0xffffffff <unfinished ...> [pid 55681] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55681] [000014b6eb2451aa] futex(0x14b6e9b55ca8, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 55681] [000014b6eb241f85] futex(0x14b6e9b55cfc, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194466, tv_nsec=25307000}, 0xffffffff <unfinished ...> [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb24241c] futex(0x14b6e9b99228, FUTEX_WAKE_PRIVATE, 1) = 1 [pid 58033] [000014b6eb241f85] <... futex resumed> ) = 0 [pid 55678] [000014b6eb24241c] futex(0x14b6e9b99828, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 58033] [000014b6eb24510d] futex(0x14b6e9843b10, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...> [pid 55678] [000014b6eb24241c] <... futex resumed> ) = 1 [pid 55686] [000014b6eb241f85] <... futex resumed> ) = 0 [pid 55678] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 55686] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 58033] [000014b6eb24510d] <... futex resumed> ) = 0 [pid 55686] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 58033] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 55686] [000014b6eb24510d] futex(0x560be5c49b00, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...> [pid 58033] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 1 [pid 58033] [000014b6eb24510d] futex(0x560be5c49b00, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...> [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 58033] [000014b6eb24510d] <... futex resumed> ) = -1 EAGAIN (Resource temporarily unavailable) [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 1 [pid 58033] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 55686] [000014b6eb24510d] <... futex resumed> ) = 0 [pid 58033] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 55686] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 58033] [000014b6eb241f85] futex(0x14b6e9b9922c, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194525, tv_nsec=31856264}, 0xffffffff <unfinished ...> [pid 55686] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194465, tv_nsec=67714000}, 0xffffffff <unfinished ...> [pid 55686] [000014b6eb241f85] futex(0x14b6e9b9982c, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194525, tv_nsec=31910626}, 0xffffffff <unfinished ...> [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194465, tv_nsec=467933000}, 0xffffffff <unfinished ...> [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0 [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1, <unfinished ...> [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194465, tv_nsec=868214000}, 0xffffffff <unfinished ...> [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0 [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1, <unfinished ...> [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194466, tv_nsec=31854000}, 0xffffffff <unfinished ...> [pid 55681] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55681] [000014b6eb2451aa] futex(0x14b6e9b55ca8, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 55681] [000014b6eb241f85] futex(0x14b6e9b55cfc, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194467, tv_nsec=25722000}, 0xffffffff <unfinished ...> [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb24241c] futex(0x14b6e9b9982c, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 55686] [000014b6eb241f85] <... futex resumed> ) = 0 [pid 55678] [000014b6eb24241c] <... futex resumed> ) = 1 [pid 55686] [000014b6eb24510d] futex(0x14b6e9843b10, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...> [pid 55678] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1) = 1 [pid 55686] [000014b6eb24510d] <... futex resumed> ) = 0 [pid 55678] [000014b6eb24241c] futex(0x14b6e9b9922c, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 55686] [000014b6eb24510d] futex(0x14b6e9843b10, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...> [pid 55678] [000014b6eb24241c] <... futex resumed> ) = 1 [pid 58033] [000014b6eb241f85] <... futex resumed> ) = 0 [pid 55678] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 58033] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 55686] [000014b6eb24510d] <... futex resumed> ) = 0 [pid 58033] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 55686] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 1 [pid 58033] [000014b6eb24510d] futex(0x560be5c49b00, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...> [pid 55686] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 58033] [000014b6eb24510d] <... futex resumed> ) = -1 EAGAIN (Resource temporarily unavailable) [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 58033] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 55686] [000014b6eb241f85] futex(0x14b6e9b99828, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194526, tv_nsec=32608276}, 0xffffffff <unfinished ...> [pid 58033] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 58033] [000014b6eb241f85] futex(0x14b6e9b99228, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194526, tv_nsec=32695727}, 0xffffffff <unfinished ...> [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194466, tv_nsec=268471000}, 0xffffffff) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194466, tv_nsec=668721000}, 0xffffffff <unfinished ...> [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0 [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1, <unfinished ...> [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194467, tv_nsec=32606000}, 0xffffffff <unfinished ...> [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0 [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1, <unfinished ...> [pid 55681] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55681] [000014b6eb2451aa] futex(0x14b6e9b55ca8, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 55681] [000014b6eb241f85] futex(0x14b6e9b55cfc, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194468, tv_nsec=26135000}, 0xffffffff <unfinished ...> [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb24241c] futex(0x14b6e9b99228, FUTEX_WAKE_PRIVATE, 1) = 1 [pid 58033] [000014b6eb241f85] <... futex resumed> ) = 0 [pid 55678] [000014b6eb24241c] futex(0x14b6e9b99828, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 58033] [000014b6eb24510d] futex(0x14b6e9843b10, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...> [pid 55686] [000014b6eb241f85] <... futex resumed> ) = 0 [pid 55678] [000014b6eb24241c] <... futex resumed> ) = 1 [pid 55686] [000014b6eb24510d] futex(0x14b6e9843b10, FUTEX_WAIT_PRIVATE, 2, NULL) = -1 EAGAIN (Resource temporarily unavailable) [pid 55678] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 55686] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 1 [pid 58033] [000014b6eb24510d] <... futex resumed> ) = 0 [pid 55686] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 58033] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 58033] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 55686] [000014b6eb241f85] futex(0x14b6e9b9982c, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194527, tv_nsec=33243459}, 0xffffffff <unfinished ...> [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 58033] [000014b6eb241f85] futex(0x14b6e9b9922c, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194527, tv_nsec=33271365}, 0xffffffff <unfinished ...> [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194467, tv_nsec=68977000}, 0xffffffff) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194467, tv_nsec=469189000}, 0xffffffff <unfinished ...> [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0 [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1, <unfinished ...> [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194467, tv_nsec=869475000}, 0xffffffff <unfinished ...> [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0 [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1, <unfinished ...> [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194468, tv_nsec=33241000}, 0xffffffff <unfinished ...> [pid 55681] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55681] [000014b6eb2451aa] futex(0x14b6e9b55ca8, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 55681] [000014b6eb241f85] futex(0x14b6e9b55cfc, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194469, tv_nsec=26499000}, 0xffffffff <unfinished ...> [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb24241c] futex(0x14b6e9b9922c, FUTEX_WAKE_PRIVATE, 1) = 1 [pid 58033] [000014b6eb241f85] <... futex resumed> ) = 0 [pid 55678] [000014b6eb24241c] futex(0x14b6e9b9982c, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 58033] [000014b6eb24510d] futex(0x14b6e9843b10, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...> [pid 55678] [000014b6eb24241c] <... futex resumed> ) = 1 [pid 55686] [000014b6eb241f85] <... futex resumed> ) = 0 [pid 55678] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 55686] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 58033] [000014b6eb24510d] <... futex resumed> ) = 0 [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 1 [pid 58033] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 55686] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 58033] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 58033] [000014b6eb241f85] futex(0x14b6e9b99228, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194528, tv_nsec=33799081}, 0xffffffff <unfinished ...> [pid 55686] [000014b6eb241f85] futex(0x14b6e9b99828, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194528, tv_nsec=33796536}, 0xffffffff <unfinished ...> [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194468, tv_nsec=269734000}, 0xffffffff) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194468, tv_nsec=669990000}, 0xffffffff <unfinished ...> [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0 [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1, <unfinished ...> [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194469, tv_nsec=33795000}, 0xffffffff <unfinished ...> [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0 [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1, <unfinished ...> [pid 55681] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55681] [000014b6eb2451aa] futex(0x14b6e9b55ca8, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 55681] [000014b6eb241f85] futex(0x14b6e9b55cfc, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194470, tv_nsec=26888000}, 0xffffffff <unfinished ...> [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb24241c] futex(0x14b6e9b99228, FUTEX_WAKE_PRIVATE, 1) = 1 [pid 58033] [000014b6eb241f85] <... futex resumed> ) = 0 [pid 55678] [000014b6eb24241c] futex(0x14b6e9b99828, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 58033] [000014b6eb24510d] futex(0x14b6e9843b10, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...> [pid 55678] [000014b6eb24241c] <... futex resumed> ) = 1 [pid 55678] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 55686] [000014b6eb241f85] <... futex resumed> ) = 0 [pid 58033] [000014b6eb24510d] <... futex resumed> ) = -1 EAGAIN (Resource temporarily unavailable) [pid 55686] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 58033] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 55686] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 58033] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 58033] [000014b6eb241f85] futex(0x14b6e9b9922c, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194529, tv_nsec=34358408}, 0xffffffff <unfinished ...> [pid 55686] [000014b6eb241f85] futex(0x14b6e9b9982c, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194529, tv_nsec=34357634}, 0xffffffff <unfinished ...> [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194469, tv_nsec=70256000}, 0xffffffff) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194469, tv_nsec=470467000}, 0xffffffff <unfinished ...> [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0 [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1, <unfinished ...> [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194469, tv_nsec=870746000}, 0xffffffff <unfinished ...> [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0 [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1, <unfinished ...> [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194469, tv_nsec=990963000}, 0xffffffff) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb24241c] futex(0x14b6e9b9922c, FUTEX_WAKE_PRIVATE, 1) = 1 [pid 58033] [000014b6eb241f85] <... futex resumed> ) = 0 [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 58033] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 58033] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194470, tv_nsec=34356000}, 0xffffffff <unfinished ...> [pid 58033] [000014b6eb241f85] futex(0x14b6e9b99228, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194529, tv_nsec=991484576}, 0xffffffff <unfinished ...> [pid 55681] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55681] [000014b6eb2451aa] futex(0x14b6e9b55ca8, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 55681] [000014b6eb241f85] futex(0x14b6e9b55cfc, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194471, tv_nsec=27308000}, 0xffffffff <unfinished ...> [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb24241c] futex(0x14b6e9b99228, FUTEX_WAKE_PRIVATE, 1) = 1 [pid 58033] [000014b6eb241f85] <... futex resumed> ) = 0 [pid 55678] [000014b6eb24241c] futex(0x14b6e9b9982c, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 58033] [000014b6eb24510d] futex(0x14b6e9843b10, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...> [pid 55686] [000014b6eb241f85] <... futex resumed> ) = 0 [pid 55678] [000014b6eb24241c] <... futex resumed> ) = 1 [pid 55686] [000014b6eb24510d] futex(0x14b6e9843b10, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...> [pid 55678] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 55686] [000014b6eb24510d] <... futex resumed> ) = -1 EAGAIN (Resource temporarily unavailable) [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 1 [pid 58033] [000014b6eb24510d] <... futex resumed> ) = 0 [pid 55686] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 58033] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 55686] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 58033] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 55686] [000014b6eb241f85] futex(0x14b6e9b99828, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194530, tv_nsec=34936204}, 0xffffffff <unfinished ...> [pid 58033] [000014b6eb241f85] futex(0x14b6e9b9922c, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194530, tv_nsec=34950196}, 0xffffffff <unfinished ...> [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194470, tv_nsec=270989000}, 0xffffffff) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194470, tv_nsec=671281000}, 0xffffffff <unfinished ...> [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0 [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1, <unfinished ...> [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194471, tv_nsec=34934000}, 0xffffffff <unfinished ...> [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0 [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1, <unfinished ...> [pid 55681] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55681] [000014b6eb2451aa] futex(0x14b6e9b55ca8, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 55681] [000014b6eb241f85] futex(0x14b6e9b55cfc, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194472, tv_nsec=27715000}, 0xffffffff <unfinished ...> [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb24241c] futex(0x14b6e9b9922c, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 58033] [000014b6eb241f85] <... futex resumed> ) = 0 [pid 55678] [000014b6eb24241c] <... futex resumed> ) = 1 [pid 58033] [000014b6eb24510d] futex(0x14b6e9843b10, FUTEX_WAIT_PRIVATE, 2, NULL) = -1 EAGAIN (Resource temporarily unavailable) [pid 55678] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 58033] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 58033] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 55678] [000014b6eb24241c] futex(0x14b6e9b99828, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 58033] [000014b6eb24510d] futex(0x560be5c49b00, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...> [pid 55678] [000014b6eb24241c] <... futex resumed> ) = 1 [pid 55686] [000014b6eb241f85] <... futex resumed> ) = 0 [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 55686] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 58033] [000014b6eb24510d] <... futex resumed> ) = 0 [pid 55686] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 58033] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 1 [pid 58033] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 55686] [000014b6eb241f85] futex(0x14b6e9b9982c, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194531, tv_nsec=35495273}, 0xffffffff <unfinished ...> [pid 58033] [000014b6eb241f85] futex(0x14b6e9b99228, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194531, tv_nsec=35518237}, 0xffffffff <unfinished ...> [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194471, tv_nsec=71547000}, 0xffffffff) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194471, tv_nsec=471759000}, 0xffffffff <unfinished ...> [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0 [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1, <unfinished ...> [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194471, tv_nsec=872003000}, 0xffffffff <unfinished ...> [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0 [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1, <unfinished ...> [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194472, tv_nsec=35494000}, 0xffffffff <unfinished ...> [pid 55681] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55681] [000014b6eb2451aa] futex(0x14b6e9b55ca8, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 55681] [000014b6eb241f85] futex(0x14b6e9b55cfc, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194473, tv_nsec=28102000}, 0xffffffff <unfinished ...> [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb24241c] futex(0x14b6e9b99228, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 58033] [000014b6eb241f85] <... futex resumed> ) = 0 [pid 55678] [000014b6eb24241c] <... futex resumed> ) = 1 [pid 58033] [000014b6eb24510d] futex(0x14b6e9843b10, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...> [pid 55678] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 58033] [000014b6eb24510d] <... futex resumed> ) = -1 EAGAIN (Resource temporarily unavailable) [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 58033] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 55678] [000014b6eb24241c] futex(0x14b6e9b9982c, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 58033] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 55678] [000014b6eb24241c] <... futex resumed> ) = 1 [pid 58033] [000014b6eb24510d] futex(0x560be5c49b00, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...> [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 58033] [000014b6eb24510d] <... futex resumed> ) = -1 EAGAIN (Resource temporarily unavailable) [pid 55686] [000014b6eb241f85] <... futex resumed> ) = 0 [pid 58033] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 55686] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 58033] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 55686] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 58033] [000014b6eb241f85] futex(0x14b6e9b9922c, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194532, tv_nsec=36151034}, 0xffffffff <unfinished ...> [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194472, tv_nsec=272227000}, 0xffffffff <unfinished ...> [pid 55686] [000014b6eb241f85] futex(0x14b6e9b99828, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194532, tv_nsec=36225752}, 0xffffffff <unfinished ...> [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194472, tv_nsec=672509000}, 0xffffffff <unfinished ...> [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0 [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1, <unfinished ...> [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194473, tv_nsec=36149000}, 0xffffffff <unfinished ...> [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0 [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1, <unfinished ...> [pid 55681] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55681] [000014b6eb2451aa] futex(0x14b6e9b55ca8, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 55681] [000014b6eb241f85] futex(0x14b6e9b55cfc, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194474, tv_nsec=28500000}, 0xffffffff <unfinished ...> [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb24241c] futex(0x14b6e9b99828, FUTEX_WAKE_PRIVATE, 1) = 1 [pid 55686] [000014b6eb241f85] <... futex resumed> ) = 0 [pid 55678] [000014b6eb24241c] futex(0x14b6e9b9922c, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 55686] [000014b6eb24510d] futex(0x14b6e9843b10, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...> [pid 55678] [000014b6eb24241c] <... futex resumed> ) = 1 [pid 58033] [000014b6eb241f85] <... futex resumed> ) = 0 [pid 55678] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 58033] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 55686] [000014b6eb24510d] <... futex resumed> ) = 0 [pid 58033] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 1 [pid 55686] [000014b6eb2451aa] futex(0x14b6e9843b10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 58033] [000014b6eb24510d] futex(0x560be5c49b00, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...> [pid 55686] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 58033] [000014b6eb24510d] <... futex resumed> ) = -1 EAGAIN (Resource temporarily unavailable) [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 58033] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 55686] [000014b6eb241f85] futex(0x14b6e9b9982c, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194533, tv_nsec=36703998}, 0xffffffff <unfinished ...> [pid 58033] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 55678] [000014b6eb2451aa] <... futex resumed> ) = 0 [pid 58033] [000014b6eb241f85] futex(0x14b6e9b99228, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194533, tv_nsec=36783338}, 0xffffffff <unfinished ...> [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194473, tv_nsec=72767000}, 0xffffffff) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194473, tv_nsec=472993000}, 0xffffffff <unfinished ...> [pid 55680] [000014b6eb45363a] <... io_getevents resumed> [], {tv_sec=0, tv_nsec=500000000}) = 0 [pid 55680] [000014b6eb45363a] io_getevents(0x14b6ebeab000, 1, 1, <unfinished ...> [pid 55678] [000014b6eb241f85] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 55678] [000014b6eb2451aa] futex(0x560be5c49b00, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 55678] [000014b6eb241f85] futex(0x560be5c49ae8, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1589194473, tv_nsec=873292000}, 0xffffffff^Cstrace: Process 55674 detached strace: Process 55678 detached <detached ...> strace: Process 55679 detached strace: Process 55680 detached strace: Process 55681 detached strace: Process 55686 detached strace: Process 55692 detached strace: Process 55693 detached strace: Process 55695 detached strace: Process 57112 detached strace: Process 58033 detached strace: Process 58275 detached
          Roel Roel Van de Paar added a comment - - edited

          Also noticed this in the error log;

          10.5.2 535c284aedddb6cc3bedba4a8877b501f456991e

          		 
          Version: '10.5.2-MariaDB-debug'  socket: '/test/MD180320-mariadb-10.5.2-linux-x86_64-dbg/socket.sock'  port: 16702  MariaDB Server
          		 
          safe_mutex: Trying to unlock mutex LOCK_global_system_variables that wasn't locked at /data/git/10.5_dbg/sql/sys_vars.cc, line 5335
          		 
          Last used at /data/git/10.5_dbg/sql/sys_vars_shared.h, line: 56
          		 
          200520  0:32:16 [ERROR] mysqld got signal 6 ;

          Roel Roel Van de Paar added a comment - - edited Also noticed this in the error log; 10.5.2 535c284aedddb6cc3bedba4a8877b501f456991e Version: '10.5.2-MariaDB-debug' socket: '/test/MD180320-mariadb-10.5.2-linux-x86_64-dbg/socket.sock' port: 16702 MariaDB Server safe_mutex: Trying to unlock mutex LOCK_global_system_variables that wasn't locked at /data/git/10.5_dbg/sql/sys_vars.cc, line 5335 Last used at /data/git/10.5_dbg/sql/sys_vars_shared.h, line: 56 200520 0:32:16 [ERROR] mysqld got signal 6 ;
          elenst Elena Stepanova added a comment -

          Here is another one:

          SET SESSION session_track_system_variables="sql_slave_skip_counter", sql_slave_skip_counter= 0;

          10.2 debug 7c5519c1

          		 
          safe_mutex: Trying to unlock mutex LOCK_global_system_variables that wasn't locked at /data/src/10.2/sql/sys_vars.cc, line 4723
          		 
          Last used at /data/src/10.2/sql/sql_class.cc, line: 1158
          		 
          200926 20:23:19 [ERROR] mysqld got signal 6 ;
          		 
           
          		 
          #5  0x00007f959a936859 in __GI_abort () at abort.c:79
          		 
          #6  0x000055d71ec376e9 in safe_mutex_unlock (mp=0x55d71f5acc00 <LOCK_global_system_variables>, file=0x55d71ecfa848 "/data/src/10.2/sql/sys_vars.cc", line=4723) at /data/src/10.2/mysys/thr_mutex.c:418
          		 
          #7  0x000055d71e375345 in inline_mysql_mutex_unlock (that=0x55d71f5acc00 <LOCK_global_system_variables>, src_file=0x55d71ecfa848 "/data/src/10.2/sql/sys_vars.cc", src_line=4723) at /data/src/10.2/include/mysql/psi/mysql_thread.h:754
          		 
          #8  0x000055d71e37a1b1 in Sys_var_multi_source_ulonglong::get_master_info_ulonglong_value (this=0x55d71f5cdb60 <Sys_slave_skip_counter>, thd=0x7f9584000d90, offset=18128) at /data/src/10.2/sql/sys_vars.cc:4723
          		 
          #9  0x000055d71e38f591 in Sys_var_multi_source_ulonglong::session_value_ptr (this=0x55d71f5cdb60 <Sys_slave_skip_counter>, thd=0x7f9584000d90, base=0x55d71ecc4150 <null_lex_str>) at /data/src/10.2/sql/sys_vars.ic:2258
          		 
          #10 0x000055d71e137a81 in sys_var::value_ptr (this=0x55d71f5cdb60 <Sys_slave_skip_counter>, thd=0x7f9584000d90, type=SHOW_OPT_SESSION, base=0x55d71ecc4150 <null_lex_str>) at /data/src/10.2/sql/set_var.cc:284
          		 
          #11 0x000055d71e2a592d in get_one_variable (thd=0x7f9584000d90, variable=0x7f9594aa1740, value_type=SHOW_OPT_SESSION, show_type=SHOW_ULONGLONG, status_var=0x0, charset=0x7f9594aa1700, buff=0x7f9594aa1760 "\320\f", length=0x7f9594aa1708) at /data/src/10.2/sql/sql_show.cc:3368
          		 
          #12 0x000055d71e134959 in Session_sysvars_tracker::store_variable (ptr=0x7f9584095b90, data_ptr=0x7f9594aa1ff0) at /data/src/10.2/sql/session_tracker.cc:775
          		 
          #13 0x000055d71ec0960f in my_hash_iterate (hash=0x7f95840081b0, action=0x55d71e1347c6 <Session_sysvars_tracker::store_variable(void*, void*)>, argument=0x7f9594aa1ff0) at /data/src/10.2/mysys/hash.c:802
          		 
          #14 0x000055d71e134b38 in Session_sysvars_tracker::vars_list::store (this=0x7f95840081b0, thd=0x7f9584000d90, buf=0x7f9594aa20f0) at /data/src/10.2/sql/session_tracker.cc:811
          		 
          #15 0x000055d71e134b91 in Session_sysvars_tracker::store (this=0x7f95840084b0, thd=0x7f9584000d90, buf=0x7f9594aa20f0) at /data/src/10.2/sql/session_tracker.cc:831
          		 
          #16 0x000055d71e136043 in Session_tracker::store (this=0x7f9584006260, thd=0x7f9584000d90, buf=0x7f9594aa20f0) at /data/src/10.2/sql/session_tracker.cc:1688
          		 
          #17 0x000055d71e1290c7 in net_send_ok (thd=0x7f9584000d90, server_status=16386, statement_warn_count=0, affected_rows=0, id=0, message=0x7f9584005f43 "", is_eof=false, skip_flush=false) at /data/src/10.2/sql/protocol.cc:283
          		 
          #18 0x000055d71e129be5 in Protocol::send_ok (this=0x7f9584001348, server_status=16386, statement_warn_count=0, affected_rows=0, last_insert_id=0, message=0x7f9584005f43 "", skip_flush=false) at /data/src/10.2/sql/protocol.cc:624
          		 
          #19 0x000055d71e129adf in Protocol::end_statement (this=0x7f9584001348) at /data/src/10.2/sql/protocol.cc:588
          		 
          #20 0x000055d71e206a50 in dispatch_command (command=COM_QUERY, thd=0x7f9584000d90, packet=0x7f9584008b51 "SET SESSION session_track_system_variables=\"sql_slave_skip_counter\", sql_slave_skip_counter= 0", packet_length=94, is_com_multi=false, is_next_command=false) at /data/src/10.2/sql/sql_parse.cc:2380
          		 
          #21 0x000055d71e203a51 in do_command (thd=0x7f9584000d90) at /data/src/10.2/sql/sql_parse.cc:1377
          		 
          #22 0x000055d71e35d695 in do_handle_one_connection (connect=0x55d721ad19d0) at /data/src/10.2/sql/sql_connect.cc:1336
          		 
          #23 0x000055d71e35d3fa in handle_one_connection (arg=0x55d721ad19d0) at /data/src/10.2/sql/sql_connect.cc:1241
          		 
          #24 0x000055d71eb81a6c in pfs_spawn_thread (arg=0x55d721ada5a0) at /data/src/10.2/storage/perfschema/pfs.cc:1869
          		 
          #25 0x00007f959ae59609 in start_thread (arg=<optimized out>) at pthread_create.c:477
          		 
          #26 0x00007f959aa33103 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

          10.2 non-debug 7c5519c1 - Hangs

          		 
          Thread 6 (Thread 0x7efec8674700 (LWP 3598224)):
          		 
          #0  __lll_lock_wait (futex=futex@entry=0x5641b75ed240 <LOCK_global_system_variables>, private=0) at lowlevellock.c:52
          		 
          #1  0x00007efece22d235 in __GI___pthread_mutex_lock (mutex=mutex@entry=0x5641b75ed240 <LOCK_global_system_variables>) at ../nptl/pthread_mutex_lock.c:135
          		 
          #2  0x00005641b67ab5c4 in inline_mysql_mutex_lock (that=that@entry=0x5641b75ed240 <LOCK_global_system_variables>, src_line=src_line@entry=1158, src_file=0x5641b6f7f868 "/data/src/10.2/sql/sql_class.cc") at /data/src/10.2/include/mysql/psi/mysql_thread.h:675
          		 
          #3  0x00005641b67affe2 in THD::init (this=this@entry=0x7efeac000c48) at /data/src/10.2/sql/sql_class.cc:1158
          		 
          #4  0x00005641b67b4059 in THD::change_user (this=this@entry=0x7efeac000c48) at /data/src/10.2/sql/sql_class.cc:1348
          		 
          #5  0x00005641b67b418d in THD::reset_for_reuse (this=this@entry=0x7efeac000c48) at /data/src/10.2/sql/sql_class.cc:1473
          		 
          #6  0x00005641b68c73f8 in CONNECT::create_thd (this=this@entry=0x5641b8ec7088, thd=thd@entry=0x7efeac000c48) at /data/src/10.2/sql/sql_connect.cc:1432
          		 
          #7  0x00005641b67414ae in cache_thread (thd=0x7efeac000c48) at /data/src/10.2/sql/mysqld.cc:2996
          		 
          #8  one_thread_per_connection_end (thd=0x7efeac000c48, put_in_cache=<optimized out>) at /data/src/10.2/sql/mysqld.cc:3062
          		 
          #9  0x00005641b68c77ae in do_handle_one_connection (connect=connect@entry=0x5641b8e5c6f8) at /data/src/10.2/sql/sql_connect.cc:1355
          		 
          #10 0x00005641b68c79ef in handle_one_connection (arg=arg@entry=0x5641b8e5c6f8) at /data/src/10.2/sql/sql_connect.cc:1241
          		 
          #11 0x00005641b6e5e9b6 in pfs_spawn_thread (arg=0x5641b8e67e38) at /data/src/10.2/storage/perfschema/pfs.cc:1869
          		 
          #12 0x00007efece22a609 in start_thread (arg=<optimized out>) at pthread_create.c:477
          		 
          #13 0x00007efecde1f103 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

          elenst Elena Stepanova added a comment - Here is another one: SET SESSION session_track_system_variables= "sql_slave_skip_counter" , sql_slave_skip_counter= 0; 10.2 debug 7c5519c1 safe_mutex: Trying to unlock mutex LOCK_global_system_variables that wasn't locked at /data/src/10.2/sql/sys_vars.cc, line 4723 Last used at /data/src/10.2/sql/sql_class.cc, line: 1158 200926 20:23:19 [ERROR] mysqld got signal 6 ;   #5 0x00007f959a936859 in __GI_abort () at abort.c:79 #6 0x000055d71ec376e9 in safe_mutex_unlock (mp=0x55d71f5acc00 <LOCK_global_system_variables>, file=0x55d71ecfa848 "/data/src/10.2/sql/sys_vars.cc", line=4723) at /data/src/10.2/mysys/thr_mutex.c:418 #7 0x000055d71e375345 in inline_mysql_mutex_unlock (that=0x55d71f5acc00 <LOCK_global_system_variables>, src_file=0x55d71ecfa848 "/data/src/10.2/sql/sys_vars.cc", src_line=4723) at /data/src/10.2/include/mysql/psi/mysql_thread.h:754 #8 0x000055d71e37a1b1 in Sys_var_multi_source_ulonglong::get_master_info_ulonglong_value (this=0x55d71f5cdb60 <Sys_slave_skip_counter>, thd=0x7f9584000d90, offset=18128) at /data/src/10.2/sql/sys_vars.cc:4723 #9 0x000055d71e38f591 in Sys_var_multi_source_ulonglong::session_value_ptr (this=0x55d71f5cdb60 <Sys_slave_skip_counter>, thd=0x7f9584000d90, base=0x55d71ecc4150 <null_lex_str>) at /data/src/10.2/sql/sys_vars.ic:2258 #10 0x000055d71e137a81 in sys_var::value_ptr (this=0x55d71f5cdb60 <Sys_slave_skip_counter>, thd=0x7f9584000d90, type=SHOW_OPT_SESSION, base=0x55d71ecc4150 <null_lex_str>) at /data/src/10.2/sql/set_var.cc:284 #11 0x000055d71e2a592d in get_one_variable (thd=0x7f9584000d90, variable=0x7f9594aa1740, value_type=SHOW_OPT_SESSION, show_type=SHOW_ULONGLONG, status_var=0x0, charset=0x7f9594aa1700, buff=0x7f9594aa1760 "\320\f", length=0x7f9594aa1708) at /data/src/10.2/sql/sql_show.cc:3368 #12 0x000055d71e134959 in Session_sysvars_tracker::store_variable (ptr=0x7f9584095b90, data_ptr=0x7f9594aa1ff0) at /data/src/10.2/sql/session_tracker.cc:775 #13 0x000055d71ec0960f in my_hash_iterate (hash=0x7f95840081b0, action=0x55d71e1347c6 <Session_sysvars_tracker::store_variable(void*, void*)>, argument=0x7f9594aa1ff0) at /data/src/10.2/mysys/hash.c:802 #14 0x000055d71e134b38 in Session_sysvars_tracker::vars_list::store (this=0x7f95840081b0, thd=0x7f9584000d90, buf=0x7f9594aa20f0) at /data/src/10.2/sql/session_tracker.cc:811 #15 0x000055d71e134b91 in Session_sysvars_tracker::store (this=0x7f95840084b0, thd=0x7f9584000d90, buf=0x7f9594aa20f0) at /data/src/10.2/sql/session_tracker.cc:831 #16 0x000055d71e136043 in Session_tracker::store (this=0x7f9584006260, thd=0x7f9584000d90, buf=0x7f9594aa20f0) at /data/src/10.2/sql/session_tracker.cc:1688 #17 0x000055d71e1290c7 in net_send_ok (thd=0x7f9584000d90, server_status=16386, statement_warn_count=0, affected_rows=0, id=0, message=0x7f9584005f43 "", is_eof=false, skip_flush=false) at /data/src/10.2/sql/protocol.cc:283 #18 0x000055d71e129be5 in Protocol::send_ok (this=0x7f9584001348, server_status=16386, statement_warn_count=0, affected_rows=0, last_insert_id=0, message=0x7f9584005f43 "", skip_flush=false) at /data/src/10.2/sql/protocol.cc:624 #19 0x000055d71e129adf in Protocol::end_statement (this=0x7f9584001348) at /data/src/10.2/sql/protocol.cc:588 #20 0x000055d71e206a50 in dispatch_command (command=COM_QUERY, thd=0x7f9584000d90, packet=0x7f9584008b51 "SET SESSION session_track_system_variables=\"sql_slave_skip_counter\", sql_slave_skip_counter= 0", packet_length=94, is_com_multi=false, is_next_command=false) at /data/src/10.2/sql/sql_parse.cc:2380 #21 0x000055d71e203a51 in do_command (thd=0x7f9584000d90) at /data/src/10.2/sql/sql_parse.cc:1377 #22 0x000055d71e35d695 in do_handle_one_connection (connect=0x55d721ad19d0) at /data/src/10.2/sql/sql_connect.cc:1336 #23 0x000055d71e35d3fa in handle_one_connection (arg=0x55d721ad19d0) at /data/src/10.2/sql/sql_connect.cc:1241 #24 0x000055d71eb81a6c in pfs_spawn_thread (arg=0x55d721ada5a0) at /data/src/10.2/storage/perfschema/pfs.cc:1869 #25 0x00007f959ae59609 in start_thread (arg=<optimized out>) at pthread_create.c:477 #26 0x00007f959aa33103 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 10.2 non-debug 7c5519c1 - Hangs Thread 6 (Thread 0x7efec8674700 (LWP 3598224)): #0 __lll_lock_wait (futex=futex@entry=0x5641b75ed240 <LOCK_global_system_variables>, private=0) at lowlevellock.c:52 #1 0x00007efece22d235 in __GI___pthread_mutex_lock (mutex=mutex@entry=0x5641b75ed240 <LOCK_global_system_variables>) at ../nptl/pthread_mutex_lock.c:135 #2 0x00005641b67ab5c4 in inline_mysql_mutex_lock (that=that@entry=0x5641b75ed240 <LOCK_global_system_variables>, src_line=src_line@entry=1158, src_file=0x5641b6f7f868 "/data/src/10.2/sql/sql_class.cc") at /data/src/10.2/include/mysql/psi/mysql_thread.h:675 #3 0x00005641b67affe2 in THD::init (this=this@entry=0x7efeac000c48) at /data/src/10.2/sql/sql_class.cc:1158 #4 0x00005641b67b4059 in THD::change_user (this=this@entry=0x7efeac000c48) at /data/src/10.2/sql/sql_class.cc:1348 #5 0x00005641b67b418d in THD::reset_for_reuse (this=this@entry=0x7efeac000c48) at /data/src/10.2/sql/sql_class.cc:1473 #6 0x00005641b68c73f8 in CONNECT::create_thd (this=this@entry=0x5641b8ec7088, thd=thd@entry=0x7efeac000c48) at /data/src/10.2/sql/sql_connect.cc:1432 #7 0x00005641b67414ae in cache_thread (thd=0x7efeac000c48) at /data/src/10.2/sql/mysqld.cc:2996 #8 one_thread_per_connection_end (thd=0x7efeac000c48, put_in_cache=<optimized out>) at /data/src/10.2/sql/mysqld.cc:3062 #9 0x00005641b68c77ae in do_handle_one_connection (connect=connect@entry=0x5641b8e5c6f8) at /data/src/10.2/sql/sql_connect.cc:1355 #10 0x00005641b68c79ef in handle_one_connection (arg=arg@entry=0x5641b8e5c6f8) at /data/src/10.2/sql/sql_connect.cc:1241 #11 0x00005641b6e5e9b6 in pfs_spawn_thread (arg=0x5641b8e67e38) at /data/src/10.2/storage/perfschema/pfs.cc:1869 #12 0x00007efece22a609 in start_thread (arg=<optimized out>) at pthread_create.c:477 #13 0x00007efecde1f103 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
          holyfoot Alexey Botchkov added a comment -

          https://github.com/MariaDB/server/commit/d3a13446d55b3f1632a75622d796a8de6027dd7d

          The problem there is in replication-related variables when the SESSION variable behaves like GLOBAL. (See the Sys_var_multi_source_ulonglong for instance).
          I think the patch is correct considering how things are done now. Similar locking is done in show_status_array() (another place where the get_one_variable() is used).
          To fix it differently we have to reengineer the Sys_var_multi_source_ulonglong i suspect.

          holyfoot Alexey Botchkov added a comment - https://github.com/MariaDB/server/commit/d3a13446d55b3f1632a75622d796a8de6027dd7d The problem there is in replication-related variables when the SESSION variable behaves like GLOBAL. (See the Sys_var_multi_source_ulonglong for instance). I think the patch is correct considering how things are done now. Similar locking is done in show_status_array() (another place where the get_one_variable() is used). To fix it differently we have to reengineer the Sys_var_multi_source_ulonglong i suspect.
          sanja Oleksandr Byelkin added a comment -

          OK to push

          sanja Oleksandr Byelkin added a comment - OK to push

          People

            holyfoot Alexey Botchkov
            Roel Roel Van de Paar
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