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From "Jim Kellerman (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-1775) MapWritable and SortedMapWritable - Writable problems
Date Fri, 24 Aug 2007 00:32:30 GMT
MapWritable and SortedMapWritable - Writable problems

                 Key: HADOOP-1775
                 URL: https://issues.apache.org/jira/browse/HADOOP-1775
             Project: Hadoop
          Issue Type: Bug
          Components: io
    Affects Versions: 0.15.0
            Reporter: Jim Kellerman
            Assignee: Jim Kellerman
             Fix For: 0.15.0

When using the Writable interface for MapWritable and SortedMapWritable there are two errors:
- in readFields, if there are a number of entries of a class that is not one of the "predefined"
classes, the following exception is thrown:
java.lang.IllegalArgumentException: Class <not predefined class name> already registered
- readFields did not set the number of non-predefined classes. Consequently, making a copy
of a copy that had entries of non-predefined  classes would fail because the second copy would
not receive the mapping from id to class.

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