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  1. Core Server
  2. SERVER-36240

Make transactions on mongos use snapshot level readConcern if no level was provided

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    • Fully Compatible
    • Sharding 2018-07-30, Sharding 2018-08-13

    Description

      If the first statement in a transaction does not specify snapshot readConcern, mongod will implicitly upconvert it to snapshot. Mongos currently does not have this behavior, and because many core/txns tests rely on this, either mongos will need to upconvert readConcerns to snapshot as well (until we support transactions with other readConcern levels) or the tests need to be updated to explicitly choose snapshot readConcern.

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          is documented by

          Task - A task that needs to be done. DOCS-11944 Docs for SERVER-36240: Make transactions on mongos use snapshot level readConcern if no level was provided

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

          Bug - A problem which impairs or prevents the functions of the product. SERVER-35709 mongos should remember readConcern setting for multi statement transaction

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

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              jack.mulrow@mongodb.com Jack Mulrow
              jack.mulrow@mongodb.com Jack Mulrow
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