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https://issues.apache.org/jira/browse/MAPREDUCE-2454?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13029392#comment-13029392
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Owen O'Malley commented on MAPREDUCE-2454:
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I should also comment that the initialize method would allow the plugin to
start any additional
services that it needs.
MapOutputCollector's flush is a method that should be controlled by the sorter
and not the framework.
> Allow external sorter plugin for MR
> -----------------------------------
>
> Key: MAPREDUCE-2454
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-2454
> Project: Hadoop Map/Reduce
> Issue Type: New Feature
> Reporter: Mariappan Asokan
> Priority: Minor
> Attachments: KeyValueIterator.java, MapOutputSorter.java,
> MapOutputSorterAbstract.java, ReduceInputSorter.java
>
>
> Define interfaces and some abstract classes in the Hadoop framework to
> facilitate external sorter plugins both on the Map and Reduce sides.
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