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  1. Hadoop Common
  2. HADOOP-3130

Shuffling takes too long to get the last map output.

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Details

    • Bug
    • Status: Closed
    • Major
    • Resolution: Fixed
    • None
    • 0.18.0
    • None
    • None
    • Reviewed

    Description

      I noticed that towards the end of shufflling, the map output fetcher of the reducer backs off too aggressively.
      I attach a fraction of one reduce log of my job.
      Noticed that the last map output was not fetched in 2 minutes.

      Attachments

        1. shuffling.log
          53 kB
          Runping Qi
        2. HADOOP-3130.patch
          0.8 kB
          Amar Kamat
        3. HADOOP-3130-v2.patch
          3 kB
          Amar Kamat
        4. HADOOP-3130-v2.patch
          3 kB
          Amar Kamat
        5. HADOOP-3130-v3.patch
          6 kB
          Amar Kamat
        6. HADOOP-3130-v3.1.patch
          6 kB
          Amar Kamat
        7. HADOOP-3130-v3.2.patch
          6 kB
          Amar Kamat

        Activity

          People

            amar_kamat Amar Kamat
            runping Runping Qi
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            Dates

              Created:
              Updated:
              Resolved: