Hello,
we have a client VM with MariaDB 10.4.8 which crashes always on the same
query (it's in the log). Can someone help me to debug the problem, or is
it already known problem? Server ist a CentOS 7 patched up to date and
MariaDB 10.4.8 from the MariaDB repositories.
Log contains the following:
191003 9:43:19 [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: 10.4.8-MariaDB
key_buffer_size=134217728
read_buffer_size=131072
max_used_connections=1
max_threads=302
thread_count=7
It is possible that mysqld could use up to
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads =
795622 K bytes of memory
Hope that's ok; if not, decrease some variables in the equation.
Thread pointer: 0x55d12dc0ed28
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 = 0x7ff2fd21dcf0 thread_stack 0x49000
/usr/sbin/mysqld(my_print_stacktrace+0x2e)[0x55d12b70483e]
/usr/sbin/mysqld(handle_fatal_signal+0x30f)[0x55d12b19ae0f]
sigaction.c:0(__restore_rt)[0x7ff3153325f0]
/usr/sbin/mysqld(handler_index_cond_check+0xbf)[0x55d12b1a56af]
/usr/sbin/mysqld(+0x59ee80)[0x55d12ae94e80]
/usr/sbin/mysqld(+0xb340cd)[0x55d12b42a0cd]
/usr/sbin/mysqld(+0xa52c87)[0x55d12b348c87]
/usr/sbin/mysqld(+0xa52edf)[0x55d12b348edf]
/usr/sbin/mysqld(_ZN7handler11ha_rnd_nextEPh+0x10f)[0x55d12b19f8ff]
/usr/sbin/mysqld(_Z13rr_sequentialP11READ_RECORD+0x1c)[0x55d12b2cde9c]
/usr/sbin/mysqld(_Z10sub_selectP4JOINP13st_join_tableb+0x1a9)[0x55d12afc7dd9]
/usr/sbin/mysqld(_ZN4JOIN10exec_innerEv+0xb9c)[0x55d12afea4cc]
/usr/sbin/mysqld(_ZN4JOIN4execEv+0x33)[0x55d12afea723]
/usr/sbin/mysqld(_Z12mysql_selectP3THDP10TABLE_LISTjR4ListI4ItemEPS4_jP8st_orderS9_S7_S9_yP13select_resultP18st_select_lex_unitP13st_select_lex+0x186)[0x55d12afe8a26]
/usr/sbin/mysqld(_Z13handle_selectP3THDP3LEXP13select_resultm+0x1d7)[0x55d12afe9597]
/usr/sbin/mysqld(+0x58dd2a)[0x55d12ae83d2a]
/usr/sbin/mysqld(_Z21mysql_execute_commandP3THD+0x4591)[0x55d12af90641]
/usr/sbin/mysqld(_ZN18Prepared_statement7executeEP6Stringb+0x4b6)[0x55d12afa8d06]
/usr/sbin/mysqld(_ZN18Prepared_statement12execute_loopEP6StringbPhS2_+0x92)[0x55d12afa8ec2]
/usr/sbin/mysqld(+0x6b3827)[0x55d12afa9827]
/usr/sbin/mysqld(_Z19mysqld_stmt_executeP3THDPcj+0x27)[0x55d12afa98b7]
/usr/sbin/mysqld(_Z16dispatch_command19enum_server_commandP3THDPcjbb+0x1625)[0x55d12af97d85]
/usr/sbin/mysqld(_Z10do_commandP3THD+0x11c)[0x55d12af99aac]
/usr/sbin/mysqld(_Z24do_handle_one_connectionP7CONNECT+0x1fa)[0x55d12b07718a]
/usr/sbin/mysqld(handle_one_connection+0x3d)[0x55d12b07726d]
pthread_create.c:0(start_thread)[0x7ff31532ae65]
/lib64/libc.so.6(clone+0x6d)[0x7ff3136cb88d]
Trying to get some variables.
Some pointers may be invalid and cause the dump to abort.
Query (0x55d12dc24b38): select * from `users` where (`role` = ? or
`role` = ?) and exists (select * from `email_templates` inner join
`users_email` on `email_template
s`.`id` = `users_email`.`email_template_id` where `users`.`id` =
`users_email`.`user_id` and `email_template_id` = ?) and
`users`.`deleted_at` is null
Connection ID (thread ID): 9
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_pushdow
n=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_increme
ntal=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
The manual page at http://dev.mysql.com/doc/mysql/en/crashing.html contains
information that should help you find out what is causing the crash.
Writing a core file...
Working directory at /var/lib/mysql
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 0 unlimited bytes
Max resident set unlimited unlimited bytes
Max processes 15028 15028
processes
Max open files 16364 16364 files
Max locked memory 65536 65536 bytes
Max address space unlimited unlimited bytes
Max file locks unlimited unlimited locks
Max pending signals 15028 15028 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: core
Thanks for any hint.
Kind Regards,
Thomas
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