Uploaded image for project: 'Core Server'
  1. Core Server
  2. SERVER-39934

CurOp::completeAndLogOperation should not hang waiting for global lock

    • Type: Icon: Bug Bug
    • Resolution: Fixed
    • Priority: Icon: Major - P3 Major - P3
    • 4.0.9, 4.1.10
    • Affects Version/s: None
    • Component/s: Concurrency
    • None
    • Fully Compatible
    • ALL
    • v4.0
    • Storage Engines 2019-03-11, Storage Engines 2019-03-25
    • 32
    • 8

      When logging a command (either slow or when forced logging is enabled) CurOp::completeAndLogOperation attempts to take a global lock to obtain storage statistics. If something else has a Global X lock (or an enqueued Global X lock), this lock acquisition will stall behind that operation. This introduces an undesirable dependency on the global lock for otherwise lock-free operations such as $currentOp.

      We should give this acquisition a very short deadline and elide the storage stats when it is not available.

            Assignee:
            sulabh.mahajan@mongodb.com Sulabh Mahajan
            Reporter:
            matthew.russotto@mongodb.com Matthew Russotto
            Votes:
            0 Vote for this issue
            Watchers:
            12 Start watching this issue

              Created:
              Updated:
              Resolved: