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Posted to mapreduce-dev@hadoop.apache.org by "Siddharth Seth (JIRA)" <ji...@apache.org> on 2013/05/08 00:59:16 UTC

[jira] [Created] (MAPREDUCE-5221) Reduce side Combiner is not used when using the new API

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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