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  1. Core Server
  2. SERVER-38906

Multi-document transactions should not perform timestamped read ahead of all-committed

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    Details

    • Type: Task
    • Status: Closed
    • Priority: Major - P3
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 4.1.9
    • Component/s: Replication
    • Labels:
    • Backwards Compatibility:
      Fully Compatible
    • Sprint:
      Repl 2019-01-28, Repl 2019-02-11, Repl 2019-02-25, Repl 2019-03-11
    • Linked BF Score:
      7

      Description

      Multi-document transactions with read concern level local or majority perform a timestamped read at the lastApplied. Since the lastApplied is ahead of the all-committed, after the work to allow WT read at a timestamp without a snapshot, this could cause these transactions to read uncommitted storage transactions. It is essential that multi-document transactions with read concern level local read at lastApplied, so that w:1 writes are visible to these transactions. As a solution, multi-document transactions reading ahead of all-committed will not perform a timestamped read.

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                • Created:
                  Updated:
                  Resolved: