Details

    • Type: Bug Bug
    • Status: Patch Available
    • Priority: Minor Minor
    • Resolution: Unresolved
    • Affects Version/s: 0.20.1, 0.21.0
    • Fix Version/s: 0.20.1
    • Component/s: io
    • Labels:
      None
    • Environment:

      Hadoop 0.20.1, Centos

    • Release Note:
      Found a NullPointerException with MapWritable. The root cause is the counter newClasses in AbstractMapWritable is allowed to get out of sync with the id to class mapping tables when addToMap(Class) is called.

      Description

      We have encountered a NullPointerException when we use MapWritable with custom Writable objects.

      The root cause is the counter newClasses in AbstractMapWritable is allowed to get out of sync with the id to class mapping tables when addToMap(Class) is called. We have a patch to AbstractMapWritable.addToMap(Class) that handles the case when newClasses gets out of sync with the id to class mapping tables and adds a serialization optimization to minimize the number of class names to write out per MapWritable object.

      1. HADOOP-7021.patch
        3 kB
        John Lee
      2. HADOOP-7021.patch
        3 kB
        John Lee
      3. HADOOP-7021.patch
        3 kB
        John Lee
      4. HADOOP-7021.patch
        3 kB
        tom pierce

        Activity

          People

          • Assignee:
            John Lee
            Reporter:
            John Lee
          • Votes:
            1 Vote for this issue
            Watchers:
            6 Start watching this issue

            Dates

            • Created:
              Updated:

              Development