mysqld[51721]: 200625 19:30:19 [ERROR] mysqld got signal 11 ; mysqld[51721]: This could be because you hit a bug. It is also possible that this binary mysqld[51721]: or one of the libraries it was linked against is corrupt, improperly built, mysqld[51721]: or misconfigured. This error can also be caused by malfunctioning hardware. mysqld[51721]: To report this bug, see https://mariadb.com/kb/en/reporting-bugs mysqld[51721]: We will try our best to scrape up some info that will hopefully help mysqld[51721]: diagnose the problem, but since we have already crashed, mysqld[51721]: something is definitely wrong and this may fail. mysqld[51721]: Server version: 10.4.13-MariaDB mysqld[51721]: key_buffer_size=134217728 mysqld[51721]: read_buffer_size=131072 mysqld[51721]: max_used_connections=11 mysqld[51721]: max_threads=153 mysqld[51721]: thread_count=17 mysqld[51721]: It is possible that mysqld could use up to mysqld[51721]: key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 467756 K bytes of memory mysqld[51721]: Hope that's ok; if not, decrease some variables in the equation. mysqld[51721]: Thread pointer: 0x7f6c1cc749c8 mysqld[51721]: Attempting backtrace. You can use the following information to find out mysqld[51721]: where mysqld died. If you see no messages after this, something went mysqld[51721]: terribly wrong... mysqld[51721]: stack_bottom = 0x7f6c121675b8 thread_stack 0x49000 mysqld[51721]: /usr/bin/mysqld(my_print_stacktrace+0x2a)[0x55c5be9f24ea] mysqld[51721]: /usr/bin/mysqld(handle_fatal_signal+0x578)[0x55c5be5099f8] mysqld[51721]: sigaction.c:0(__restore_rt)[0x7f6c32da7960] mysqld[51721]: /usr/bin/mysqld(_ZN12Item_func_in7cleanupEv+0x2e)[0x55c5be637d4e] mysqld[51721]: /usr/bin/mysqld(_ZN11Query_arena10free_itemsEv+0x21)[0x55c5be2bcff1] mysqld[51721]: /usr/bin/mysqld(_ZN3THD19cleanup_after_queryEv+0x11d)[0x55c5be2bee5d] mysqld[51721]: /usr/bin/mysqld(_Z11mysql_parseP3THDPcjP12Parser_statebb+0x261)[0x55c5be30df71] mysqld[51721]: /usr/bin/mysqld(_Z16dispatch_command19enum_server_commandP3THDPcjbb+0x1d34)[0x55c5be310de4] mysqld[51721]: /usr/bin/mysqld(_Z10do_commandP3THD+0x105)[0x55c5be312625] mysqld[51721]: /usr/bin/mysqld(_Z24do_handle_one_connectionP7CONNECT+0x1c6)[0x55c5be3f6936] mysqld[51721]: /usr/bin/mysqld(handle_one_connection+0x33)[0x55c5be3f6a73] mysqld[51721]: pthread_create.c:0(start_thread)[0x7f6c32d9c422] mysqld[51721]: :0(__GI___clone)[0x7f6c3256fbf3] mysqld[51721]: Trying to get some variables. mysqld[51721]: Some pointers may be invalid and cause the dump to abort. mysqld[51721]: Query (0x7f6c1ccd3560): CREATE INDEX ix_listarchiver_mailing_list_id ON listarchiver (mailing_list_id) mysqld[51721]: Connection ID (thread ID): 20 mysqld[51721]: Status: NOT_KILLED mysqld[51721]: 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 mysqld[51721]: The manual page at http://dev.mysql.com/doc/mysql/en/crashing.html contains mysqld[51721]: information that should help you find out what is causing the crash. mysqld[51721]: Writing a core file... mysqld[51721]: Working directory at /var/lib/mysql mysqld[51721]: Resource Limits: mysqld[51721]: Limit Soft Limit Hard Limit Units mysqld[51721]: Max cpu time unlimited unlimited seconds mysqld[51721]: Max file size unlimited unlimited bytes mysqld[51721]: Max data size unlimited unlimited bytes mysqld[51721]: Max stack size 8388608 unlimited bytes mysqld[51721]: Max core file size unlimited unlimited bytes mysqld[51721]: Max resident set unlimited unlimited bytes mysqld[51721]: Max processes 31781 31781 processes mysqld[51721]: Max open files 16364 16364 files mysqld[51721]: Max locked memory 65536 65536 bytes mysqld[51721]: Max address space unlimited unlimited bytes mysqld[51721]: Max file locks unlimited unlimited locks mysqld[51721]: Max pending signals 31781 31781 signals mysqld[51721]: Max msgqueue size 819200 819200 bytes mysqld[51721]: Max nice priority 0 0 mysqld[51721]: Max realtime priority 0 0 mysqld[51721]: Max realtime timeout unlimited unlimited us mysqld[51721]: Core pattern: |/usr/lib/systemd/systemd-coredump %P %u %g %s %t %c ... systemd[1]: mariadb.service: Main process exited, code=killed, status=11/SEGV systemd[1]: mariadb.service: Failed with result 'signal'. systemd[1]: mariadb.service: Scheduled restart job, restart counter is at 2. systemd[1]: Stopped MariaDB 10.4.13 database server.