Uploaded image for project: 'Hadoop Map/Reduce'
  1. Hadoop Map/Reduce
  2. MAPREDUCE-1700

User supplied dependencies may conflict with MapReduce system JARs

    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 2.0.3-alpha
    • Component/s: task
    • Labels:
      None
    • Hadoop Flags:
      Reviewed

      Description

      If user code has a dependency on a version of a JAR that is different to the one that happens to be used by Hadoop, then it may not work correctly. This happened with user code using a different version of Avro, as reported here.

      The problem is analogous to the one that application servers have with WAR loading. Using a specialized classloader in the Child JVM is probably the way to solve this.

        Attachments

        1. MAPREDUCE-1700.patch
          16 kB
          Tom White
        2. MAPREDUCE-1700.patch
          27 kB
          Tom White
        3. MAPREDUCE-1700.patch
          26 kB
          Tom White
        4. MAPREDUCE-1700.patch
          25 kB
          Tom White
        5. MAPREDUCE-1700.patch
          24 kB
          Tom White
        6. MAPREDUCE-1700.patch
          29 kB
          Tom White
        7. MAPREDUCE-1700-ccl.patch
          29 kB
          Tom White
        8. MAPREDUCE-1700-ccl.patch
          17 kB
          Tom White
        9. MAPREDUCE-1700.patch
          38 kB
          Tom White
        10. MAPREDUCE-1700.patch
          42 kB
          Tom White

          Issue Links

            Activity

              People

              • Assignee:
                tomwhite Tom White
                Reporter:
                tomwhite Tom White
              • Votes:
                11 Vote for this issue
                Watchers:
                39 Start watching this issue

                Dates

                • Created:
                  Updated:
                  Resolved: