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  1. Apache S4
  2. S4-44

optional backoff upon multiple consecutive failed checkpoint fetches

    Details

    • Type: Improvement
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 0.4, 0.5.0
    • Fix Version/s: 0.5.0
    • Labels:
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      Description

      if a checkpointing backend system becomes unresponsive (e.g. stalled NFS), and that a series of recoveries is to proceed (for instance, startup or failover), then each checkpoint fetching operation will block, wait for a timeout or another kind of exception, and the system will then continue without recovering this PE.

      We should provide a way to detect this pattern (multiple backend fetches failures in a short amount of time) and temporarily disable fetching from the backend, in order to reduce blocking when backend becomes unresponsive.

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              • Assignee:
                mmorel Matthieu Morel
                Reporter:
                mmorel Matthieu Morel
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                  Updated:
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