Eli Acherkan created HADOOP-10898:
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Summary: MapWritable instances cannot be reused when containing
different custom Writable classes.
Key: HADOOP-10898
URL: https://issues.apache.org/jira/browse/HADOOP-10898
Project: Hadoop Common
Issue Type: Bug
Components: io
Reporter: Eli Acherkan
Priority: Minor
When a data stream contains several MapWritable instances, which contain
instances of several different custom classes (implementing Writable),
attempting to reuse a single MapWritable instance for reading the data stream
results in an IllegalArgumentException. This happens because
AbstractMapWritable.readFields doesn't reset the classToIdMap/idToClassMap data
structures.
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