Hadoop Map/Reduce
  1. Hadoop Map/Reduce
  2. MAPREDUCE-1700

User supplied dependencies may conflict with MapReduce system JARs

    Details

    • Type: Bug Bug
    • Status: Closed
    • Priority: Major 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.

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

        Issue Links

          Activity

          No work has yet been logged on this issue.

            People

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

              Dates

              • Created:
                Updated:
                Resolved:

                Development