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  1. ZooKeeper
  2. ZOOKEEPER-1879

improve the correctness checking of txn log replay

    Details

    • Type: Improvement
    • Status: Open
    • Priority: Major
    • Resolution: Unresolved
    • Affects Version/s: 3.4.6, 3.5.0
    • Fix Version/s: 3.5.4, 3.6.0
    • Component/s: server
    • Labels:
      None

      Description

      In ZOOKEEPER-1573 we decided to fix an issue by relaxing some of the checking. Specifically when the sequence of txns is as follows:

      • zxid 1: create /prefix/a
      • zxid 2: create /prefix/a/b
      • zxid 3: delete /prefix/a/b
      • zxid 4: delete /prefix/a

      the log may fail to replay.

      We addressed this by relaxing a check, which is essentially invalid for this case, but is important in finding corruptions of the datastore.

      We should add this check back with proper validation of correctness.

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              • Assignee:
                Unassigned
                Reporter:
                phunt Patrick Hunt
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                Dates

                • Created:
                  Updated: