Hadoop Map/Reduce
  1. Hadoop Map/Reduce
  2. MAPREDUCE-1435

symlinks in cwd of the task are not handled properly after MAPREDUCE-896

    Details

    • Type: Bug Bug
    • Status: Closed
    • Priority: Major Major
    • Resolution: Fixed
    • Affects Version/s: 0.22.0
    • Fix Version/s: 0.21.0
    • Component/s: tasktracker
    • Labels:
      None
    • Hadoop Flags:
      Reviewed
    • Release Note:
      Fixes bugs in linux task controller and TaskRunner.setupWorkDir() related to handling of symlinks.

      Description

      With JVM reuse, TaskRunner.setupWorkDir() lists the contents of workDir and does a fs.delete on each path listed. If the listed file is a symlink to directory, it will delete the contents of those linked directories. This would delete files from distributed cache and jars directory,if mapred.create.symlink is true.
      Changing ownership/permissions of symlinks through ENABLE_TASK_FOR_CLEANUP would change ownership/permissions of underlying files.

      This is observed by Karam while running streaming jobs with DistributedCache and jvm reuse.

      1. 1435.patch
        7 kB
        Ravi Gummadi
      2. 1435.v1.patch
        12 kB
        Ravi Gummadi
      3. 1435.v2.patch
        19 kB
        Ravi Gummadi
      4. MR-1435-y20s.patch
        13 kB
        Hemanth Yamijala
      5. 1435.v3.patch
        25 kB
        Hemanth Yamijala
      6. 1435.v4.patch
        27 kB
        Hemanth Yamijala
      7. MR-1435-y20s-1.txt
        21 kB
        Hemanth Yamijala

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            People

            • Assignee:
              Ravi Gummadi
              Reporter:
              Amareshwari Sriramadasu
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              Dates

              • Created:
                Updated:
                Resolved:

                Development