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  1. MariaDB Server
  2. MDEV-12523

MariaDB server crash with METADATA_LOCK_INFO Plugin

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      Description

      While running the below query MariaDB server is getting crash.

      SELECT PCU.THREAD_ID, TH.processlist_id , PCU.EVENT_ID, PCU.SQL_TEXT , PCU.ROWS_AFFECTED FROM performance_schema.threads TH, performance_schema.events_statements_history PCU WHERE TH.THREAD_ID=PCU.THREAD_ID AND TH.processlist_id IN (SELECT DISTINCT(THREAD_ID) FROM INFORMATION_SCHEMA.metadata_lock_info)
      

      Here is the error log details.

      170417  7:30:01 [ERROR] mysqld got signal 11 ;
      This could be because you hit a bug. It is also possible that this binary
      or one of the libraries it was linked against is corrupt, improperly built,
      or misconfigured. This error can also be caused by malfunctioning hardware.
      To report this bug, see http://kb.askmonty.org/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: 10.0.19-MariaDB-log
      key_buffer_size=134217728
      read_buffer_size=1048576
      max_used_connections=2459
      max_threads=4002
      thread_count=253
      It is possible that mysqld could use up to 
      key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 8406281 K  bytes of memory
      Hope that's ok; if not, decrease some variables in the equation.
      Thread pointer: 0x0x7f950f4ba008
      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 = 0x7f9533e91de0 thread_stack 0x48000
      mysys/stacktrace.c:247(my_print_stacktrace)[0xbca37e]
      sql/signal_handler.cc:153(handle_fatal_signal)[0x71fe5c]
      /lib64/libpthread.so.0[0x32cec0f710]
      /MARIA/mariadb/lib/plugin/metadata_lock_info.so(_Z31i_s_metadata_lock_info_fill_rowP10MDL_ticketPv+0x126)[0x7f98f2d72e96]
      sql/mdl.cc:713(mdl_iterate_lock)[0x677c5d]
      /MARIA/mariadb/lib/plugin/metadata_lock_info.so(_Z33i_s_metadata_lock_info_fill_tableP3THDP10TABLE_LISTP4Item+0x27)[0x7f98f2d72d67]
      sql/sql_show.cc:8159(get_schema_tables_result(JOIN*, enum_schema_table_state))[0x5f5121]
      sql/sql_select.cc:2532(JOIN::exec_inner())[0x5ef045]
      sql/sql_select.cc:2370(JOIN::exec())[0x5edd2a]
      sql/sql_select.cc:373(handle_select(THD*, LEX*, select_result*, unsigned long))[0x5f195d]
      sql/sql_parse.cc:5275(execute_sqlcom_select)[0x5957d0]
      sql/sql_parse.cc:2562(mysql_execute_command(THD*))[0x598427]
      sql/sql_parse.cc:6529(mysql_parse(THD*, char*, unsigned int, Parser_state*))[0x59f866]
      sql/sql_parse.cc:1310(dispatch_command(enum_server_command, THD*, char*, unsigned int))[0x5a1797]
      sql/sql_parse.cc:999(do_command(THD*))[0x5a1ed9]
      sql/sql_connect.cc:1375(do_handle_one_connection(THD*))[0x66bfd4]
      sql/sql_connect.cc:1291(handle_one_connection)[0x66c112]
      perfschema/pfs.cc:1863(pfs_spawn_thread)[0xa83f49]
      /lib64/libpthread.so.0[0x32cec079d1]
      /lib64/libc.so.6(clone+0x6d)[0x32ce8e8b6d]
      Trying to get some variables.
      Some pointers may be invalid and cause the dump to abort.
      Query (0x7f9398bec020): SELECT PCU.THREAD_ID, TH.processlist_id , PCU.EVENT_ID, PCU.SQL_TEXT , PCU.ROWS_AFFECTED FROM performance_schema.threads TH, performance_schema.events_statements_history PCU WHERE TH.THREAD_ID=PCU.THREAD_ID AND TH.processlist_id IN (SELECT DISTINCT(THREAD_ID) FROM INFORMATION_SCHEMA.metadata_lock_info)
      Connection ID (thread ID): 6259347
      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,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
      The manual page at http://dev.mysql.com/doc/mysql/en/crashing.html contains
      information that should help you find out what is causing the crash.
      170417 07:30:03 mysqld_safe Number of processes running now: 0
      170417 07:30:03 mysqld_safe mysqld restarted
      

      I found one bug related to this https://jira.mariadb.org/browse/MDEV-9486 but not sure if both are same or different.

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              • Assignee:
                Unassigned
                Reporter:
                niljoshi Nilnandan Joshi
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                • Created:
                  Updated:
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