Unexpected Signal 11 crash on high load

socket=/dbStore/mysql/mysql.sock

default_storage_engine=InnoDB

innodb_file_per_table=1

innodb_buffer_pool_size=22500M

table_open_cache=15000

open_files_limit=36000

max_connections=6000

join_buffer_size=512K

tmp_table_size=32M

max_heap_table_size=32M

tmpdir=/dbStore/mysqlTmp/

innodb_data_home_dir=/dbStore/mysql/ibdata

innodb_buffer_pool_instances=4

innodb_flush_log_at_trx_commit=2

innodb_log_file_size=750M

lower_case_table_names=1

datadir=/dbStore/mysql/data

241114 14:12:49 [ERROR] mysqld got signal 11 ;

Sorry, we probably made a mistake, and this is a bug.

Your assistance in bug reporting will enable us to fix this for the next release.

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: 11.4.4-MariaDB-ubu2404-log source revision: e9a502df08bad16aa8a354e854f3c014b1380e32

key_buffer_size=134217728

read_buffer_size=131072

max_used_connections=86

max_threads=6002

thread_count=86

It is possible that mysqld could use up to

key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 13352091 K  bytes of memory

Hope that's ok; if not, decrease some variables in the equation.

Thread pointer: 0x6395c27f8228

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 = 0x749383401000 thread_stack 0x49000

Printing to addr2line failed

/usr/sbin/mariadbd(my_print_stacktrace+0x32)[0x6395bed77822]

/usr/sbin/mariadbd(handle_fatal_signal+0x2c3)[0x6395be822603]

/lib/x86_64-linux-gnu/libc.so.6(+0x45320)[0x7498da845320]

/usr/sbin/mariadbd(+0xff0761)[0x6395becf3761]

/usr/sbin/mariadbd(+0xf489cd)[0x6395bec4b9cd]

/usr/sbin/mariadbd(+0xf5ebfb)[0x6395bec61bfb]

/usr/sbin/mariadbd(+0xf6482e)[0x6395bec6782e]

/usr/sbin/mariadbd(+0xef29cd)[0x6395bebf59cd]

/usr/sbin/mariadbd(+0xef2d41)[0x6395bebf5d41]

/usr/sbin/mariadbd(+0xef4085)[0x6395bebf7085]

/usr/sbin/mariadbd(+0xeb6faa)[0x6395bebb9faa]

/usr/sbin/mariadbd(+0xf14567)[0x6395bec17567]

/usr/sbin/mariadbd(_ZN5tpool10task_group7executeEPNS_4taskE+0x7c)[0x6395bed0b1cc]

/usr/sbin/mariadbd(_ZN5tpool19thread_pool_generic11worker_mainEPNS_11worker_dataE+0x5f)[0x6395bed0975f]

/lib/x86_64-linux-gnu/libstdc++.so.6(+0xecdb4)[0x7498dacecdb4]

/lib/x86_64-linux-gnu/libc.so.6(+0x9ca94)[0x7498da89ca94]

/lib/x86_64-linux-gnu/libc.so.6(+0x129c3c)[0x7498da929c3c]

Trying to get some variables.

Some pointers may be invalid and cause the dump to abort.

Query (0x0): (null)

Connection ID (thread ID): 0

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,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,hash_join_cardinality=on,cset_narrowing=off,sargable_casefold=on

The manual page at https://mariadb.com/kb/en/how-to-produce-a-full-stack-trace-for-mariadbd/ 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 /dbStore/mysql/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        0                    unlimited            bytes

Max resident set          unlimited            unlimited            bytes

Max processes             128347               128347               processes

Max open files            32768                32768                files

Max locked memory         524288               524288               bytes

Max address space         unlimited            unlimited            bytes

Max file locks            unlimited            unlimited            locks

Max pending signals       128347               128347               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%p -s%s -c%c -d%d -P%P -u%u -g%g -- %E

Kernel version: Linux version 6.8.0-1017-azure (buildd@lcy02-amd64-065) (x86_64-linux-gnu-gcc-13 (Ubuntu 13.2.0-23ubuntu4) 13.2.0, GNU ld (GNU Binutils for Ubuntu) 2.42) #20-Ubuntu SMP Tue Oct 22 03:43:13 UTC 2024