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  1. Hadoop Common
  2. HADOOP-1984

some reducer stuck at copy phase and progress extremely slowly

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Details

    • Bug
    • Status: Closed
    • Critical
    • Resolution: Fixed
    • 0.16.0
    • 0.16.0
    • None
    • None

    Description

      In many cases, some reducers got stuck at copy phase, progressing extremely slowly.
      The entire cluster seems doing nothing. This causes a very bad long tails of otherwise well tuned map/red jobs.

      Attachments

        1. HADOOP-1984.patch
          3 kB
          Amar Kamat
        2. HADOOP-1984-simple.patch
          7 kB
          Amar Kamat
        3. HADOOP-1984-simple.patch
          7 kB
          Amar Kamat
        4. HADOOP-1984-simple.patch
          6 kB
          Amar Kamat

        Activity

          People

            amar_kamat Amar Kamat
            runping Runping Qi
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            Dates

              Created:
              Updated:
              Resolved: