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  1. MariaDB Server
  2. MDEV-26106

[ERROR] InnoDB: Unlock row could not find a 2 mode lock on the record

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    Details

    • Type: Bug
    • Status: Closed (View Workflow)
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 10.2, 10.3, 10.4, 10.5, 10.6
    • Fix Version/s: 10.5.12, 10.6.4
    • Component/s: Optimizer
    • Labels:
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      Description

      This is MariaDB's variant of https://bugs.mysql.com/bug.php?id=76803 .

      If there is an outer join with a constant inner table, a locking-read statement (UPDATE or SELECT... FOR UPDATE) will produce these kind of warnings in the error log:

      [ERROR] InnoDB: Unlock row could not find a 3 mode lock on the record. Current
      		 
      statement: SELECT * FROM t1 LEFT JOIN t2 ON t1.c2=t2.c2 AND t2.c1=1 FOR UPDATE

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            Assignee:
            psergei Sergei Petrunia
            Reporter:
            psergei Sergei Petrunia
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              Updated:
              Resolved:

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