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  1. Hadoop Common
  2. HADOOP-3140

JobTracker should not try to promote a (map) task if it does not write to DFS at all

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Details

    • Bug
    • Status: Closed
    • Major
    • Resolution: Fixed
    • None
    • 0.17.0
    • None
    • None
    • Reviewed
    • Tasks that don't generate any output are not inserted in the commit queue of the JobTracker. They are marked as SUCCESSFUL by the TaskTracker and the JobTracker updates their state short-circuiting the commit queue.

    Description

      In most cases, map tasks do not write to dfs.
      Thus, when they complete, they should not be put into commit_pending queue at all.
      This will improve the task promotion significantly.

      Attachments

        1. HADOOP-3140-v3.patch
          9 kB
          Amar Kamat
        2. HADOOP-3140-v3.patch
          10 kB
          Amar Kamat
        3. HADOOP-3140-v2.patch
          9 kB
          Amar Kamat
        4. HADOOP-3140-v1.patch
          8 kB
          Amar Kamat

        Activity

          People

            amar_kamat Amar Kamat
            runping Runping Qi
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            Dates

              Created:
              Updated:
              Resolved: