Details
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Bug
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Status: Closed (View Workflow)
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Major
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Resolution: Fixed
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10.3.15
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None
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CentOS 7, x86-64
Description
# mysql
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Welcome to the MariaDB monitor. Commands end with ; or \g.
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Your MariaDB connection id is 10
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Server version: 10.3.15-MariaDB-log MariaDB Server
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Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.
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Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
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MariaDB [(none)]> use information_schema
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Reading table information for completion of table and column names
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You can turn off this feature to get a quicker startup with -A
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Database changed
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MariaDB [information_schema]> show tables;
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ERROR 2006 (HY000): MySQL server has gone away
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No connection. Trying to reconnect...
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ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (111)
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ERROR: Can't connect to the server
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unknown [information_schema]>
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190608 16:16:40 [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: 10.3.15-MariaDB-log
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key_buffer_size=134217728
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read_buffer_size=131072
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max_used_connections=4
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max_threads=153
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thread_count=11
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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 = 467420 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: 0x7f6e040009a8
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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 = 0x7f6e62f27d00 thread_stack 0x49000
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/usr/sbin/mysqld(my_print_stacktrace+0x2e)[0x55f02512391e]
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/usr/sbin/mysqld(handle_fatal_signal+0x30f)[0x55f024bc053f]
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sigaction.c:0(__restore_rt)[0x7f6e7527c5d0]
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/usr/sbin/mysqld(+0xd1acb7)[0x55f02515ccb7]
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/usr/sbin/mysqld(_Z17find_schema_tableP3THDPK25st_mysql_const_lex_stringPb+0x55)[0x55f024a596b5]
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/usr/sbin/mysqld(_Z11open_tablesP3THDRK14DDL_options_stPP10TABLE_LISTPjPP19Sroutine_hash_entryjP19Prelocking_strategy+0x942)[0x55f024990632]
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/usr/sbin/mysqld(_Z30open_normal_and_derived_tablesP3THDP10TABLE_LISTjj+0x67)[0x55f024991217]
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/usr/sbin/mysqld(_Z18mysqld_list_fieldsP3THDP10TABLE_LISTPKc+0x35)[0x55f024a49415]
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/usr/sbin/mysqld(_Z16dispatch_command19enum_server_commandP3THDPcjbb+0x24ad)[0x55f0249f404d]
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/usr/sbin/mysqld(_Z10do_commandP3THD+0x13e)[0x55f0249f473e]
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/usr/sbin/mysqld(_Z24do_handle_one_connectionP7CONNECT+0x1aa)[0x55f024ac579a]
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/usr/sbin/mysqld(handle_one_connection+0x3d)[0x55f024ac58bd]
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/usr/sbin/mysqld(+0xc9629d)[0x55f0250d829d]
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pthread_create.c:0(start_thread)[0x7f6e75274dd5]
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/lib64/libc.so.6(clone+0x6d)[0x7f6e73616ead]
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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 (0x7f6e0400f4a0):
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Connection ID (thread ID): 23
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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:
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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 63309 63309 processes
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Max open files 16364 16364 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 63309 63309 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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This is related to full loading of table structures in information_schema by the mysql client on database change. Starting mysql client with mysql -A results in a workable information_schema. Manually doing "SHOW CREATE TABLE" on each of the tables in the information_schema or "SELECT * FROM" each of the tables doesn't result in the segfault.
Attachments
Issue Links
- is duplicated by
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MDEV-19490 show tables fails when selecting the information_schema database
- Closed