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  1. Core Server
  2. SERVER-23919

Database/Collection drop during initial sync can cause collmod to fail initial sync

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    • Backwards Compatibility:
      Fully Compatible
    • Operating System:
      ALL
    • Backport Completed:
    • Sprint:
      Repl 14 (05/13/16)
    • Linked BF Score:
      0

      Description

      If during the cloning of collections the database is dropped then it is possible that none of the collections are copied – same can happen with a collection as well. If we then apply an operation from the oplog which tries to change that collection, like collMod, it is possible for it fail and error (causing a shutdown of the server).

      We should write a test to reproduce this before we attempt a fix, to ensure it is a real problem.

      One possible solution might be that we check if the collection still exists remotely and if not, ignore the error – since the database will be dropped later in the oplog.

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