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  1. Core Server
  2. SERVER-33638

CheckReplDBHash should ignore mapreduce incremental collections

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Details

    • Bug
    • Status: Closed
    • Major - P3
    • Resolution: Fixed
    • None
    • 3.6.6, 3.7.4
    • Replication
    • None
    • Fully Compatible
    • ALL
    • v3.6
    • TIG 2018-04-09, TIG 2018-04-23
    • 16

    Description

      If a mapreduce is interrupted by a stepdown while its "_inc" collection exists, it will not be able to delete the "_inc" collection. Since that collection is not replicated (per SERVER-13981), this will result in a DBHash mismatch.

      It might be better to come up with a better way of handling those collections, such as putting them in local.tmp. As it is I wonder if initial-syncing nodes will pick up the _inc collections even though they are not in the oplog.

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              samy.lanka@mongodb.com Samyukta Lanka
              matthew.russotto@mongodb.com Matthew Russotto
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                Created:
                Updated:
                Resolved: