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From "Tsuyoshi OZAWA (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MAPREDUCE-5221) Reduce side Combiner is not used when using the new API
Date Sat, 15 Mar 2014 08:56:48 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-5221?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Tsuyoshi OZAWA updated MAPREDUCE-5221:
--------------------------------------

    Attachment: MAPREDUCE-5221.8.patch

I apologize for my delay. Updated on current trunk based on [~kkambatl]'s comment.

1. TaskReporter and Reporter problem: Changed to use TaskReporter on {Map,Reduce}Task side,
and use Reporter on Shuffle Plugin side. 
2. To cast unconditionally on MergeManagerImpl, put a condition to check whether Reporeter.NULL
is passed.

> 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
>            Assignee: Tsuyoshi OZAWA
>         Attachments: MAPREDUCE-5221.1.patch, MAPREDUCE-5221.2.patch, MAPREDUCE-5221.3.patch,
MAPREDUCE-5221.4.patch, MAPREDUCE-5221.5.patch, MAPREDUCE-5221.6.patch, MAPREDUCE-5221.7-2.patch,
MAPREDUCE-5221.7.patch, MAPREDUCE-5221.8.patch
>
>
> 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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