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  1. Hadoop Common
  2. HADOOP-313

A stand alone driver for individual tasks

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Details

    • Bug
    • Status: Closed
    • Major
    • Resolution: Fixed
    • None
    • 0.5.0
    • None
    • None

    Description

      This is a tool to reproduce problems and to run unit tests involving either a map or reduce task.
      You just give it a reduce directory on the command line.

      Usage: java org.apache.hadoop.mapred.StandaloneReduceTask <taskdir> [<limitmaps>]
      taskdir name encodes: task_<jobid>r<partition>_<attempt>
      taskdir contains job.xml and one or more input files named: map_<dddd>.out
      You should run with the same -Xmx option as the TaskTracker child JVM

      Attachments

        1. sareduce.patch
          10 kB
          Michel Tourn
        2. stand-alone-task.patch
          11 kB
          Owen O'Malley
        3. stand-alone-task.patch
          18 kB
          Owen O'Malley

        Issue Links

          is related to

          New Feature - A new feature of the product, which has yet to be developed. MAPREDUCE-443 snapshot a map-reduce to DFS ... and restore

          • Minor - Minor loss of function, or other problem where easy workaround is present.
          • Resolved

          Activity

            People

              michel_tourn Michel Tourn
              michel_tourn Michel Tourn
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              Dates

                Created:
                Updated:
                Resolved: