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From "Vinod Kumar Vavilapalli (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-6332) Add more required API's to MergeManager interface
Date Mon, 27 Apr 2015 23:45:39 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-6332?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14515860#comment-14515860
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Vinod Kumar Vavilapalli commented on MAPREDUCE-6332:
----------------------------------------------------

Regarding the patch
 - MergeThread.java directly uses the merge-manager impl, that should be fixed too?
 - Add some javadoc to the new methods?

> Add more required API's to MergeManager interface 
> --------------------------------------------------
>
>                 Key: MAPREDUCE-6332
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6332
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>    Affects Versions: 2.5.0, 2.6.0, 2.7.0
>            Reporter: Rohith
>            Assignee: Rohith
>         Attachments: 0001-MAPREDUCE-6332.patch
>
>
> MR provides ability to the user for plugin custom ShuffleConsumerPlugin using *mapreduce.job.reduce.shuffle.consumer.plugin.class*.
 When the user is allowed to use this configuration as plugin, user also interest in implementing
his own MergeManagerImpl. 
> But now , user is forced to use MR provided MergeManagerImpl instead of custom MergeManagerImpl
when user is using shuffle.consumer.plugin class. There should be well defined API's in MergeManager
that can be used for any implementation without much effort to user for custom implementation.



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