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  1. Core Server
  2. SERVER-55376

Reconfig can roll back committed writes in PSA sets

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Details

    • Bug
    • Status: Closed
    • Major - P3
    • Resolution: Fixed
    • None
    • 4.4.11, 5.0.0-rc0
    • Replication
    • None
    • Fully Compatible
    • ALL
    • v4.4
    • Repl 2021-04-05, Repl 2021-04-19, Repl 2021-05-17

    Description

      1. Consider a PSA set in config C0.
      2. We then reconfig to C1 where the "S" node has votes:0.
      3. The "S" node goes down and falls behind as the Primary accepts and commits many writes.
      4. The "S" node restarts.
      5. Now the DBA reconfigures the "S" node to have votes:1 again in C2.
      6. The "S" node gets elected with the arbiter's vote, but without all of the writes the original primary committed while "S" was down.

      Attachments

        Issue Links

          depends on

          Bug - A problem which impairs or prevents the functions of the product. SERVER-60217 [v5.0] enableReconfigRollbackCommittedWritesCheck should be applied on 4.4

          • Major - P3 - Major loss of function.
          • Closed
          is depended on by

          Bug - A problem which impairs or prevents the functions of the product. SERVER-56670 Ensure reconfig cannot roll back committed writes in replica sets with multiple arbiters

          • Major - P3 - Major loss of function.
          • Closed
          is documented by

          Task - A task that needs to be done. DOCS-14446 Investigate changes in SERVER-55376: Reconfig can roll back committed writes in PSA sets

          • Major - P3 - Major loss of function.
          • Closed
          is related to

          Task - A task that needs to be done. SERVER-56481 Update TLA+ spec for reconfig to model arbiters

          • Major - P3 - Major loss of function.
          • Open
          related to

          Task - A task that needs to be done. MONGOSH-891 Add check for PSA set in reconfigForPSASet()

          • Minor - P4 - Minor loss of function, or other problem where easy workaround is present.
          • Open

          Task - A task that needs to be done. MONGOSH-702 Create a shell helper to reconfig from a PA to a PSA set

          • Major - P3 - Major loss of function.
          • Closed

          Task - A task that needs to be done. SERVER-56801 Update placeholder links for the reconfig check in PSA sets

          • Major - P3 - Major loss of function.
          • Closed

          Improvement - An improvement or enhancement to an existing feature or task. SERVER-56919 Add validation for memberIndex to reconfigToPSASet() shell helper

          • Major - P3 - Major loss of function.
          • Closed

          Activity

            People

              xuerui.fa@mongodb.com Xuerui Fa
              judah.schvimer@mongodb.com Judah Schvimer
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              Dates

                Created:
                Updated:
                Resolved: