Uploaded image for project: 'Hadoop Common'
  1. Hadoop Common
  2. HADOOP-4041

IsolationRunner does not work as documented

    XMLWordPrintableJSON

Details

    • Bug
    • Status: Closed
    • Major
    • Resolution: Fixed
    • 0.18.0
    • 0.21.0
    • documentation
    • None
    • Reviewed
    • Fixed a bug in IsolationRunner to make it work for map tasks.

    Description

      IsolationRunner does not work as documented in the tutorial.

      The tutorial says "To use the IsolationRunner, first set keep.failed.tasks.files to true (also see keep.tasks.files.pattern)."

      Should be:
      keep.failed.task.files (not tasks)

      After the above was set (quoted from my message on hadoop-core):
      > After the task
      > hung, I failed it via the web interface. Then I went to the node that was
      > running this task
      >
      > $ cd ...local/taskTracker/jobcache/job_200808071645_0001/work
      > (this path is already different from the tutorial's)
      >
      > $ hadoop org.apache.hadoop.mapred.IsolationRunner ../job.xml
      > Exception in thread "main" java.lang.NullPointerException
      > at
      > org.apache.hadoop.mapred.IsolationRunner.main(IsolationRunner.java:164)
      >
      > Looking at IsolationRunner code, I see this:
      >
      > 164 File workDirName = new File(lDirAlloc.getLocalPathToRead(
      > 165 TaskTracker.getJobCacheSubdir()
      > 166 + Path.SEPARATOR + taskId.getJobID()
      > 167 + Path.SEPARATOR + taskId
      > 168 + Path.SEPARATOR + "work",
      > 169 conf). toString());
      >
      > I.e. it assumes there is supposed to be a taskID subdirectory under the job
      > dir, but:
      > $ pwd
      > ...mapred/local/taskTracker/jobcache/job_200808071645_0001
      > $ ls
      > jars job.xml work
      >
      > – it's not there.

      Attachments

        1. org.apache.hadoop.fs.LocalDirAllocator.html
          6 kB
          Philip Martin
        2. HADOOP-4041-v4-y20.patch
          39 kB
          Hemanth Yamijala
        3. HADOOP-4041-v4.patch
          39 kB
          Philip Martin
        4. HADOOP-4041-v3.patch
          38 kB
          Philip Martin
        5. HADOOP-4041-v2.patch
          39 kB
          Philip Martin
        6. hadoop-4041.patch
          10 kB
          Thomas White

        Issue Links

          Activity

            People

              philip Philip Martin
              yurip Yuri Pradkin
              Votes:
              0 Vote for this issue
              Watchers:
              6 Start watching this issue

              Dates

                Created:
                Updated:
                Resolved: