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  1. Hadoop Map/Reduce
  2. MAPREDUCE-2846

a small % of all tasks fail with DefaultTaskController

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    Details

    • Hadoop Flags:
      Reviewed
    • Release Note:
      Fixed a race condition in writing the log index file that caused tasks to 'fail'.

      Description

      After upgrading our test 0.20.203 grid to 0.20.204-rc2, we ran terasort to verify operation. While the job completed successfully, approx 10% of the tasks failed with task runner execution errors and the inability to create symlinks for attempt logs.

        Attachments

        1. sync.patch
          0.9 kB
          Owen O'Malley
        2. sync-trunk.patch
          1 kB
          Owen O'Malley

          Issue Links

          is related to

          Bug - A problem which impairs or prevents the functions of the product. MAPREDUCE-2804 "Creation of symlink to attempt log dir failed." message is not useful

          • Blocker - Blocks development and/or testing work, production could not run
          • Closed
          relates to

          Sub-task - The sub-task of the issue MAPREDUCE-2415 Distribute TaskTracker userlogs onto multiple disks

          • Major - Major loss of function.
          • Closed

            Activity

              People

              • Assignee:
                omalley Owen O'Malley
                Reporter:
                aw Allen Wittenauer
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                Dates

                • Created:
                  Updated:
                  Resolved: