Uploaded image for project: 'Core Server'
  1. Core Server
  2. SERVER-25561

Backwards compatibility issues when sending linearizable reads to multiversion sharding cluster

    XMLWordPrintable

    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major - P3
    • Resolution: Works as Designed
    • Affects Version/s: None
    • Fix Version/s: None
    • Component/s: Replication, Sharding
    • Labels:
      None

      Description

      If a linearizable read in a sharded cluster targets multiple shards (we do not disallow this even though linearizability cannot be guaranteed on more than 1 document), one of which is a replica set updated to 3.4 and another is only on version 3.2, the linearizable read command might succeed on the 3.4 set and return linearizable read not supported on the 3.2 set. We need to make sure mongos knows how to respond to this situation.

        Attachments

          Issue Links

            Activity

              People

              • Votes:
                0 Vote for this issue
                Watchers:
                4 Start watching this issue

                Dates

                • Created:
                  Updated:
                  Resolved: