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  1. Core Server
  2. SERVER-22498

Fix migration session id multiversion failure

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major - P3
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 3.2.3, 3.3.2
    • Component/s: Sharding
    • Labels:
    • Backwards Compatibility:
      Fully Compatible
    • Operating System:
      ALL
    • Backport Completed:
    • Sprint:
      Sharding 10 (02/19/16)

      Description

      Migration fails from 3.2 mongod to 3.0 mongod.

      In a migration, a 3.2 donor mongod generates a migration session id, saves it, and then sends it to a 3.0 recipient mongod, which ignores it. The 3.0 recipient then sends requests to the 3.2 donor without a session id. The 3.2 donor rejects the empty session id requests because it doesn't match the id it generated...

      If the 3.2 donor receives a request without a session id, ignore the match results.

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                  Updated:
                  Resolved: