Stepan Patryshev (Inactive) added a comment - 2020-12-23 18:53 - edited It failed on BB, 10.5 with signal 11. stdio.log : 10.5.9, e8217d070fc3e60870131615a48515836c773b07, kvm-deb-xenial-amd64 galera_sr.galera_sr_shutdown_master 'innodb' w1 [ fail ] Test ended at 2020-12-14 14:47:50   CURRENT_TEST: galera_sr.galera_sr_shutdown_master mysqltest: In included file "./include/galera_init.inc": included from ./include/galera_cluster.inc at line 16: included from /usr/share/mysql/mysql-test/suite/galera_sr/t/galera_sr_shutdown_master.test at line 6: At line 25: query 'connect $galera_connection_name,127.0.0.1,root,,test,$_galera_port,' failed: 2013: Lost connection to MySQL server at 'handshake: reading initial communication packet', system error: 11     Server [mysqld.1 - pid: 5735, winpid: 5735, exit: 256] failed during test run Server log from this test: ----------SERVER LOG START----------- 201214 14:47:36 [ERROR] mysqld got signal 11 ; This could be because you hit a bug. It is also possible that this binary or one of the libraries it was linked against is corrupt, improperly built, or misconfigured. This error can also be caused by malfunctioning hardware.   To report this bug, see https://mariadb.com/kb/en/reporting-bugs   We will try our best to scrape up some info that will hopefully help diagnose the problem, but since we have already crashed, something is definitely wrong and this may fail.   Server version: 10.5.9-MariaDB-1:10.5.9+maria~xenial-log key_buffer_size=1048576 read_buffer_size=131072 max_used_connections=64 max_threads=153 thread_count=67 It is possible that mysqld could use up to key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 63638 K bytes of memory Hope that's ok; if not, decrease some variables in the equation.   Thread pointer: 0x7f87bcb3d778 Attempting backtrace. You can use the following information to find out where mysqld died. If you see no messages after this, something went terribly wrong... stack_bottom = 0x7f87d0357cb8 thread_stack 0x49000 ??:0(my_print_stacktrace)[0x55d6e0acae2e] ??:0(handle_fatal_signal)[0x55d6e04ff1bf] ??:0(__restore_rt)[0x7f8821e8d390] ??:0(thd_clear_errors(THD*))[0x55d6e02aaa6e] ??:0(THD::change_user())[0x55d6e02af941] ??:0(THD::reset_for_reuse())[0x55d6e02afb29] ??:0(CONNECT::create_thd(THD*))[0x55d6e03f0a24] ??:0(do_handle_one_connection(CONNECT*, bool))[0x55d6e03f103b] ??:0(handle_one_connection)[0x55d6e03f1454] ??:0(MyCTX_nopad::finish(unsigned char*, unsigned int*))[0x55d6e07358f1] ??:0(start_thread)[0x7f8821e836ba] x86_64/clone.S:111(clone)[0x7f882132a4dd]   Trying to get some variables. Some pointers may be invalid and cause the dump to abort. Query (0x0): (null) Connection ID (thread ID): 319 Status: NOT_KILLED   Optimizer switch: index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,engine_condition_pushdown=off,index_condition_pushdown=on,derived_merge=on,derived_with_keys=on,firstmatch=on,loosescan=on,materialization=on,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,outer_join_with_cache=on,semijoin_with_cache=on,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=on,table_elimination=on,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_materialized=on,condition_pushdown_for_subquery=on,rowid_filter=on,condition_pushdown_from_having=on,not_null_range_scan=off   The manual page at https://mariadb.com/kb/en/how-to-produce-a-full-stack-trace-for-mysqld/ contains information that should help you find out what is causing the crash.   We think the query pointer is invalid, but we will try to print it anyway. Query:   Writing a core file... Working directory at /dev/shm/var/1/mysqld.1/data Resource Limits: Limit Soft Limit Hard Limit Units Max cpu time unlimited unlimited seconds Max file size unlimited unlimited bytes Max data size unlimited unlimited bytes Max stack size 8388608 unlimited bytes Max core file size unlimited unlimited bytes Max resident set unlimited unlimited bytes Max processes 23720 23720 processes Max open files 1024 1024 files Max locked memory 65536 65536 bytes Max address space unlimited unlimited bytes Max file locks unlimited unlimited locks Max pending signals 23720 23720 signals Max msgqueue size 819200 819200 bytes Max nice priority 0 0 Max realtime priority 0 0 Max realtime timeout unlimited unlimited us Core pattern: |/usr/share/apport/apport %p %s %c %P   ----------SERVER LOG END-------------     - found 'core' (0/0)   Trying 'dbx' to get a backtrace   Trying 'gdb' to get a backtrace from coredump /dev/shm/var/1/log/galera_sr.galera_sr_shutdown_master-innodb/mysqld.1/data/core   Trying 'lldb' to get a backtrace from coredump /dev/shm/var/1/log/galera_sr.galera_sr_shutdown_master-innodb/mysqld.1/data/core - deleting it, already saved 0 - saving '/dev/shm/var/1/log/galera_sr.galera_sr_shutdown_master-innodb/' to '/dev/shm/var/log/galera_sr.galera_sr_shutdown_master-innodb/'   Retrying test galera_sr.galera_sr_shutdown_master, attempt(2/3)...   worker[1] > Restart - not started worker[1] > Restart - not started 10.5.9 Server crash logs