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  1. Moodle
  2. MDL-66607

Random messaging failure

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Details

    • MOODLE_36_STABLE, MOODLE_37_STABLE, MOODLE_38_STABLE, MOODLE_39_STABLE
    • MOODLE_37_STABLE, MOODLE_38_STABLE
    • MDL-66607-master
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      CI

      Random fails should cease

      Integration

      You may wish to run the attached 66607.feature file a number of times.
      It is just a copy of the scenario which was picking this issue up but with many attempts.

      Note: Typically the issue is only seen on newer hardware as this was caused by a race conditioin.

      Show
      CI Random fails should cease Integration You may wish to run the attached 66607.feature file a number of times. It is just a copy of the scenario which was picking this issue up but with many attempts. Note: Typically the issue is only seen on newer hardware as this was caused by a race conditioin.
    • 2

    Description

      Copied from MDL-65493.

      It looks like the getLoadNewMessagesCallback function's callback publishes the MessageDrawerEvents.CONVERSATION_NEW_LAST_MESSAGE along with the conversation Id of the now deleted conversation at around the time that the conversation I also deleted, and I suspect that this causes it to be re-added.

      This happens in the resetMessagePollTimer for the backOffTimer.

      Essentially the timer was running, and a conversation did exist, but it was deleted before the PubSub completes. The Publish of the new last message event occurs after the conversation has been deleted, and as a result it gets re-created.

      I'm not sure how best to fix this one. A few things spring to mind, but they may not be ideal...

      1. stop timers, and cancel any ongoing requests while dialogues are open or not on the relevant screen
      2. ??
        Not really sure as I don't know enough about the messaging code.

      Basically, this is a real race condition. We've not detected it before because of the other issues (which are largely fixed in this MDL).

      Attachments

        Issue Links

          Discovered while testing

          Bug - A problem which impairs or prevents Moodle from functioning correctly. MDL-65493 Random failures on Messaging (Clean and 36_STABLE)

          • Minor - Minor loss of function where workaround is possible
          • Closed
          has a non-specific relationship to

          Bug - A problem which impairs or prevents Moodle from functioning correctly. MDL-66227 Duplicate conversation shown in Messages summary page

          • Minor - Minor loss of function where workaround is possible
          • Open
          will be (partly) resolved by

          Bug - A problem which impairs or prevents Moodle from functioning correctly. MDL-67600 Add @randomfails tag to random behat fails

          • Minor - Minor loss of function where workaround is possible
          • Open

          Activity

            People

              dobedobedoh Andrew Lyons
              dobedobedoh Andrew Lyons
              Amaia Anabitarte Amaia Anabitarte
              Eloy Lafuente (stronk7) Eloy Lafuente (stronk7)
              CiBoT CiBoT
              Amaia Anabitarte, Carlos Escobedo, Ferran Recio, Ilya Tregubov, Laurent David, Sara Arjona (@sarjona)
              Votes:
              3 Vote for this issue
              Watchers:
              8 Start watching this issue

              Dates

                Created:
                Updated:
                Resolved:
                11/May/20

                Time Tracking

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                  6h 52m