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  1. Hadoop Common
  2. HADOOP-4683

Move the call to getMapCompletionEvents in ReduceTask.ReduceCopier.fetchOutputs to a separate thread

    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 0.20.0
    • Component/s: None
    • Labels:
      None
    • Hadoop Flags:
      Reviewed

      Description

      The method ReduceTask.ReduceCopier.fetchOutputs makes a call to getMapCompletionEvents every iteration of the loop. This should be moved out to a separate thread. This might slow down the shuffle scheduler in some cases since there is a sleep inside the getMapCompletionEvents method.

        Attachments

        1. hadoop-4683.patch
          21 kB
          Jothi Padmanabhan

          Activity

            People

            • Assignee:
              jothipn Jothi Padmanabhan
              Reporter:
              devaraj Devaraj Das
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              Dates

              • Created:
                Updated:
                Resolved: