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  1. Core Server
  2. SERVER-30058

Balancer policy should not move chunks off shards on 'size exceeded' conditions

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major - P3
    • Resolution: Fixed
    • Affects Version/s: 3.4.6, 3.5.9
    • Fix Version/s: 3.4.7, 3.5.10
    • Component/s: Sharding
    • Labels:
      None
    • Backwards Compatibility:
      Fully Compatible
    • Operating System:
      ALL
    • Backport Requested:
      v3.4
    • Sprint:
      Sharding 2017-07-31

      Description

      The inclusion of the shard size exceeded check as a pre-condition for deciding whether to move chunks off a shard is a bug, which was introduced in 3.4 as part of this commit.

      Such a policy has the potential to cause chunks to move off a shard and then back to it on subsequent rounds and should be removed.

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                  Updated:
                  Resolved: