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  1. Core Server
  2. SERVER-36966

Sharded map reduce may fail to clean up temporary output collection

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    • Fully Compatible
    • ALL
    • v4.0, v3.6
    • 14

    Description

      This call is supposed to drop the temporary output collections if anything goes wrong in the command, but in some cases we don't reach there. In particular, I've reproduced a failure where this line can throw an exception due to a stale config. When that happens, the cleanup code doesn't run and the collection is left around.

      To fix this, we should use a ScopeGuard to make sure we clean up the temporary collections if we exit the function due to an exception.

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              charlie.swanson@mongodb.com Charlie Swanson
              charlie.swanson@mongodb.com Charlie Swanson
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