MultipleOutputs should not require the use of 'Writable'
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Key: MAPREDUCE-2225
URL: https://issues.apache.org/jira/browse/MAPREDUCE-2225
Project: Hadoop Map/Reduce
Issue Type: Improvement
Components: job submission
Affects Versions: 0.20.1
Reporter: Harsh J Chouraria
Assignee: Harsh J Chouraria
Fix For: 0.23.0
MultipleOutputs right now requires for Key/Value classes to utilize the
Writable and WritableComparable interfaces, and fails if the associated
key/value classes aren't doing so.
With support for alternates like Avro serialization, using Writables isn't
necessary and thus the MO class must not strictly check for them.
And since comparators may be given separately, key class doesn't need to be
checked for implementing a comparable (although it is good design if the key
class does implement Comparable at least).
Am not sure if this brings about an incompatible change (does Java have BIC? No
idea).
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