Drivers should use majority write concern when retrying commitTransaction

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    • Type: Improvement
    • Resolution: Fixed
    • Priority: Major - P3
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    • Component/s: None
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      Relevant changes were added to the commitTransaction section:

      When commitTransaction is retried, either by the driver's internal retry-once logic or explicitly by the user calling commitTransaction again, drivers MUST apply w: majority to the write concern of the commitTransaction command. If the transaction is using a writeConcern that is not the server default (i.e. specified via TransactionOptions during the startTransaction call or otherwise inherited), any other write concern options (e.g. wtimeout) MUST be left as-is when applying w: majority. Finally, if the modified write concern does not include a wtimeout value, drivers MUST also apply wtimeout: 10000 to the write concern in order to avoid waiting forever (or until a socket timeout) if the majority write concern cannot be satisfied. See Majority write concern is used when retrying commitTransaction.

      Note: The transaction spec tests have also been updated. Please ensure your driver is synced to https://github.com/mongodb/specifications/commit/ba1b071fa8b63454fb421bec824c454c92fc5e83 (or newer).

            Assignee:
            Unassigned
            Reporter:
            Jeremy Mikola
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