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  1. Core Server
  2. SERVER-30724

Initial sync might miss ops that were in flight when it started

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Details

    • Bug
    • Status: Closed
    • Major - P3
    • Resolution: Fixed
    • 3.0.15, 3.2.16
    • 3.2.21
    • Replication, Storage
    • None
    • Fully Compatible
    • ALL
    • Storage 2017-09-11

    Description

      When initial sync starts, the node reads the last oplog entry "A" from its sync source and uses that as its starting point when it applies operations in a later phase. Because such a read is not subject to oplog visibility rules (because it uses a reverse scanning cursor instead of a forward cursor), there could be uncommitted operations prior to "A" that affect documents after initial sync has already passed such documents by in its collection scan phase. Such changes would never be applied to the initial-syncing node.

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        Issue Links

          causes

          Bug - A problem which impairs or prevents the functions of the product. SERVER-38425 Oplog Visibility Query is a collection scan in 3.2.21

          • Major - P3 - Major loss of function.
          • Closed
          is related to

          Bug - A problem which impairs or prevents the functions of the product. SERVER-30927 Use readConcern afterClusterTime for initsync oplog queries

          • Major - P3 - Major loss of function.
          • Closed
          related to

          Bug - A problem which impairs or prevents the functions of the product. SERVER-37408 Add afterClusterTime to initial sync collection scans

          • Major - P3 - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. SERVER-37468 Problem with initial sync when adding an member in a rs in 3.2.21

          • Major - P3 - Major loss of function.
          • Closed

          Activity

            People

              judah.schvimer@mongodb.com Judah Schvimer
              milkie@mongodb.com Eric Milkie
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              Dates

                Created:
                Updated:
                Resolved: