Feb  1 10:27:10 dbserver mysqld: 2021-02-01 10:27:10 10918367 [ERROR] [FATAL] InnoDB: Unknown error Required history data has been deleted
Feb  1 10:27:10 dbserver mysqld: 210201 10:27:10 [ERROR] mysqld got signal 6 ;
Feb  1 10:27:10 dbserver mysqld: This could be because you hit a bug. It is also possible that this binary
Feb  1 10:27:10 dbserver mysqld: or one of the libraries it was linked against is corrupt, improperly built,
Feb  1 10:27:10 dbserver mysqld: or misconfigured. This error can also be caused by malfunctioning hardware.
Feb  1 10:27:10 dbserver mysqld: To report this bug, see https://mariadb.com/kb/en/reporting-bugs
Feb  1 10:27:10 dbserver mysqld: We will try our best to scrape up some info that will hopefully help
Feb  1 10:27:10 dbserver mysqld: diagnose the problem, but since we have already crashed,
Feb  1 10:27:10 dbserver mysqld: something is definitely wrong and this may fail.
Feb  1 10:27:10 dbserver mysqld: Server version: 10.3.27-MariaDB-log
Feb  1 10:27:10 dbserver mysqld: key_buffer_size=134217728
Feb  1 10:27:10 dbserver mysqld: read_buffer_size=131072
Feb  1 10:27:10 dbserver mysqld: max_used_connections=79
Feb  1 10:27:10 dbserver mysqld: max_threads=302
Feb  1 10:27:10 dbserver mysqld: thread_count=95
Feb  1 10:27:10 dbserver mysqld: It is possible that mysqld could use up to
Feb  1 10:27:10 dbserver mysqld: key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 795005 K  bytes of memory
Feb  1 10:27:10 dbserver mysqld: Hope that's ok; if not, decrease some variables in the equation.
Feb  1 10:27:10 dbserver mysqld: Thread pointer: 0x7f3fc80009a8
Feb  1 10:27:10 dbserver mysqld: Attempting backtrace. You can use the following information to find out
Feb  1 10:27:10 dbserver mysqld: where mysqld died. If you see no messages after this, something went
Feb  1 10:27:10 dbserver mysqld: terribly wrong...
Feb  1 10:27:10 dbserver mysqld: stack_bottom = 0x7f40e72b7d30 thread_stack 0x49000
Feb  1 10:27:10 dbserver mysqld: /usr/sbin/mysqld(my_print_stacktrace+0x2e)[0x56413c61c66e]
Feb  1 10:27:11 dbserver mysqld: /usr/sbin/mysqld(handle_fatal_signal+0x30f)[0x56413c0b3e7f]
Feb  1 10:27:11 dbserver mysqld: /lib64/libpthread.so.0(+0xf630)[0x7f4d98a3f630]
Feb  1 10:27:12 dbserver mysqld: /lib64/libc.so.6(gsignal+0x37)[0x7f4d96d0f387]
Feb  1 10:27:12 dbserver mysqld: /lib64/libc.so.6(abort+0x148)[0x7f4d96d10a78]
Feb  1 10:27:13 dbserver mysqld: /usr/sbin/mysqld(+0xaa0b73)[0x56413c3a4b73]
Feb  1 10:27:13 dbserver mysqld: /usr/sbin/mysqld(+0xa15f17)[0x56413c319f17]
Feb  1 10:27:14 dbserver mysqld: /usr/sbin/mysqld(+0xa34c48)[0x56413c338c48]
Feb  1 10:27:14 dbserver mysqld: /usr/sbin/mysqld(+0x955877)[0x56413c259877]
Feb  1 10:27:15 dbserver mysqld: /usr/sbin/mysqld(_ZN7handler13ha_index_nextEPh+0x19f)[0x56413c0b9cbf]
Feb  1 10:27:15 dbserver mysqld: /usr/sbin/mysqld(_ZN7handler15read_range_nextEv+0x20)[0x56413c0be440]
Feb  1 10:27:16 dbserver mysqld: /usr/sbin/mysqld(_ZN7handler21multi_range_read_nextEPPv+0xb2)[0x56413bfe0c22]
Feb  1 10:27:16 dbserver mysqld: /usr/sbin/mysqld(_ZN23Mrr_simple_index_reader8get_nextEPPv+0x20)[0x56413bfe0c90]
Feb  1 10:27:17 dbserver mysqld: /usr/sbin/mysqld(_ZN10DsMrr_impl10dsmrr_nextEPPv+0x42)[0x56413bfe1f02]
Feb  1 10:27:17 dbserver mysqld: /usr/sbin/mysqld(_ZN18QUICK_RANGE_SELECT8get_nextEv+0x99)[0x56413c1c45a9]
Feb  1 10:27:18 dbserver mysqld: /usr/sbin/mysqld(+0x8dfdb9)[0x56413c1e3db9]
Feb  1 10:27:18 dbserver mysqld: /usr/sbin/mysqld(_Z10sub_selectP4JOINP13st_join_tableb+0x211)[0x56413bf0c091]
Feb  1 10:27:18 dbserver mysqld: /usr/sbin/mysqld(_ZN4JOIN10exec_innerEv+0xa8b)[0x56413bf2effb]
Feb  1 10:27:19 dbserver mysqld: /usr/sbin/mysqld(_ZN4JOIN4execEv+0x33)[0x56413bf2f213]
Feb  1 10:27:19 dbserver mysqld: /usr/sbin/mysqld(_Z12mysql_selectP3THDP10TABLE_LISTjR4ListI4ItemEPS4_jP8st_orderS9_S7_S9_yP13select_resultP18st_select_lex_unitP13st_select_lex+0x11a)[0x56413bf2f36a]
Feb  1 10:27:20 dbserver mysqld: /usr/sbin/mysqld(_Z13handle_selectP3THDP3LEXP13select_resultm+0x1dc)[0x56413bf2fe8c]
Feb  1 10:27:21 dbserver mysqld: /usr/sbin/mysqld(+0x4dc0f9)[0x56413bde00f9]
Feb  1 10:27:21 dbserver mysqld: /usr/sbin/mysqld(_Z21mysql_execute_commandP3THD+0x21bc)[0x56413bed5c6c]
Feb  1 10:27:21 dbserver mysqld: /usr/sbin/mysqld(_Z11mysql_parseP3THDPcjP12Parser_statebb+0x1fb)[0x56413bedc6ab]
Feb  1 10:27:22 dbserver mysqld: /usr/sbin/mysqld(_Z16dispatch_command19enum_server_commandP3THDPcjbb+0xf76)[0x56413beddf26]
Feb  1 10:27:22 dbserver mysqld: /usr/sbin/mysqld(_Z10do_commandP3THD+0x11b)[0x56413bedfadb]
Feb  1 10:27:23 dbserver mysqld: /usr/sbin/mysqld(_Z24do_handle_one_connectionP7CONNECT+0x1d6)[0x56413bfb5706]
Feb  1 10:27:23 dbserver mysqld: /usr/sbin/mysqld(handle_one_connection+0x3d)[0x56413bfb581d]
Feb  1 10:27:24 dbserver mysqld: /lib64/libpthread.so.0(+0x7ea5)[0x7f4d98a37ea5]
Feb  1 10:27:24 dbserver mysqld: /lib64/libc.so.6(clone+0x6d)[0x7f4d96dd796d]
Feb  1 10:27:24 dbserver mysqld: Trying to get some variables.
Feb  1 10:27:24 dbserver mysqld: Some pointers may be invalid and cause the dump to abort.
Feb  1 10:27:24 dbserver mysqld: Query (0x7f3fc800f4e0): SELECT count(id) FROM jos__jobs WHERE process_id > 0 AND info='xxxxxxxx'
Feb  1 10:27:24 dbserver mysqld: Connection ID (thread ID): 10918367
Feb  1 10:27:24 dbserver mysqld: Status: NOT_KILLED
Feb  1 10:27:24 dbserver mysqld: 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=off,table_elimination=on,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_materialized=on