Check for serializers early, and give out more information regarding missing
serializers
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Key: MAPREDUCE-2584
URL: https://issues.apache.org/jira/browse/MAPREDUCE-2584
Project: Hadoop Map/Reduce
Issue Type: Improvement
Components: task
Affects Versions: 0.20.2
Reporter: Harsh J
Assignee: Harsh J
As discussed on HADOOP-7328, MapReduce can handle serializers in a much better
way in case of bad configuration, improper imports (Some odd Text class instead
of the Writable Text set as key), etc..
This issue covers the MapReduce parts of the improvements (made to IFile,
MapOutputBuffer, etc. and possible early-check of serializer availability
pre-submit) that provide more information than just an NPE as is the current
case.
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