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https://issues.apache.org/jira/browse/MAPREDUCE-5294?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tsuyoshi OZAWA reopened MAPREDUCE-5294:
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Sorry, I resolved this jira wrongly, so reopen it.
> Shuffle#MergeManager should support org.apache.hadoop.mapreduce.Reducer
> -----------------------------------------------------------------------
>
> Key: MAPREDUCE-5294
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-5294
> Project: Hadoop Map/Reduce
> Issue Type: Sub-task
> Components: mrv2
> Affects Versions: trunk, 2.1.0-beta, 2.0.5-alpha
> Reporter: Tsuyoshi OZAWA
> Assignee: Tsuyoshi OZAWA
>
> Shuffle#MergeManager only accepts org.apache.hadoop.mapred.Reducer currently.
> Because of this, Reduce-side Combiner is not used when using the new API, and
> just ignored. By supporting it and using the feature from ReduceTask,
> Reduce-side combiner can be enabled with new API. Please see MAPREDUCE-5221
> for more detail.
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