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  1. Documentation
  2. DOCS-15166

Investigate changes in SERVER-63531: commitQuorum error message incorrectly says that only voting nodes are eligible

    • Type: Icon: Task Task
    • Resolution: Fixed
    • Priority: Icon: Major - P3 Major - P3
    • 6.0.0-rc0, 5.0.8, 5.3.2
    • Affects Version/s: 5.0.0, 5.3.0, 6.0.0
    • Component/s: None
    • None

      Original Downstream Change Summary

      The following changes have been made:

      • Error messages have been updated to indicate that non-voting nodes may be included in an index build commitQuourm. Our documentation incorrectly states that commitQuorum only includes "data-bearing voting replica set members". This should be updated to say "data-bearing replica set members"
      • Nodes with buildIndexes:false can never be included in a commitQuorum. Previously, we incorrectly allowed non-voting buildIndexes:false nodes to be part of a commitQuorum, but these nodes should never be included, regardless of voting status.

        Description of Linked Ticket

        The commitQuorum option for index builds does not allow non-voting nodes to participate. With the default commitQuorum of "votingMembers", a lagged non-voting secondary, like an analytics node, can fall behind. Other voting nodes will commit, but when this secondary receives a commitIndexBuild oplog entry, it stalls until the index build completes.

      There is currently no way to use commitQuorum to include the non-voting node to prevent this from happening.

      commitQuorum does allow you to include non-voting nodes, however the error message we report "Not enough data-bearing voting nodes to satisfy commit quorum" is incorrect. We should also update the documentation to reflect this.

            ashley.brown@mongodb.com Ashley Brown
            backlog-server-pm Backlog - Core Eng Program Management Team
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              2 years, 13 weeks, 3 days ago