Hadoop Map/Reduce
  1. Hadoop Map/Reduce
  2. MAPREDUCE-5079

Recovery should restore task state from job history info directly

    Details

    • Type: Improvement Improvement
    • Status: Closed
    • Priority: Critical Critical
    • Resolution: Fixed
    • Affects Version/s: 0.23.7
    • Fix Version/s: 0.23.7, 2.1.0-beta
    • Component/s: mr-am
    • Labels:
      None

      Description

      We've encountered a lot of hanging issues during MR-AM recovery because the state machines don't always end up in the same states after recovery. This is especially true when speculative execution is enabled. It should be straightforward to restore task and task attempt states directly from the TaskInfo and TaskAttemptInfo records in the job history file to avoid relying on the task state machines ending up in the proper states with the proper number of attempts.

      This should be a more robust solution that would also give us the option of recovering start time and log locations for tasks that were in-progress when the AM crashed.

      1. MAPREDUCE-5079.patch
        102 kB
        Jason Lowe
      2. MAPREDUCE-5079.patch
        126 kB
        Jason Lowe
      3. MAPREDUCE-5079.patch
        127 kB
        Jason Lowe
      4. MAPREDUCE-5079-branch-0.23.patch
        125 kB
        Jason Lowe
      5. MAPREDUCE-5079.patch
        129 kB
        Jason Lowe
      6. MAPREDUCE-5079-branch-0.23.patch
        128 kB
        Jason Lowe

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            • Assignee:
              Jason Lowe
              Reporter:
              Jason Lowe
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              Dates

              • Created:
                Updated:
                Resolved:

                Development