Retrying setAllowMigrations command may end up in a deadlock

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    • Type: Bug
    • Resolution: Fixed
    • Priority: Major - P3
    • 7.1.0-rc0
    • Affects Version/s: None
    • Component/s: None
    • None
    • Fully Compatible
    • ALL
    • Sharding EMEA 2023-06-26, Sharding EMEA 2023-07-10
    • 140
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    • 3
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      Retrying the setAllowMigrations command with a session and a txnNum (retryableWrite:true) may end up with a deadlock, competing for a session checkout and the _kChunkOpLock acquisition, as it's shown below:

       

      First cmd: session checkout > lock _kChunkOpLock > session check-in > transaction happens > session checkout > unlock _kChunkOpLock
      Second cmd: session checkout > lock _kChunkOpLock > session check-in > transaction happens > session checkout > unlock _kChunkOpLock

            Assignee:
            Marcos José Grillo Ramirez
            Reporter:
            Silvia Surroca
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              Created:
              Updated:
              Resolved: