Simple 4.4.0-rc7 repset test - restarted member not catching up on oplog [or count drift]

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    • Type: Bug
    • Resolution: Won't Fix
    • Priority: Major - P3
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    • Affects Version/s: 4.4.0-rc7
    • Component/s: Replication
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    • Environment:
      Ubuntu 20.04
    • ALL
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      Follow this process: https://github.com/pkdone/MongoDB-AUTO-HA

      In mointor.sh replace .countDocuments({}) with the old method that was being used: .count()

      Increase the rate of document insertion by reducing the sleep in insert.py from 0.025s to 0.005s to make the count variance appear faster/more obvious

      Ensure laptop/workstation is under load/strain and you may need to kill three or four primaries before witnessing the behaviour

      Show
      Follow this process:  https://github.com/pkdone/MongoDB-AUTO-HA In  mointor.sh replace .countDocuments({}) with the old method that was being used:  .count() Increase the rate of document insertion by reducing the sleep in  insert.py  from 0.025s to 0.005s to make the count variance appear faster/more obvious Ensure laptop/workstation is under load/strain and you may need to kill three or four primaries before witnessing the behaviour
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      Simple replicat set test of 3 mongod servers as part of one replica set  works fine on 4.2.6 and many other earlier versions of mongodb over the years.

      Just tried on 4.4.0-rc7 and when a primary is killed and then restarted it does not seem to catch-up on the oplog.

      To reproduce follow this process: https://github.com/pkdone/MongoDB-AUTO-HA

      More info to follow below

        1. SERVER-48675.png
          SERVER-48675.png
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        2. SERVER-48675-440-rc11.tgz
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        3. server-48765.tgz
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            Assignee:
            Bruce Lucas (Inactive)
            Reporter:
            Paul Done
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              Created:
              Updated:
              Resolved: