Remove resharding's DonorStateEnum::kPreparingToBlockWrites state

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    • Type: Task
    • Resolution: Fixed
    • Priority: Major - P3
    • 5.0.0-rc0
    • Affects Version/s: None
    • Component/s: Sharding
    • None
    • Fully Compatible
    • Sharding 2021-05-17
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      Donor shards engage the critical section on the collection being resharded during the shard version refresh with CoordinatorStateEnum::kBlockingWrites. Not engaging the critical section during the shard version refresh would be data loss because on recovery, from a primary failover, the donor shard would be allowing new incoming writes possibly after it had written the final resharding oplog entries already.

      The DonorStateEnum::kPreparingToBlockWrites state therefore provides no benefit and can safely be removed.

            Assignee:
            Haley Connelly
            Reporter:
            Max Hirschhorn
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              Created:
              Updated:
              Resolved: