Galera test failure on galera_concurrent_ctas

alera.galera_concurrent_ctas 'innodb'   w1 [ fail ]  timeout after 900 seconds

        Test ended at 2021-02-08 15:29:26

Test case timeout after 900 seconds

== /dev/shm/var/1/log/galera_concurrent_ctas.log == 

 == /dev/shm/var/1/tmp/analyze-timeout-mysqld.1.err ==

mysqltest: Could not open connection 'default' after 500 attempts: 2002 Can't connect to local MySQL server through socket '/dev/shm/var/tmp/1/mysqld.1.sock' (111)

 == /dev/shm/var/1/tmp/analyze-timeout-mysqld.2.err ==

mysqltest: Could not open connection 'default' after 500 attempts: 2002 Can't connect to local MySQL server through socket '/dev/shm/var/tmp/1/mysqld.2.sock' (111)

 - found 'core' (0/0)

Trying 'dbx' to get a backtrace

Trying 'gdb' to get a backtrace from coredump /dev/shm/var/1/log/galera.galera_concurrent_ctas-innodb/mysqld.2/data/core

Core generated by '/usr/sbin/mysqld'

Output from gdb follows. The first stack trace is from the failing thread.

The following stack traces are from all threads (so the failing one is

duplicated).

--------------------------

[New LWP 2572]

[New LWP 2755]

[New LWP 2574]

[New LWP 2768]

[New LWP 2578]

[New LWP 2754]

[New LWP 2579]

[New LWP 2775]

[New LWP 2758]

[New LWP 2756]

[New LWP 2575]

[New LWP 2764]

[New LWP 2577]

[New LWP 2770]

[New LWP 2759]

[New LWP 2765]

[New LWP 2773]

[New LWP 2757]

[New LWP 2779]

[New LWP 2763]

[New LWP 2778]

[New LWP 2777]

[New LWP 2767]

[New LWP 2766]

[New LWP 2576]

[New LWP 2769]

[New LWP 2760]

[New LWP 2771]

[New LWP 2772]

[New LWP 2774]

[New LWP 2776]

[New LWP 2782]

[New LWP 3584]

[Thread debugging using libthread_db enabled]

Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".

Core was generated by `/usr/sbin/mysqld --defaults-group-suffix=.2 --defaults-file=/dev/shm/var/1/my.c'.

Program terminated with signal SIGABRT, Aborted.

#0  0xb7703cf9 in __kernel_vsyscall ()

[Current thread is 1 (Thread 0xb6da17c0 (LWP 2572))]

#0  0xb7703cf9 in __kernel_vsyscall ()

#1  0xb76e8e41 in __pthread_kill (threadid=3067746240, signo=6) at ../sysdeps/unix/sysv/linux/pthread_kill.c:55

#2  0x80aa695c in my_write_core (sig=6) at ./mysys/stacktrace.c:382

#3  0x8051c00b in handle_fatal_signal (sig=6) at ./sql/signal_handler.cc:343

#4  <signal handler called>

#5  0xb7703cf9 in __kernel_vsyscall ()

#6  0xb706246f in poll () at ../sysdeps/unix/syscall-template.S:84

#7  0xb707c6a0 in __poll_chk (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>, fdslen=24) at poll_chk.c:27

#8  0x802bd5f1 in poll (__timeout=-1, __nfds=2, __fds=0xbf897f10) at /usr/include/i386-linux-gnu/bits/poll2.h:41

#9  handle_connections_sockets () at ./sql/mysqld.cc:6724

#10 0x802bf1ea in mysqld_main (argc=<optimized out>, argv=<optimized out>) at ./sql/mysqld.cc:6192

#11 0x8029f627 in main (argc=22, argv=0xbf898204) at ./sql/main.cc:25

Thread 33 (Thread 0xa6269b40 (LWP 3584)):

#0  0xb7703cf9 in __kernel_vsyscall ()

#1  0xb76e7beb in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/i386/pthread_cond_wait.S:187

#2  0xb20a9a9f in gu::Lock::wait (this=0xa6266f7c, cond=...) at ./galerautils/src/gu_lock.hpp:59

#3  galera::Monitor<galera::ReplicatorSMM::LocalOrder>::enter (this=0x81dc0934, obj=...) at ./galera/src/monitor.hpp:124

#4  0xb209af47 in galera::ReplicatorSMM::cert (trx=0xb2384228, this=0x81dc0108) at ./galera/src/replicator_smm.cpp:1747

#5  galera::ReplicatorSMM::cert_and_catch (this=0x81dc0108, trx=0xb2384228) at ./galera/src/replicator_smm.cpp:1850

#6  0xb209b862 in galera::ReplicatorSMM::pre_commit (this=0x81dc0108, trx=0xb2384228, meta=0xa6e171cc) at ./galera/src/replicator_smm.cpp:758

#7  0xb2071370 in galera_pre_commit (gh=0x81d9bdf0, conn_id=210, trx_handle=0xa6e171f8, flags=9, meta=0xa6e171cc) at ./galera/src/wsrep_provider.cpp:518

#8  0x804a6dce in wsrep_run_wsrep_commit (thd=0xa6e13c80, all=false) at ./sql/wsrep_hton.cc:509

#9  0x804a78ff in wsrep_prepare (hton=0x81de1ec0, thd=0xa6e13c80, all=false) at ./sql/wsrep_hton.cc:220

#10 0x8051f5f7 in prepare_or_error (all=<optimized out>, thd=0xa6e13c80, ht=0x81de1ec0) at ./sql/handler.cc:1196

#11 ha_commit_trans (thd=0xa6e13c80, all=false) at ./sql/handler.cc:1475

#12 0x80452d92 in trans_commit_stmt (thd=0xa6e13c80) at ./sql/transaction.cc:510

#13 0x803449aa in select_create::send_eof (this=0xa6e20a80) at ./sql/sql_insert.cc:4590

#14 0x803baf5f in JOIN::exec_inner (this=0xa6e20b20) at ./sql/sql_select.cc:3529

#15 0x803bb52a in JOIN::exec (this=0xa6e20b20) at ./sql/sql_select.cc:3437

#16 0x803bb694 in mysql_select (thd=<optimized out>, tables=<optimized out>, wild_num=<optimized out>, fields=..., conds=<optimized out>, og_num=<optimized out>, order=<optimized out>, group=<optimized out>, having=<optimized out>, proc_param=<optimized out>, select_options=<optimized out>, result=<optimized out>, unit=<optimized out>, select_lex=<optimized out>) at ./sql/sql_select.cc:3837

#17 0x803bc002 in handle_select (thd=0xa6e13c80, lex=0xa6e160a4, result=0xa6e20a80, setup_tables_done_option=0) at ./sql/sql_select.cc:361

#18 0x803f1353 in Sql_cmd_create_table::execute (this=0xa6e20308, thd=0xa6e13c80) at ./sql/sql_table.cc:10949

#19 0x80361aa3 in mysql_execute_command (thd=<optimized out>) at ./sql/sql_parse.cc:5994

#20 0x803684b7 in mysql_parse (thd=0xa6e13c80, rawbuf=0xa6e20248 "CREATE table t1 as SELECT SLEEP(0)", length=34, parser_state=0xa6268b60, is_com_multi=false, is_next_command=false) at ./sql/sql_parse.cc:7763

#21 0x80368e30 in wsrep_mysql_parse (thd=thd@entry=0xa6e13c80, rawbuf=0xa6e20248 "CREATE table t1 as SELECT SLEEP(0)", length=34, parser_state=0xa6268b60, is_com_multi=false, is_next_command=false) at ./sql/sql_parse.cc:7556

#22 0x8036c09f in dispatch_command (command=<optimized out>, thd=<optimized out>, packet=<optimized out>, packet_length=<optimized out>, is_com_multi=<optimized out>, is_next_command=<optimized out>) at ./sql/sql_parse.cc:1825

#23 0x8036c549 in do_command (thd=0xa6e13c80) at ./sql/sql_parse.cc:1381

#24 0x80443359 in do_handle_one_connection (connect=0x82049f40) at ./sql/sql_connect.cc:1336

#25 0x80443532 in handle_one_connection (arg=0x82049f40) at ./sql/sql_connect.cc:1241

#26 0x80a597db in pfs_spawn_thread (arg=<optimized out>) at ./storage/perfschema/pfs.cc:1869

#27 0xb76e227a in start_thread (arg=0xa6269b40) at pthread_create.c:456

#28 0xb706c366 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:110

Thread 32 (Thread 0xa62b4b40 (LWP 2782)):

#0  0xb7703cf9 in __kernel_vsyscall ()

#1  0xb76e7fb5 in pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/i386/i686/../pthread_cond_timedwait.S:245

#2  0x802b4f91 in inline_mysql_cond_timedwait (src_file=0x80b21ba8 "/home/buildbot/buildbot/build/mariadb-10.2.37/sql/mysqld.cc", src_line=3021, abstime=0xa62b4174, mutex=0x81106010 <LOCK_thread_cache>, that=0x81107dc0 <COND_thread_cache>) at ./include/mysql/psi/mysql_thread.h:1182

#3  cache_thread (thd=0xb23048a0) at ./sql/mysqld.cc:3020

#4  one_thread_per_connection_end (thd=0xb23048a0, put_in_cache=true) at ./sql/mysqld.cc:3109

#5  0x804432e2 in do_handle_one_connection (connect=0x8203be38) at ./sql/sql_connect.cc:1355

#6  0x80443532 in handle_one_connection (arg=0x8203be38) at ./sql/sql_connect.cc:1241

#7  0x80a597db in pfs_spawn_thread (arg=<optimized out>) at ./storage/perfschema/pfs.cc:1869

#8  0xb76e227a in start_thread (arg=0xa62b4b40) at pthread_create.c:456

#9  0xb706c366 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:110

Thread 31 (Thread 0x9b6c8b40 (LWP 2776)):

#0  0xb7703cf9 in __kernel_vsyscall ()

#1  0xb76e7beb in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/i386/pthread_cond_wait.S:187

#2  0x8069fbf4 in inline_mysql_cond_wait (src_file=0x80bd5bc0 "/home/buildbot/buildbot/build/mariadb-10.2.37/storage/innobase/handler/ha_innodb.cc", src_line=348, mutex=0x9b6c81fc, that=0x9b6c8218) at ./include/mysql/psi/mysql_thread.h:1156

#3  thd_destructor_proxy () at ./storage/innobase/handler/ha_innodb.cc:348

#4  0x80a597db in pfs_spawn_thread (arg=<optimized out>) at ./storage/perfschema/pfs.cc:1869

#5  0xb76e227a in start_thread (arg=0x9b6c8b40) at pthread_create.c:456

#6  0xb706c366 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:110

Thread 30 (Thread 0x9c6cab40 (LWP 2774)):

#0  0xb7703cf9 in __kernel_vsyscall ()

#1  0xb76eb7fa in nanosleep () at ../sysdeps/unix/syscall-template.S:84

#2  0x80727200 in os_thread_sleep (tm=1000000) at ./storage/innobase/os/os0thread.cc:231

#3  0x80849d4f in btr_defragment_thread () at ./storage/innobase/btr/btr0defragment.cc:722

#4  0xb76e227a in start_thread (arg=0x9c6cab40) at pthread_create.c:456

#5  0xb706c366 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:110

Thread 29 (Thread 0x9d6ccb40 (LWP 2772)):

#0  0xb7703cf9 in __kernel_vsyscall ()

#1  0xb76e7beb in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/i386/pthread_cond_wait.S:187

#2  0x80726e39 in os_event::wait (this=0x81e909e8) at ./storage/innobase/os/os0event.cc:158

#3  os_event::wait_low (reset_sig_count=1066, this=0x81e909e8) at ./storage/innobase/os/os0event.cc:325

#4  os_event_wait_low (event=0x81e909e8, reset_sig_count=0) at ./storage/innobase/os/os0event.cc:507

#5  0x807becdc in srv_resume_thread (sig_count=0, timeout_usec=0, wait=true, slot=0x810a14c4 <srv_sys+196>) at ./storage/innobase/srv/srv0srv.cc:937

#6  srv_worker_thread (arg=<optimized out>) at ./storage/innobase/srv/srv0srv.cc:2617

#7  0xb76e227a in start_thread (arg=0x9d6ccb40) at pthread_create.c:456

#8  0xb706c366 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:110

Thread 28 (Thread 0x9decdb40 (LWP 2771)):

#0  0xb7703cf9 in __kernel_vsyscall ()

#1  0xb76e7beb in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/i386/pthread_cond_wait.S:187

#2  0x80726e39 in os_event::wait (this=0x81e90990) at ./storage/innobase/os/os0event.cc:158

#3  os_event::wait_low (reset_sig_count=891, this=0x81e90990) at ./storage/innobase/os/os0event.cc:325

#4  os_event_wait_low (event=0x81e90990, reset_sig_count=0) at ./storage/innobase/os/os0event.cc:507

#5  0x807becdc in srv_resume_thread (sig_count=0, timeout_usec=0, wait=true, slot=0x810a14a8 <srv_sys+168>) at ./storage/innobase/srv/srv0srv.cc:937

#6  srv_worker_thread (arg=<optimized out>) at ./storage/innobase/srv/srv0srv.cc:2617

#7  0xb76e227a in start_thread (arg=0x9decdb40) at pthread_create.c:456

#8  0xb706c366 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:110

Thread 27 (Thread 0xa28dbb40 (LWP 2760)):

#0  0xb7703cf9 in __kernel_vsyscall ()

#1  0xb76e7fb5 in pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/i386/i686/../pthread_cond_timedwait.S:245

#2  0x807267cb in os_event::timed_wait (abstime=0xa28daf6c, this=0x81e90b48) at ./storage/innobase/os/os0event.cc:275

#3  os_event::wait_time_low (this=0x81e90b48, time_in_usec=1000000, reset_sig_count=999) at ./storage/innobase/os/os0event.cc:385

#4  0x80726dc9 in os_event_wait_time_low (event=0x81e90b48, time_in_usec=1000000, reset_sig_count=999) at ./storage/innobase/os/os0event.cc:490

#5  0x8086bb9d in pc_sleep_if_needed (cur_time=1078109, sig_count=999, next_loop_time=1079109) at ./storage/innobase/buf/buf0flu.cc:2683

#6  buf_flush_page_cleaner_coordinator () at ./storage/innobase/buf/buf0flu.cc:3149

#7  0xb76e227a in start_thread (arg=0xa28dbb40) at pthread_create.c:456

#8  0xb706c366 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:110

Thread 26 (Thread 0x9eecfb40 (LWP 2769)):

#0  0xb7703cf9 in __kernel_vsyscall ()

#1  0xb76e7beb in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/i386/pthread_cond_wait.S:187

#2  0x80726e39 in os_event::wait (this=0x81e908e0) at ./storage/innobase/os/os0event.cc:158

#3  os_event::wait_low (reset_sig_count=498, this=0x81e908e0) at ./storage/innobase/os/os0event.cc:325

#4  os_event_wait_low (event=0x81e908e0, reset_sig_count=498) at ./storage/innobase/os/os0event.cc:507

#5  0x807c01a6 in srv_resume_thread (timeout_usec=0, wait=true, sig_count=498, slot=0x810a1470 <srv_sys+112>) at ./storage/innobase/srv/srv0srv.cc:937

#6  srv_purge_coordinator_suspend (rseg_history_len=<optimized out>, slot=<optimized out>) at ./storage/innobase/srv/srv0srv.cc:2778

#7  srv_purge_coordinator_thread (arg=<optimized out>) at ./storage/innobase/srv/srv0srv.cc:2865

#8  0xb76e227a in start_thread (arg=0x9eecfb40) at pthread_create.c:456

#9  0xb706c366 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:110

Thread 25 (Thread 0xa8350b40 (LWP 2576)):

#0  0xb7703cf9 in __kernel_vsyscall ()

#1  0xb706cb0a in epoll_wait () at ../sysdeps/unix/syscall-template.S:84

#2  0xb20f5698 in asio::detail::epoll_reactor::run (this=0x81e0fd20, block=true, ops=...) at /usr/include/asio/detail/impl/epoll_reactor.ipp:391

#3  0xb214fb57 in asio::detail::task_io_service::do_run_one (ec=..., this_thread=..., lock=..., this=0x81e0fc50) at /usr/include/asio/detail/impl/task_io_service.ipp:355

#4  asio::detail::task_io_service::run (ec=..., this=0x81e0fc50) at /usr/include/asio/detail/impl/task_io_service.ipp:148

#5  asio::io_service::run (this=<optimized out>) at /usr/include/asio/impl/io_service.ipp:58

#6  gcomm::AsioProtonet::event_loop (this=<optimized out>, period=...) at ./gcomm/src/asio_protonet.cpp:116

#7  0xb212c6bf in GCommConn::run (this=0x81e0f368) at ./gcs/src/gcs_gcomm.cpp:433

#8  0xb2138118 in GCommConn::run_fn (arg=0x81e0f368) at ./gcs/src/gcs_gcomm.cpp:174

#9  0xb76e227a in start_thread (arg=0xa8350b40) at pthread_create.c:456

#10 0xb706c366 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:110

Thread 24 (Thread 0xa1ed5b40 (LWP 2766)):

#0  0xb7703cf9 in __kernel_vsyscall ()

#1  0xb76eb7fa in nanosleep () at ../sysdeps/unix/syscall-template.S:84

#2  0x80727200 in os_thread_sleep (tm=1000000) at ./storage/innobase/os/os0thread.cc:231

#3  0x807bdede in srv_master_sleep () at ./storage/innobase/srv/srv0srv.cc:2419

#4  srv_master_thread (arg=<optimized out>) at ./storage/innobase/srv/srv0srv.cc:2459

#5  0xb76e227a in start_thread (arg=0xa1ed5b40) at pthread_create.c:456

#6  0xb706c366 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:110

Thread 23 (Thread 0x9fed1b40 (LWP 2767)):

#0  0xb7703cf9 in __kernel_vsyscall ()

#1  0xb76e7fb5 in pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/i386/i686/../pthread_cond_timedwait.S:245

#2  0x807267cb in os_event::timed_wait (abstime=0x9fed10ac, this=0x81f74730) at ./storage/innobase/os/os0event.cc:275

#3  os_event::wait_time_low (this=0x81f74730, time_in_usec=10000000, reset_sig_count=1) at ./storage/innobase/os/os0event.cc:385

#4  0x80726dc9 in os_event_wait_time_low (event=0x81f74730, time_in_usec=10000000, reset_sig_count=0) at ./storage/innobase/os/os0event.cc:490

#5  0x808b7668 in dict_stats_thread () at ./storage/innobase/dict/dict0stats_bg.cc:475

#6  0xb76e227a in start_thread (arg=0x9fed1b40) at pthread_create.c:456

#7  0xb706c366 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:110

Thread 22 (Thread 0x9a6fab40 (LWP 2777)):

#0  0xb7703cf9 in __kernel_vsyscall ()

#1  0xb76e7fb5 in pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/i386/i686/../pthread_cond_timedwait.S:245

#2  0x8097461d in inline_mysql_cond_timedwait (src_file=0x80c24364 "/home/buildbot/buildbot/build/mariadb-10.2.37/storage/maria/ma_servicethread.c", src_line=116, abstime=0x9a6fa194, mutex=0x81967454 <LOCK_checkpoint>, that=0x81967420 <COND_checkpoint>) at ./include/mysql/psi/mysql_thread.h:1182

#3  my_service_thread_sleep (control=0x810a24a4 <checkpoint_control>, sleep_time=30000000000) at ./storage/maria/ma_servicethread.c:115

#4  0x8096b126 in ma_checkpoint_background (arg=0x1e) at ./storage/maria/ma_checkpoint.c:709

#5  0x80a597db in pfs_spawn_thread (arg=<optimized out>) at ./storage/perfschema/pfs.cc:1869

#6  0xb76e227a in start_thread (arg=0x9a6fab40) at pthread_create.c:456

#7  0xb706c366 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:110

Thread 21 (Thread 0xa6489b40 (LWP 2778)):

#0  0xb7703cf9 in __kernel_vsyscall ()

#1  0xb76ec06d in do_sigwait (set=<optimized out>, set@entry=0xa64891b4, sig=sig@entry=0xa6489184) at ../sysdeps/unix/sysv/linux/sigwait.c:61

#2  0xb76ec0fe in __sigwait (set=0xa64891b4, sig=0xa6489184) at ../sysdeps/unix/sysv/linux/sigwait.c:96

#3  0x802b337a in signal_hand (arg=0x0) at ./sql/mysqld.cc:3557

#4  0x80a597db in pfs_spawn_thread (arg=<optimized out>) at ./storage/perfschema/pfs.cc:1869

#5  0xb76e227a in start_thread (arg=0xa6489b40) at pthread_create.c:456

#6  0xb706c366 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:110

Thread 20 (Thread 0xa16d4b40 (LWP 2763)):

#0  0xb7703cf9 in __kernel_vsyscall ()

#1  0xb76e7fb5 in pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/i386/i686/../pthread_cond_timedwait.S:245

#2  0x807267cb in os_event::timed_wait (abstime=0xa16d40ac, this=0x81f6b7d8) at ./storage/innobase/os/os0event.cc:275

#3  os_event::wait_time_low (this=0x81f6b7d8, time_in_usec=1000000, reset_sig_count=1) at ./storage/innobase/os/os0event.cc:385

#4  0x80726dc9 in os_event_wait_time_low (event=0x81f6b7d8, time_in_usec=1000000, reset_sig_count=1) at ./storage/innobase/os/os0event.cc:490

#5  0x806f965f in lock_wait_timeout_thread () at ./storage/innobase/lock/lock0wait.cc:525

#6  0xb76e227a in start_thread (arg=0xa16d4b40) at pthread_create.c:456

#7  0xb706c366 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:110

Thread 19 (Thread 0xa62ffb40 (LWP 2779)):

#0  0xb7703cf9 in __kernel_vsyscall ()

#1  0xb76e7beb in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/i386/pthread_cond_wait.S:187

#2  0x8035580c in inline_mysql_cond_wait (that=0x81108fe0 <COND_manager>, mutex=0x81109014 <LOCK_manager>, src_file=0x80b31cc8 "/home/buildbot/buildbot/build/mariadb-10.2.37/sql/sql_manager.cc", src_line=102) at ./include/mysql/psi/mysql_thread.h:1145

#3  handle_manager (arg=0x0) at ./sql/sql_manager.cc:102

#4  0x80a597db in pfs_spawn_thread (arg=<optimized out>) at ./storage/perfschema/pfs.cc:1869

#5  0xb76e227a in start_thread (arg=0xa62ffb40) at pthread_create.c:456

#6  0xb706c366 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:110

Thread 18 (Thread 0xa40deb40 (LWP 2757)):

#0  0xb76c65b0 in ?? () from /lib/i386-linux-gnu/libaio.so.1

#1  0xb76c6626 in io_getevents () from /lib/i386-linux-gnu/libaio.so.1

#2  0x8071c621 in LinuxAIOHandler::collect (this=0xa40de104) at ./storage/innobase/os/os0file.cc:1936

#3  0x80723671 in LinuxAIOHandler::poll (this=0xa40de104, m1=0xa40de180, m2=0xa40de184, request=0xa40de188) at ./storage/innobase/os/os0file.cc:2097

#4  0x80724006 in os_aio_linux_handler (request=0xa40de188, m2=0xa40de184, m1=0xa40de180, global_segment=<optimized out>) at ./storage/innobase/os/os0file.cc:2151

#5  os_aio_handler (segment=<optimized out>, m1=0xa40de180, m2=0xa40de184, request=0xa40de188) at ./storage/innobase/os/os0file.cc:5784

#6  0x808c0f02 in fil_aio_wait (segment=3) at ./storage/innobase/fil/fil0fil.cc:5115

#7  0x807c1cb1 in io_handler_thread (arg=<optimized out>) at ./storage/innobase/srv/srv0start.cc:332

#8  0xb76e227a in start_thread (arg=0xa40deb40) at pthread_create.c:456

#9  0xb706c366 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:110

Thread 17 (Thread 0x9cecbb40 (LWP 2773)):

#0  0xb7703cf9 in __kernel_vsyscall ()

#1  0xb76e7beb in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/i386/pthread_cond_wait.S:187

#2  0x80726e39 in os_event::wait (this=0x81e90af0) at ./storage/innobase/os/os0event.cc:158

#3  os_event::wait_low (reset_sig_count=1, this=0x81e90af0) at ./storage/innobase/os/os0event.cc:325

#4  os_event_wait_low (event=0x81e90af0, reset_sig_count=0) at ./storage/innobase/os/os0event.cc:507

#5  0x80860c22 in buf_dump_thread () at ./storage/innobase/buf/buf0dump.cc:806

#6  0xb76e227a in start_thread (arg=0x9cecbb40) at pthread_create.c:456

#7  0xb706c366 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:110

Thread 16 (Thread 0xa06d2b40 (LWP 2765)):

#0  0xb7703cf9 in __kernel_vsyscall ()

#1  0xb76e7fb5 in pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/i386/i686/../pthread_cond_timedwait.S:245

#2  0x807267cb in os_event::timed_wait (abstime=0xa06d210c, this=0x81e90a98) at ./storage/innobase/os/os0event.cc:275

#3  os_event::wait_time_low (this=0x81e90a98, time_in_usec=5000000, reset_sig_count=1) at ./storage/innobase/os/os0event.cc:385

#4  0x80726dc9 in os_event_wait_time_low (event=0x81e90a98, time_in_usec=5000000, reset_sig_count=1) at ./storage/innobase/os/os0event.cc:490

#5  0x807bc6c9 in srv_monitor_thread () at ./storage/innobase/srv/srv0srv.cc:1748

#6  0xb76e227a in start_thread (arg=0xa06d2b40) at pthread_create.c:456

#7  0xb706c366 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:110

Thread 15 (Thread 0xa30dcb40 (LWP 2759)):

#0  0xb76c65b0 in ?? () from /lib/i386-linux-gnu/libaio.so.1

#1  0xb76c6626 in io_getevents () from /lib/i386-linux-gnu/libaio.so.1

#2  0x8071c621 in LinuxAIOHandler::collect (this=0xa30dc104) at ./storage/innobase/os/os0file.cc:1936

#3  0x80723671 in LinuxAIOHandler::poll (this=0xa30dc104, m1=0xa30dc180, m2=0xa30dc184, request=0xa30dc188) at ./storage/innobase/os/os0file.cc:2097

#4  0x80724006 in os_aio_linux_handler (request=0xa30dc188, m2=0xa30dc184, m1=0xa30dc180, global_segment=<optimized out>) at ./storage/innobase/os/os0file.cc:2151

#5  os_aio_handler (segment=<optimized out>, m1=0xa30dc180, m2=0xa30dc184, request=0xa30dc188) at ./storage/innobase/os/os0file.cc:5784

#6  0x808c0f02 in fil_aio_wait (segment=5) at ./storage/innobase/fil/fil0fil.cc:5115

#7  0x807c1cb1 in io_handler_thread (arg=<optimized out>) at ./storage/innobase/srv/srv0start.cc:332

#8  0xb76e227a in start_thread (arg=0xa30dcb40) at pthread_create.c:456

#9  0xb706c366 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:110

Thread 14 (Thread 0x9e6ceb40 (LWP 2770)):

#0  0xb7703cf9 in __kernel_vsyscall ()

#1  0xb76e7beb in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/i386/pthread_cond_wait.S:187

#2  0x80726e39 in os_event::wait (this=0x81e90938) at ./storage/innobase/os/os0event.cc:158

#3  os_event::wait_low (reset_sig_count=1010, this=0x81e90938) at ./storage/innobase/os/os0event.cc:325

#4  os_event_wait_low (event=0x81e90938, reset_sig_count=0) at ./storage/innobase/os/os0event.cc:507

#5  0x807becdc in srv_resume_thread (sig_count=0, timeout_usec=0, wait=true, slot=0x810a148c <srv_sys+140>) at ./storage/innobase/srv/srv0srv.cc:937

#6  srv_worker_thread (arg=<optimized out>) at ./storage/innobase/srv/srv0srv.cc:2617

#7  0xb76e227a in start_thread (arg=0x9e6ceb40) at pthread_create.c:456

#8  0xb706c366 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:110

Thread 13 (Thread 0xa7b4fb40 (LWP 2577)):

#0  0xb7703cf9 in __kernel_vsyscall ()

#1  0xb76e7beb in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/i386/pthread_cond_wait.S:187

#2  0xb2129841 in gu::Lock::wait (this=0xa7b4ea44, cond=...) at ./galerautils/src/gu_lock.hpp:59

#3  RecvBuf::front (timeout=..., this=0x81e0f49c) at ./gcs/src/gcs_gcomm.cpp:114

#4  gcomm_recv (backend=0x81dc5294, msg=0x81dc51ac, timeout=9223372035999999999) at ./gcs/src/gcs_gcomm.cpp:608

#5  0xb211f3f2 in core_msg_recv (timeout=9223372035999999999, recv_msg=0x81dc51ac, backend=0x81dc5294) at ./gcs/src/gcs_core.cpp:469

#6  gcs_core_recv (conn=0x81dc5170, recv_act=0xa7b4f240, timeout=9223372035999999999) at ./gcs/src/gcs_core.cpp:1102

#7  0xb211a383 in gcs_recv_thread (arg=0x81dc5040) at ./gcs/src/gcs.cpp:1277

#8  0xb76e227a in start_thread (arg=0xa7b4fb40) at pthread_create.c:456

#9  0xb706c366 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:110

Thread 12 (Thread 0xa0ed3b40 (LWP 2764)):

#0  0xb7703cf9 in __kernel_vsyscall ()

#1  0xb76e7fb5 in pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/i386/i686/../pthread_cond_timedwait.S:245

#2  0x807267cb in os_event::timed_wait (abstime=0xa0ed308c, this=0x81e90a40) at ./storage/innobase/os/os0event.cc:275

#3  os_event::wait_time_low (this=0x81e90a40, time_in_usec=1000000, reset_sig_count=1) at ./storage/innobase/os/os0event.cc:385

#4  0x80726dc9 in os_event_wait_time_low (event=0x81e90a40, time_in_usec=1000000, reset_sig_count=1) at ./storage/innobase/os/os0event.cc:490

#5  0x807bcd29 in srv_error_monitor_thread () at ./storage/innobase/srv/srv0srv.cc:1912

#6  0xb76e227a in start_thread (arg=0xa0ed3b40) at pthread_create.c:456

#7  0xb706c366 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:110

Thread 11 (Thread 0xaa054b40 (LWP 2575)):

#0  0xb7703cf9 in __kernel_vsyscall ()

#1  0xb76e7beb in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/i386/pthread_cond_wait.S:187

#2  0xb20dadca in gu::Lock::wait (this=0xaa054158, cond=...) at ./galerautils/src/gu_lock.hpp:59

#3  galera::ServiceThd::thd_func (arg=<optimized out>) at ./galera/src/galera_service_thd.cpp:30

#4  0xb76e227a in start_thread (arg=0xaa054b40) at pthread_create.c:456

#5  0xb706c366 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:110

Thread 10 (Thread 0xa48dfb40 (LWP 2756)):

#0  0xb76c65b0 in ?? () from /lib/i386-linux-gnu/libaio.so.1

#1  0xb76c6626 in io_getevents () from /lib/i386-linux-gnu/libaio.so.1

#2  0x8071c621 in LinuxAIOHandler::collect (this=0xa48df104) at ./storage/innobase/os/os0file.cc:1936

#3  0x80723671 in LinuxAIOHandler::poll (this=0xa48df104, m1=0xa48df180, m2=0xa48df184, request=0xa48df188) at ./storage/innobase/os/os0file.cc:2097

#4  0x80724006 in os_aio_linux_handler (request=0xa48df188, m2=0xa48df184, m1=0xa48df180, global_segment=<optimized out>) at ./storage/innobase/os/os0file.cc:2151

#5  os_aio_handler (segment=<optimized out>, m1=0xa48df180, m2=0xa48df184, request=0xa48df188) at ./storage/innobase/os/os0file.cc:5784

#6  0x808c0f02 in fil_aio_wait (segment=2) at ./storage/innobase/fil/fil0fil.cc:5115

#7  0x807c1cb1 in io_handler_thread (arg=<optimized out>) at ./storage/innobase/srv/srv0start.cc:332

#8  0xb76e227a in start_thread (arg=0xa48dfb40) at pthread_create.c:456

#9  0xb706c366 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:110

Thread 9 (Thread 0xa38ddb40 (LWP 2758)):

#0  0xb76c65b0 in ?? () from /lib/i386-linux-gnu/libaio.so.1

#1  0xb76c6626 in io_getevents () from /lib/i386-linux-gnu/libaio.so.1

#2  0x8071c621 in LinuxAIOHandler::collect (this=0xa38dd104) at ./storage/innobase/os/os0file.cc:1936

#3  0x80723671 in LinuxAIOHandler::poll (this=0xa38dd104, m1=0xa38dd180, m2=0xa38dd184, request=0xa38dd188) at ./storage/innobase/os/os0file.cc:2097

#4  0x80724006 in os_aio_linux_handler (request=0xa38dd188, m2=0xa38dd184, m1=0xa38dd180, global_segment=<optimized out>) at ./storage/innobase/os/os0file.cc:2151

#5  os_aio_handler (segment=<optimized out>, m1=0xa38dd180, m2=0xa38dd184, request=0xa38dd188) at ./storage/innobase/os/os0file.cc:5784

#6  0x808c0f02 in fil_aio_wait (segment=4) at ./storage/innobase/fil/fil0fil.cc:5115

#7  0x807c1cb1 in io_handler_thread (arg=<optimized out>) at ./storage/innobase/srv/srv0start.cc:332

#8  0xb76e227a in start_thread (arg=0xa38ddb40) at pthread_create.c:456

#9  0xb706c366 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:110

Thread 8 (Thread 0x9bec9b40 (LWP 2775)):

#0  0xb7703cf9 in __kernel_vsyscall ()

#1  0xb76e7beb in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/i386/pthread_cond_wait.S:187

#2  0x80726e39 in os_event::wait (this=0x81e90ba0) at ./storage/innobase/os/os0event.cc:158

#3  os_event::wait_low (reset_sig_count=1, this=0x81e90ba0) at ./storage/innobase/os/os0event.cc:325

#4  os_event_wait_low (event=0x81e90ba0, reset_sig_count=0) at ./storage/innobase/os/os0event.cc:507

#5  0x8085679a in buf_resize_thread () at ./storage/innobase/buf/buf0buf.cc:3109

#6  0xb76e227a in start_thread (arg=0x9bec9b40) at pthread_create.c:456

#7  0xb706c366 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:110

Thread 7 (Thread 0xa71ffb40 (LWP 2579)):

#0  0xb7703cf9 in __kernel_vsyscall ()

#1  0xb76e7beb in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/i386/pthread_cond_wait.S:187

#2  0x8044be1f in inline_mysql_cond_wait (src_file=0x80b42360 "/home/buildbot/buildbot/build/mariadb-10.2.37/sql/mdl.cc", src_line=1087, mutex=0xa6d005ac, that=0xa6d005c8) at ./include/mysql/psi/mysql_thread.h:1145

#3  MDL_wait::timed_wait (this=0xa6d005ac, owner=0xa6d00580, abs_timeout=0xa71fcce8, set_status_on_timeout=false, wait_state_name=0x81094858 <MDL_key::m_namespace_to_wait_state_name+24>) at ./sql/mdl.cc:1087

#4  0x8044dabb in MDL_context::acquire_lock (this=0xa6d005ac, mdl_request=0xa6d08af8, lock_wait_timeout=86400) at ./sql/mdl.cc:2138

#5  0x8044e3fe in MDL_context::acquire_locks (this=0xa6d005ac, mdl_requests=0xa71fcdec, lock_wait_timeout=86400) at ./sql/mdl.cc:2258

#6  0x803142ab in lock_table_names (thd=0xa6d00510, options=..., tables_start=0xa6d08860, tables_end=0x0, lock_wait_timeout=86400, flags=0) at ./sql/sql_base.cc:3831

#7  0x80315d71 in open_tables (thd=<optimized out>, options=..., start=0xa71fd0f8, counter=0xa71fd0c4, flags=0, prelocking_strategy=0xa71fd13c) at ./sql/sql_base.cc:4051

#8  0x80316487 in open_and_lock_tables (thd=0xa6d00510, options=..., tables=<optimized out>, derived=false, flags=0, prelocking_strategy=0xa71fd13c) at ./sql/sql_base.cc:4880

#9  0x803f002e in open_and_lock_tables (flags=0, derived=false, tables=0xa6d08860, options=..., thd=0xa6d00510) at ./sql/sql_base.h:500

#10 mysql_create_table (thd=0xa6d00510, create_table=0xa6d08860, create_info=0xa71fd1f0, alter_info=0xa71fd194) at ./sql/sql_table.cc:5108

#11 0x803f1072 in Sql_cmd_create_table::execute (this=0xa6d08848, thd=0xa6d00510) at ./sql/sql_table.cc:10984

#12 0x80361aa3 in mysql_execute_command (thd=<optimized out>) at ./sql/sql_parse.cc:5994

#13 0x803684b7 in mysql_parse (thd=0xa6d00510, rawbuf=0xa6d6ece3 "CREATE TABLE `t1` (\n  `SLEEP(0)` bigint(21) NOT NULL\n)", length=54, parser_state=0xa71fe1f8, is_com_multi=false, is_next_command=false) at ./sql/sql_parse.cc:7763

#14 0x80608b0e in Query_log_event::do_apply_event (this=0xa6d4ed70, rgi=0xa6d17c48, query_arg=0xa6d6ece3 "CREATE TABLE `t1` (\n  `SLEEP(0)` bigint(21) NOT NULL\n)", q_len_arg=54) at ./sql/log_event.cc:5355

#15 0x80609a04 in Query_log_event::do_apply_event (this=0xa6d4ed70, rgi=0xa6d17c48) at ./sql/log_event.cc:5035

#16 0x804b991d in Log_event::apply_event (rgi=0xa6d17c48, this=0xa6d4ed70) at ./sql/log_event.h:1454

#17 wsrep_apply_events (buf_len=<optimized out>, events_buf=0xaa0abe30, thd=0xa6d00510) at ./sql/wsrep_applier.cc:164

#18 wsrep_apply_cb (ctx=0xa6d00510, buf=0xaa0abe30, buf_len=254, flags=9, meta=0xa71fe8d8) at ./sql/wsrep_applier.cc:267

#19 0xb2083d1e in galera::TrxHandle::apply (this=0xa6d39420, recv_ctx=0xa6d00510, apply_cb=0x804b93b0 <wsrep_apply_cb(void*, void const*, size_t, uint32_t, wsrep_trx_meta_t const*)>, meta=...) at ./galera/src/trx_handle.cpp:317

#20 0xb2094223 in apply_trx_ws (recv_ctx=0xb22fa740, recv_ctx@entry=0xa6d00510, apply_cb=0xa6d00510, commit_cb=0x1, trx=..., meta=...) at ./galera/src/replicator_smm.cpp:34

#21 0xb209835d in galera::ReplicatorSMM::apply_trx (this=0x81dc0108, recv_ctx=<optimized out>, trx=<optimized out>) at ./galera/src/replicator_smm.cpp:454

#22 0xb209c68b in galera::ReplicatorSMM::process_trx (this=0x81dc0108, recv_ctx=0xa6d00510, trx=0xa6d39420) at ./galera/src/replicator_smm.cpp:1258

#23 0xb20e6fbf in galera::GcsActionSource::dispatch (this=0x81dc05f4, recv_ctx=0xa6d00510, act=..., exit_loop=@0xa71fef2b: false) at ./galera/src/gcs_action_source.cpp:115

#24 0xb20e8620 in galera::GcsActionSource::process (this=<optimized out>, recv_ctx=<optimized out>, exit_loop=<optimized out>) at ./galera/src/gcs_action_source.cpp:180

#25 0xb209cf56 in galera::ReplicatorSMM::async_recv (this=<optimized out>, recv_ctx=<optimized out>) at ./galera/src/replicator_smm.cpp:362

#26 0xb2068c74 in galera_recv (gh=0x81d9bdf0, recv_ctx=0xa6d00510) at ./galera/src/wsrep_provider.cpp:244

#27 0x804ba9d1 in wsrep_replication_process (thd=0xa6d00510) at ./sql/wsrep_thd.cc:486

#28 0x804aa825 in start_wsrep_THD (arg=0x81e2ce78) at ./sql/wsrep_mysqld.cc:2173

#29 0x80a597db in pfs_spawn_thread (arg=<optimized out>) at ./storage/perfschema/pfs.cc:1869

#30 0xb76e227a in start_thread (arg=0xa71ffb40) at pthread_create.c:456

#31 0xb706c366 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:110

Thread 6 (Thread 0xa6cffb40 (LWP 2754)):

#0  0xb76c65b0 in ?? () from /lib/i386-linux-gnu/libaio.so.1

#1  0xb76c6626 in io_getevents () from /lib/i386-linux-gnu/libaio.so.1

#2  0x8071c621 in LinuxAIOHandler::collect (this=0xa6cff104) at ./storage/innobase/os/os0file.cc:1936

#3  0x80723671 in LinuxAIOHandler::poll (this=0xa6cff104, m1=0xa6cff180, m2=0xa6cff184, request=0xa6cff188) at ./storage/innobase/os/os0file.cc:2097

#4  0x80724006 in os_aio_linux_handler (request=0xa6cff188, m2=0xa6cff184, m1=0xa6cff180, global_segment=<optimized out>) at ./storage/innobase/os/os0file.cc:2151

#5  os_aio_handler (segment=<optimized out>, m1=0xa6cff180, m2=0xa6cff184, request=0xa6cff188) at ./storage/innobase/os/os0file.cc:5784

#6  0x808c0f02 in fil_aio_wait (segment=0) at ./storage/innobase/fil/fil0fil.cc:5115

#7  0x807c1cb1 in io_handler_thread (arg=<optimized out>) at ./storage/innobase/srv/srv0start.cc:332

#8  0xb76e227a in start_thread (arg=0xa6cffb40) at pthread_create.c:456

#9  0xb706c366 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:110

Thread 5 (Thread 0xa734eb40 (LWP 2578)):

#0  0xb7703cf9 in __kernel_vsyscall ()

#1  0xb76e7beb in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/i386/pthread_cond_wait.S:187

#2  0x804bb18d in inline_mysql_cond_wait (src_file=0x80b55ec0 "/home/buildbot/buildbot/build/mariadb-10.2.37/sql/wsrep_thd.cc", src_line=632, mutex=<optimized out>, that=<optimized out>) at ./include/mysql/psi/mysql_thread.h:1145

#3  wsrep_rollback_process (thd=0xa6e00510) at ./sql/wsrep_thd.cc:632

#4  0x804aa825 in start_wsrep_THD (arg=0x81e2c880) at ./sql/wsrep_mysqld.cc:2173

#5  0x80a597db in pfs_spawn_thread (arg=<optimized out>) at ./storage/perfschema/pfs.cc:1869

#6  0xb76e227a in start_thread (arg=0xa734eb40) at pthread_create.c:456

#7  0xb706c366 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:110

Thread 4 (Thread 0x9f6d0b40 (LWP 2768)):

#0  0xb7703cf9 in __kernel_vsyscall ()

#1  0xb76e7fb5 in pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/i386/i686/../pthread_cond_timedwait.S:245

#2  0x807267cb in os_event::timed_wait (abstime=0x9f6cff9c, this=0x81fad708) at ./storage/innobase/os/os0event.cc:275

#3  os_event::wait_time_low (this=0x81fad708, time_in_usec=5000000, reset_sig_count=1) at ./storage/innobase/os/os0event.cc:385

#4  0x80726dc9 in os_event_wait_time_low (event=0x81fad708, time_in_usec=5000000, reset_sig_count=1) at ./storage/innobase/os/os0event.cc:490

#5  0x80816150 in ib_wqueue_timedwait (wq=<optimized out>, wait_in_usecs=<optimized out>) at ./storage/innobase/ut/ut0wqueue.cc:156

#6  0x80903ca9 in fts_optimize_thread (arg=<optimized out>) at ./storage/innobase/fts/fts0opt.cc:2829

#7  0xb76e227a in start_thread (arg=0x9f6d0b40) at pthread_create.c:456

#8  0xb706c366 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:110

Thread 3 (Thread 0xb2c91b40 (LWP 2574)):

#0  0xb7703cf9 in __kernel_vsyscall ()

#1  0xb76e7fb5 in pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/i386/i686/../pthread_cond_timedwait.S:245

#2  0x80aab1a4 in inline_mysql_cond_timedwait (that=0x819731e0 <COND_timer>, mutex=0x81973214 <LOCK_timer>, src_file=0x80c38964 "/home/buildbot/buildbot/build/mariadb-10.2.37/mysys/thr_timer.c", src_line=292, abstime=0xb2c91224) at ./include/mysql/psi/mysql_thread.h:1182

#3  timer_handler (arg=0x0) at ./mysys/thr_timer.c:292

#4  0x80a597db in pfs_spawn_thread (arg=<optimized out>) at ./storage/perfschema/pfs.cc:1869

#5  0xb76e227a in start_thread (arg=0xb2c91b40) at pthread_create.c:456

#6  0xb706c366 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:110

Thread 2 (Thread 0xa50e0b40 (LWP 2755)):

#0  0xb76c65b0 in ?? () from /lib/i386-linux-gnu/libaio.so.1

#1  0xb76c6626 in io_getevents () from /lib/i386-linux-gnu/libaio.so.1

#2  0x8071c621 in LinuxAIOHandler::collect (this=0xa50e0104) at ./storage/innobase/os/os0file.cc:1936

#3  0x80723671 in LinuxAIOHandler::poll (this=0xa50e0104, m1=0xa50e0180, m2=0xa50e0184, request=0xa50e0188) at ./storage/innobase/os/os0file.cc:2097

#4  0x80724006 in os_aio_linux_handler (request=0xa50e0188, m2=0xa50e0184, m1=0xa50e0180, global_segment=<optimized out>) at ./storage/innobase/os/os0file.cc:2151

#5  os_aio_handler (segment=<optimized out>, m1=0xa50e0180, m2=0xa50e0184, request=0xa50e0188) at ./storage/innobase/os/os0file.cc:5784

#6  0x808c0f02 in fil_aio_wait (segment=1) at ./storage/innobase/fil/fil0fil.cc:5115

#7  0x807c1cb1 in io_handler_thread (arg=<optimized out>) at ./storage/innobase/srv/srv0start.cc:332

#8  0xb76e227a in start_thread (arg=0xa50e0b40) at pthread_create.c:456

#9  0xb706c366 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:110

Thread 1 (Thread 0xb6da17c0 (LWP 2572)):

#0  0xb7703cf9 in __kernel_vsyscall ()

#1  0xb76e8e41 in __pthread_kill (threadid=3067746240, signo=6) at ../sysdeps/unix/sysv/linux/pthread_kill.c:55

#2  0x80aa695c in my_write_core (sig=6) at ./mysys/stacktrace.c:382

#3  0x8051c00b in handle_fatal_signal (sig=6) at ./sql/signal_handler.cc:343

#4  <signal handler called>

#5  0xb7703cf9 in __kernel_vsyscall ()

#6  0xb706246f in poll () at ../sysdeps/unix/syscall-template.S:84

#7  0xb707c6a0 in __poll_chk (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>, fdslen=24) at poll_chk.c:27

#8  0x802bd5f1 in poll (__timeout=-1, __nfds=2, __fds=0xbf897f10) at /usr/include/i386-linux-gnu/bits/poll2.h:41

#9  handle_connections_sockets () at ./sql/mysqld.cc:6724

#10 0x802bf1ea in mysqld_main (argc=<optimized out>, argv=<optimized out>) at ./sql/mysqld.cc:6192

#11 0x8029f627 in main (argc=22, argv=0xbf898204) at ./sql/main.cc:25

 - deleting it, already saved 0

 - found 'core' (0/0)

Trying 'dbx' to get a backtrace