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  1. Core Server
  2. SERVER-9909

Balancer round aborted with idle sharded collection

    • Type: Icon: Bug Bug
    • Resolution: Done
    • Priority: Icon: Major - P3 Major - P3
    • 2.4.5, 2.5.1
    • Affects Version/s: 2.5.0
    • Component/s: Sharding
    • None
    • ALL

      In order to guarantee fair balancing, the balancer tries to move one-chunk-per-collection-per-round. However, if when the balancer tries to load information on a newly-sharded collection it doesn't know about, an exception is thrown that aborts the round (Balancer::_moveChunks() calls getChunkManager(), which throws).

      Solution is to use getChunkManagerIfExists(), which does not throw, and pass in reload=true to make the Balancer load the ChunkManager even if the collection is idle.

            Assignee:
            greg_10gen Greg Studer
            Reporter:
            greg_10gen Greg Studer
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              Created:
              Updated:
              Resolved: