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  1. MariaDB Server
  2. MDEV-12827

Assertion failure when reporting duplicate key error in online table rebuild

    Details

    • Sprint:
      10.2.12

      Description

      During OPTIMIZE TABLE a crash occurred with a backtrace that looks the same as in MDEV-5406.

      The fix back then included a comment saying

                  HACK HACK HACK
       
                  Prepare the list of keys for an error message. 
                  It must match what the engine does internally in ::add_index().
                  Here we emulate what innobase_create_key_def() does.
                  Luckily, in 10.0 this will go away.
      

      The code indeed seems to have changed in 10.1, so maybe the problem resurfaced this way?

      170514 2:50:40 [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: 10.1.19-MariaDB
      key_buffer_size=16777216
      read_buffer_size=262144
      max_used_connections=525
      max_threads=1002
      thread_count=246
      It is possible that mysqld could use up to
      key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 806479 K bytes of memory
      Hope that's ok; if not, decrease some variables in the equation.
       
      Thread pointer: 0x0x7f7d954eb008
      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 = 0x7eef5265b208 thread_stack 0x48400
      (my_addr_resolve failure: fork)
      /apps/mariadb/instances/sysmdbblpfrm/bin/mysqld(my_print_stacktrace+0x2e) [0xc0e2fe]
      /apps/mariadb/instances/sysmdbblpfrm/bin/mysqld(handle_fatal_signal+0x4ba) [0x76836a]
      /lib64/libpthread.so.0() [0x3fe2a0f7e0]
      /apps/mariadb/instances/sysmdbblpfrm/bin/mysqld(key_unpack(String*, TABLE*, st_key*)+0x95) [0x831c35]
      /apps/mariadb/instances/sysmdbblpfrm/bin/mysqld(print_keydup_error(TABLE*, st_key*, char const*, unsigned long)+0x76) [0x76e136]
      /apps/mariadb/instances/sysmdbblpfrm/bin/mysqld() [0x91c3e3]
      /apps/mariadb/instances/sysmdbblpfrm/bin/mysqld() [0x63ce0b]
      /apps/mariadb/instances/sysmdbblpfrm/bin/mysqld(mysql_alter_table(THD*, char*, char*, HA_CREATE_INFO*, TABLE_LIST*, Alter_info*, unsigned int, st_order*, bool)+0x3c42) [0x644812]
      /apps/mariadb/instances/sysmdbblpfrm/bin/mysqld(mysql_recreate_table(THD*, TABLE_LIST*, bool)+0x196) [0x644a26]
      /apps/mariadb/instances/sysmdbblpfrm/bin/mysqld() [0x69ba5e]
      /apps/mariadb/instances/sysmdbblpfrm/bin/mysqld() [0x69d4da]
      /apps/mariadb/instances/sysmdbblpfrm/bin/mysqld(Sql_cmd_optimize_table::execute(THD*)+0xe6) [0x69e5d6]
      /apps/mariadb/instances/sysmdbblpfrm/bin/mysqld(mysql_execute_command(THD*)+0x13db) [0x5b38bb]
      /apps/mariadb/instances/sysmdbblpfrm/bin/mysqld(mysql_parse(THD*, char*, unsigned int, Parser_state*)+0x354) [0x5bbe54]
      /apps/mariadb/instances/sysmdbblpfrm/bin/mysqld() [0x5bbee8]
      /apps/mariadb/instances/sysmdbblpfrm/bin/mysqld(dispatch_command(enum_server_command, THD*, char*, unsigned int)+0x14e5) [0x5bdfc5]
      /apps/mariadb/instances/sysmdbblpfrm/bin/mysqld(do_command(THD*)+0x2a7) [0x5bf297]
      /apps/mariadb/instances/sysmdbblpfrm/bin/mysqld(do_handle_one_connection(THD*)+0x183) [0x68e853]
      /apps/mariadb/instances/sysmdbblpfrm/bin/mysqld(handle_one_connection+0x42) [0x68ea72]
      /lib64/libpthread.so.0() [0x3fe2a07aa1]
      /lib64/libc.so.6(clone+0x6d) [0x3fe22e8aad]
       
      Trying to get some variables.
      Some pointers may be invalid and cause the dump to abort.
      Query (0x7f7d80b92020): OPTIMIZE TABLE some_db.some_table
      Connection ID (thread ID): 10354269
      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,orderby_uses_equalities=off
      

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              • Assignee:
                marko Marko Mäkelä
                Reporter:
                hholzgra Hartmut Holzgraefe
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                • Created:
                  Updated:
                  Resolved: