Siddharth Seth created MAPREDUCE-5221:
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Summary: Reduce side Combiner is not used when using the new API
Key: MAPREDUCE-5221
URL: https://issues.apache.org/jira/browse/MAPREDUCE-5221
Project: Hadoop Map/Reduce
Issue Type: Bug
Affects Versions: 2.0.4-alpha
Reporter: Siddharth Seth
If a combiner is specified using o.a.h.mapreduce.Job.setCombinerClass - this
will silently ignored on the reduce side since the reduce side usage is only
aware of the old api combiner.
This doesn't fail the job - since the new combiner key does not deprecate the
old key.
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