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  1. MariaDB Server
  2. MDEV-25269

Crash: exception 0xc0000005

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    Details

    • Type: Bug
    • Status: Closed (View Workflow)
    • Priority: Critical
    • Resolution: Duplicate
    • Affects Version/s: 10.5.9
    • Fix Version/s: N/A
    • Component/s: Optimizer
    • Labels:
      None

      Description

      Getting a reproducible crash that can be generated with a specific query that we make on a proprietary set of database data (so I can't post details here yet). Storage engine is InnoDB. Appears to be a regression in 10.5.9, as the query works fine in 10.5.8 and in our current production release 10.1.10.

      Query DOES have multiple large IN / NOT IN statements - possibly same thing as MDEV-24953 which presumably was related to whatever fix was pushed for MDEV-9750?

      Should be noted that this particular query works fine for smaller data-sets (again, smaller IN/NOT IN) values but for a larger database, it crashes every time.

      From the .err log:

      Server version: 10.5.9-MariaDB
      key_buffer_size=134217728
      read_buffer_size=131072
      max_used_connections=22
      max_threads=65537
      thread_count=3
      It is possible that mysqld could use up to
      key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 154448 K bytes of memory
      Hope that's ok; if not, decrease some variables in the equation.

      Thread pointer: 0x1b98a3bd028
      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...
      server.dll!and_all_keys()[opt_range.cc:9816]
      server.dll!key_and_with_limit()[opt_range.cc:10066]
      server.dll!and_range_trees()[opt_range.cc:9151]
      server.dll!tree_and()[opt_range.cc:9263]
      server.dll!Item_cond_and::get_mm_tree()[opt_range.cc:8315]
      server.dll!SQL_SELECT::test_quick_select()[opt_range.cc:2880]
      server.dll!get_quick_record_count()[sql_select.cc:4763]
      server.dll!make_join_statistics()[sql_select.cc:5494]
      server.dll!JOIN::optimize_inner()[sql_select.cc:2256]
      server.dll!JOIN::optimize()[sql_select.cc:1629]
      server.dll!st_select_lex_unit::optimize()[sql_union.cc:2126]
      server.dll!st_select_lex_unit::exec()[sql_union.cc:2157]
      server.dll!mysql_union()[sql_union.cc:41]
      server.dll!handle_select()[sql_select.cc:433]
      server.dll!execute_sqlcom_select()[sql_parse.cc:6282]
      server.dll!mysql_execute_command()[sql_parse.cc:3978]
      server.dll!mysql_parse()[sql_parse.cc:8067]
      server.dll!dispatch_command()[sql_parse.cc:1892]
      server.dll!do_command()[sql_parse.cc:1370]
      server.dll!threadpool_process_request()[threadpool_common.cc:363]
      server.dll!tp_callback()[threadpool_common.cc:194]
      ntdll.dll!RtlInitializeCriticalSection()
      ntdll.dll!RtlReleaseSRWLockExclusive()
      KERNEL32.DLL!BaseThreadInitThunk()
      ntdll.dll!RtlUserThreadStart()

      If we get time, we can try to generate a sanitized version of the dataset, but we're trying to get a relatively important release out the door. Can offer a remote session if it helps someone debug more quickly (and can show the query and results directly).

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              Assignee:
              Unassigned Unassigned
              Reporter:
              cmerchan@gmail.com Clark Merchant
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                Dates

                Created:
                Updated:
                Resolved:

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