Uploaded image for project: 'Hadoop Common'
  1. Hadoop Common
  2. HADOOP-5572

The map progress value should have a separate phase for doing the final sort.

    XMLWordPrintableJSON

Details

    • Improvement
    • Status: Closed
    • Major
    • Resolution: Fixed
    • None
    • 0.21.0
    • None
    • None
    • Reviewed

    Description

      Currently, the final spill and sort doesn't record any progress while it runs, leading to the perception that the map is done, but "stuck".

      This patch reserves 33.3% of map task's progress to sort by dividing map task in to 2 phases. Also makes the progress of sort phase(merges) work, both in map side and reduce side.

      Attachments

        1. HADOOP-5572.patch
          33 kB
          Ravi Gummadi
        2. HADOOP-5572.v1.patch
          35 kB
          Ravi Gummadi
        3. HADOOP-5572.v1.1.patch
          36 kB
          Ravi Gummadi
        4. HADOOP-5572.v1.2.patch
          38 kB
          Ravi Gummadi
        5. HADOOP-5572.v1.3.patch
          39 kB
          Ravi Gummadi
        6. HADOOP-5572.v1.4.patch
          41 kB
          Ravi Gummadi

        Issue Links

          relates to

          Bug - A problem which impairs or prevents the functions of the product. MAPREDUCE-2264 Job status exceeds 100% in some cases

          • Major - Major loss of function.
          • Closed

          Activity

            People

              ravidotg Ravi Gummadi
              omalley Owen O'Malley
              Votes:
              0 Vote for this issue
              Watchers:
              8 Start watching this issue

              Dates

                Created:
                Updated:
                Resolved: