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  1. Core Server
  2. SERVER-6961

v2.2 mongodump is incompatible with pre-v2.2 mongorestore

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: Minor - P4
    • Resolution: Fixed
    • Affects Version/s: 2.2.0
    • Fix Version/s: 2.3.1
    • Component/s: Tools
    • Labels:
      None
    • Backwards Compatibility:
      Fully Compatible
    • Operating System:
      ALL

      Description

      mongodump's file layout is different in v2.2 than in v2.0 in a way that will lead to undesirable results if somebody happens to run a v2.0 mongorestore on a v2.2 mongodump layout. In particular, the new mongodump doesn't produce a system.indexes.bson for each database, and old mongorestore doesn't know what to do with the <collection>.metadata.json, so restoring with an old mongorestore will not retain indexes that existed in the dumped database.

      If we want to call this a regression, then a fix would be to have mongodump additionally create the system.indexes.bson file.

      Alternatively we could call this a documentation bug and update the release notes.

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                • Created:
                  Updated:
                  Resolved: