Details

    • Type: Sub-task Sub-task
    • Status: Closed
    • Priority: Major Major
    • Resolution: Fixed
    • Affects Version/s: 0.23.0
    • Fix Version/s: 0.23.1
    • Component/s: mr-am, mrv2, performance
    • Labels:
      None
    • Hadoop Flags:
      Reviewed
    • Target Version/s:

      Description

      MR AM creates new JobConf objects unnecessarily in a couple of places in JobImpl and TaskImpl which occupy non-trivial amount of heap.

      While working with a 64 bit JVM on 100K maps jobs, with uncompressed pointers, removing those extraneous objects helped in addressing OOM with 2GB AM heap size.

      1. MAPREDUCE-3567-20111222.txt
        26 kB
        Vinod Kumar Vavilapalli
      2. MAPREDUCE-3567-20111215.1.txt
        25 kB
        Vinod Kumar Vavilapalli

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          • Assignee:
            Vinod Kumar Vavilapalli
            Reporter:
            Vinod Kumar Vavilapalli
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            Dates

            • Created:
              Updated:
              Resolved:

              Development