Details
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Bug
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Status: Closed (View Workflow)
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Critical
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Resolution: Fixed
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10.5, 10.3.17, 10.3.23, 10.5.4, 10.2(EOL), 10.3(EOL), 10.4(EOL)
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None
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CPanel on linux, Windows x64
Description
I'm getting a server crash when I issue a very simple DELETE statement "DELETE FROM companies WHERE CompanyID=749".
I believe it might have something to do with an "ON DELETE SET NULL" foreign key relationship and some indexes of virtual columns in the child table... but unfortunately I was unable to reproduce the problem as a simple testcase; it seems to depend somehow on the data in my existing DB.
I can however reliably repeat the crash if I issue the exact same DELETE statement.
Since I was unable to determine the specific cause, I can't tell if this is related to an already-reported bug or not.
The tables are all InnoDB, and running mysql_upgrade did not affect the issue.
The log contained the following:
190821 4:08:56 [ERROR] mysqld got signal 11 ;
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This could be because you hit a bug. It is also possible that this binary
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or one of the libraries it was linked against is corrupt, improperly built,
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or misconfigured. This error can also be caused by malfunctioning hardware.
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To report this bug, see https://mariadb.com/kb/en/reporting-bugs
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We will try our best to scrape up some info that will hopefully help
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diagnose the problem, but since we have already crashed,
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something is definitely wrong and this may fail.
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Server version: 10.3.17-MariaDB
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key_buffer_size=134217728
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read_buffer_size=131072
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max_used_connections=2
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max_threads=153
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thread_count=8
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It is possible that mysqld could use up to
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key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 467422 K bytes of memory
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Hope that's ok; if not, decrease some variables in the equation.
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Thread pointer: 0x55a1b0836658
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Attempting backtrace. You can use the following information to find out
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where mysqld died. If you see no messages after this, something went
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terribly wrong...
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stack_bottom = 0x7f17c45a8d30 thread_stack 0x49000
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/usr/sbin/mysqld(my_print_stacktrace+0x2e)[0x55a1adf3f93e]
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/usr/sbin/mysqld(handle_fatal_signal+0x30f)[0x55a1ad9df2af]sigaction.c:0(__restore_rt)[0x7f17d4b355d0]
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/usr/sbin/mysqld(+0xa174fd)[0x55a1adc6d4fd]
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/usr/sbin/mysqld(+0xa17ddc)[0x55a1adc6dddc]
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/usr/sbin/mysqld(+0xa18ff4)[0x55a1adc6eff4]
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/usr/sbin/mysqld(+0x9ea141)[0x55a1adc40141]
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/usr/sbin/mysqld(+0x9d35c2)[0x55a1adc295c2]
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/usr/sbin/mysqld(+0xa12a78)[0x55a1adc68a78]
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/usr/sbin/mysqld(+0xa18809)[0x55a1adc6e809]
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/usr/sbin/mysqld(+0xa18ff4)[0x55a1adc6eff4]
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/usr/sbin/mysqld(+0x9e9c0b)[0x55a1adc3fc0b]
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/usr/sbin/mysqld(+0x926c1c)[0x55a1adb7cc1c]
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/usr/sbin/mysqld(_ZN7handler13ha_delete_rowEPKh+0x19f)[0x55a1ad9eb01f]
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/usr/sbin/mysqld(_Z12mysql_deleteP3THDP10TABLE_LISTP4ItemP10SQL_I_ListI8st_orderEyyP13select_result+0x14e8)[0x55a1adb1fa68]
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/usr/sbin/mysqld(_Z21mysql_execute_commandP3THD+0x25d1)[0x55a1ad803611]
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/usr/sbin/mysqld(_Z11mysql_parseP3THDPcjP12Parser_statebb+0x22b)[0x55a1ad809c2b]
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/usr/sbin/mysqld(_Z16dispatch_command19enum_server_commandP3THDPcjbb+0x1c9f)[0x55a1ad80c80f]
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/usr/sbin/mysqld(_Z10do_commandP3THD+0x13e)[0x55a1ad80d74e]
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/usr/sbin/mysqld(_Z24do_handle_one_connectionP7CONNECT+0x221)[0x55a1ad8e0f61]
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/usr/sbin/mysqld(handle_one_connection+0x3d)[0x55a1ad8e102d]
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pthread_create.c:0(start_thread)[0x7f17d4b2ddd5]
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/lib64/libc.so.6(clone+0x6d)[0x7f17d2ed002d]
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Trying to get some variables.
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Some pointers may be invalid and cause the dump to abort.
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Query (0x55a1b08440d0): DELETE FROM companies WHERE CompanyID=749
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Connection ID (thread ID): 40
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Status: NOT_KILLED
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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
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The manual page at http://dev.mysql.com/doc/mysql/en/crashing.html contains
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information that should help you find out what is causing the crash.
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Writing a core file...
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Working directory at /var/lib/mysql
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Resource Limits:Limit Soft Limit Hard Limit Units
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Max cpu time unlimited unlimited seconds
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Max file size unlimited unlimited bytes
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Max data size unlimited unlimited bytes
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Max stack size 8388608 unlimited bytes
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Max core file size 0 unlimited bytes
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Max resident set unlimited unlimited bytes
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Max processes 7263 7263 processes
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Max open files 50000 50000 files
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Max locked memory 65536 65536 bytes
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Max address space unlimited unlimited bytes
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Max file locks unlimited unlimited locks
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Max pending signals 7263 7263 signals
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Max msgqueue size 819200 819200 bytes
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Max nice priority 0 0
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Max realtime priority 0 0
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Max realtime timeout unlimited unlimited us
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Core pattern: core
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Attachments
Issue Links
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