Hadoop Map/Reduce
  1. Hadoop Map/Reduce
  2. MAPREDUCE-4425

Speculation + Fetch failures can lead to a hung job

    Details

    • Type: Bug Bug
    • Status: Closed
    • Priority: Critical Critical
    • Resolution: Fixed
    • Affects Version/s: 0.23.1
    • Fix Version/s: 2.0.3-alpha, 0.23.5
    • Component/s: mrv2
    • Labels:
      None

      Description

      After a task goes to SUCCEEDED, FAILED/KILLED attempts are ignored.
      1. attemp1 starts
      2. speculative attempt starts
      3. attempt 1 completes - Task moves to SUCCEEDED state
      4. speculative attempt is KILLED
      5. T_ATTEMPT_KILLED is ignored.
      6. attemp1 1 fails with TOO_MANY_FETCH_FAILURES
      The job will effectively hang, since a new task attempt isn't started.

      1. MAPREDUCE-4425.patch
        6 kB
        Jason Lowe
      2. MAPREDUCE-4425.patch
        6 kB
        Jason Lowe
      3. MAPREDUCE-4425-branch23.patch
        6 kB
        Jason Lowe

        Activity

        No work has yet been logged on this issue.

          People

          • Assignee:
            Jason Lowe
            Reporter:
            Siddharth Seth
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            Watchers:
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            Dates

            • Created:
              Updated:
              Resolved:

              Development