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  1. Core Server
  2. SERVER-40194

Revert SERVER-33248 on 4.0

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    Details

    • Type: Task
    • Status: Closed
    • Priority: Major - P3
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 4.0.8
    • Component/s: Replication
    • Labels:
      None
    • Backwards Compatibility:
      Fully Compatible
    • Sprint:
      Repl 2019-03-25, Repl 2019-04-08

      Description

      SERVER-33248 allows a node to choose a sync source with the same lastApplied if it has a higher lastOpCommitted. This leads to sync source cycles, as described in SERVER-39367. This is fixed on 4.2 in SERVER-39367, which reverts the change while introducing a new mechanism to propagate the majority commit point through heartbeats. However, SERVER-39367 is not safe to backport to 4.0, since it increases the likelihood of sync source cycles with nodes that have SERVER-33248. On 4.0, we will just revert SERVER-33248.

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              • Assignee:
                tess.avitabile Tess Avitabile
                Reporter:
                tess.avitabile Tess Avitabile
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                  Updated:
                  Resolved: