[HADOOP-10898] MapWritable instances cannot be reused when containing different custom Writable classes.

• Type: Bug
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Component/s: io
• Assignee: Unassigned
• Reporter: Eli Acherkan
• Created: 29/Jul/14 09:02
• Updated: 03/Nov/16 21:49

Description

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.