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  1. Jackrabbit Oak
  2. OAK-2682

Introduce time difference detection for DocumentNodeStore

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Details

    • Improvement
    • Status: Closed
    • Major
    • Resolution: Fixed
    • None
    • 1.3.4, 1.4
    • core, mongomk, rdbmk

    Description

      Currently the lease mechanism in DocumentNodeStore/mongoMk is based on the assumption that the clocks are in perfect sync between all nodes of the cluster. The lease is valid for 60sec with a timeout of 30sec. If clocks are off by too much, and background operations happen to take couple seconds, you run the risk of timing out a lease. So introducing a check which WARNs if the clocks in a cluster are off by too much (1st threshold, eg 5sec?) would help increase awareness. Further drastic measure could be to prevent a startup of Oak at all if the difference is for example higher than a 2nd threshold (optional I guess, but could be 20sec?).

      Attachments

        1. rdbservertime.diff
          5 kB
          Julian Reschke
        2. OAK-2682.patch
          12 kB
          Stefan Egli

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              stefanegli Stefan Egli
              stefanegli Stefan Egli
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              Dates

                Created:
                Updated:
                Resolved: