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  1. MariaDB Server
  2. MDEV-10545

Server crashed in my_copy_fix_mb on querying I_S and P_S tables

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    • Sprint:
      10.1.20

      Description

      A user saw a crash similar to MDEV-8836 in MariaDB 10.1.14. The stack trace is:

      160810 16:54:28 [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 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: 10.1.14-MariaDB-enterprise
      key_buffer_size=67108864
      read_buffer_size=131072
      max_used_connections=10
      max_threads=502
      thread_count=7
      It is possible that mysqld could use up to 
      key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 1168150 K bytes of memory
      Hope that's ok; if not, decrease some variables in the equation.
       
      Thread pointer: 0x0x7f64c954c008
      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 = 0x7f657effd100 thread_stack 0x48400
      /usr/sbin/mysqld(my_print_stacktrace+0x2e)[0x7f65a35cb6ae]
      /usr/sbin/mysqld(handle_fatal_signal+0x38d)[0x7f65a30f720d]
      /lib64/libpthread.so.0(+0xf130)[0x7f65a2716130]
      /usr/sbin/mysqld(+0xab29e1)[0x7f65a35f89e1]
      /usr/sbin/mysqld(my_copy_fix_mb+0x49)[0x7f65a35e86f9]
      /usr/sbin/mysqld(_ZN13String_copier16well_formed_copyEPK15charset_info_stPcjS2_PKcjj+0x74)[0x7f65a2ff2a54]
      /usr/sbin/mysqld(_ZN10Field_blob5storeEPKcjPK15charset_info_st+0x26c)[0x7f65a30edbec]
      /usr/sbin/mysqld(_Z23fill_schema_processlistP3THDP10TABLE_LISTP4Item+0x58b)[0x7f65a2fdd1db]
      /usr/sbin/mysqld(_Z24get_schema_tables_resultP4JOIN23enum_schema_table_state+0x28e)[0x7f65a2fe697e]
      /usr/sbin/mysqld(_ZN4JOIN10exec_innerEv+0x6bd)[0x7f65a2fccefd]
      /usr/sbin/mysqld(_ZN4JOIN4execEv+0x54)[0x7f65a2fcf384]
      /usr/sbin/mysqld(_Z12mysql_selectP3THDPPP4ItemP10TABLE_LISTjR4ListIS1_ES2_jP8st_orderSB_S2_SB_yP13select_resultP18st_select_lex_unitP13st_select_lex+0x112)[0x7f65a2fcba32]
      /usr/sbin/mysqld(_Z13handle_selectP3THDP3LEXP13select_resultm+0x245)[0x7f65a2fcc505]
      /usr/sbin/mysqld(+0x428f91)[0x7f65a2f6ef91]
      /usr/sbin/mysqld(_Z21mysql_execute_commandP3THD+0x5f8f)[0x7f65a2f7ab9f]
      /usr/sbin/mysqld(_Z11mysql_parseP3THDPcjP12Parser_state+0x28e)[0x7f65a2f7e47e]
      /usr/sbin/mysqld(+0x438c89)[0x7f65a2f7ec89]
      /usr/sbin/mysqld(_Z16dispatch_command19enum_server_commandP3THDPcj+0x1fb0)[0x7f65a2f81310]
      /usr/sbin/mysqld(_Z10do_commandP3THD+0x169)[0x7f65a2f821b9]
      /usr/sbin/mysqld(_Z24do_handle_one_connectionP3THD+0x18a)[0x7f65a304592a]
      /usr/sbin/mysqld(handle_one_connection+0x40)[0x7f65a3045b00]
      /usr/sbin/mysqld(+0x962e9d)[0x7f65a34a8e9d]
      /lib64/libpthread.so.0(+0x7df3)[0x7f65a270edf3]
      /lib64/libc.so.6(clone+0x6d)[0x7f65a07273dd]
       
      Trying to get some variables.
      Some pointers may be invalid and cause the dump to abort.
      Query (0x7f65718df020): SELECT trx_id,trx_state,trx_started, trx_requested_lock_id,trx_wait_started, trx_weight,trx_mysql_thread_id,trx_query, trx_operation_state,trx_tables_in_use,trx_tables_locked, trx_lock_structs,trx_lock_memory_bytes,trx_rows_locked, trx_rows_modified,trx_concurrency_tickets,trx_isolation_level, trx_unique_checks,trx_foreign_key_checks,trx_last_foreign_key_error, trx_adaptive_hash_latched,trx_adaptive_hash_timeout, trx_is_read_only,trx_autocommit_non_locking, IFNULL(e.SQL_TEXT,'NULL'), IFNULL(e.MESSAGE_TEXT,'NULL'), e.ROWS_AFFECTED, e.ROWS_SENT, e.ROWS_EXAMINED,e.CREATED_TMP_DISK_TABLES, e.CREATED_TMP_TABLES,e.NO_INDEX_USED,e.NO_GOOD_INDEX_USED, IFNULL(p.USER,'cmon'), IFNULL(p.INFO,'NULL'), IFNULL(p.HOST,'NULL'), IFNULL(p.DB,'NULL'), IFNULL(x.blocking_trx_id, 'none'), UNIX_TIMESTAMP(NOW())-UNIX_TIMESTAMP(trx_started), NOW() FROM information_schema.innodb_trx t LEFT JOIN information_schema.processlist p on t.trx_mysql_thread_id=p.id LEFT JOIN information_schema.innodb_lock_waits x on t.trx_id=x.requesting_trx_id LEFT JOIN performance_schema.threads x on t.trx_mysql_thread_id=x.PROCESSLIST_ID LEFT JOIN performance_schema.events_statements_current e on e.THREAD_ID=x.THREAD_ID WHERE UNIX_TIMESTAMP(NOW())-UNIX_TIMESTAMP(trx_started)>10
      Connection ID (thread ID): 300479
      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=on,mrr_cost_based=on,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=o
      

      The query seems to be:

      SELECT trx_id,trx_state,trx_started, trx_requested_lock_id,trx_wait_started, trx_weight,trx_mysql_thread_id,trx_query, trx_operation_state,trx_tables_in_use,trx_tables_locked, trx_lock_structs,trx_lock_memory_bytes,trx_rows_locked, trx_rows_modified,trx_concurrency_tickets,trx_isolation_level, trx_unique_checks,trx_foreign_key_checks,trx_last_foreign_key_error, trx_adaptive_hash_latched,trx_adaptive_hash_timeout, trx_is_read_only,trx_autocommit_non_locking, IFNULL(e.SQL_TEXT,'NULL'), IFNULL(e.MESSAGE_TEXT,'NULL'), e.ROWS_AFFECTED, e.ROWS_SENT, e.ROWS_EXAMINED,e.CREATED_TMP_DISK_TABLES, e.CREATED_TMP_TABLES,e.NO_INDEX_USED,e.NO_GOOD_INDEX_USED, IFNULL(p.USER,'cmon'), IFNULL(p.INFO,'NULL'), IFNULL(p.HOST,'NULL'), IFNULL(p.DB,'NULL'), IFNULL(x.blocking_trx_id, 'none'), UNIX_TIMESTAMP(NOW())-UNIX_TIMESTAMP(trx_started), NOW() FROM information_schema.innodb_trx t LEFT JOIN information_schema.processlist p on t.trx_mysql_thread_id=p.id LEFT JOIN information_schema.innodb_lock_waits x on t.trx_id=x.requesting_trx_id LEFT JOIN performance_schema.threads x on t.trx_mysql_thread_id=x.PROCESSLIST_ID LEFT JOIN performance_schema.events_statements_current e on e.THREAD_ID=x.THREAD_ID WHERE UNIX_TIMESTAMP(NOW())-UNIX_TIMESTAMP(trx_started)>10
      

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              Assignee:
              nirbhay_c Nirbhay Choubey (Inactive)
              Reporter:
              GeoffMontee Geoff Montee
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                Created:
                Updated:
                Resolved:

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