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https://issues.apache.org/jira/browse/MAPREDUCE-2454?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13419262#comment-13419262
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Mariappan Asokan commented on MAPREDUCE-2454:
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Hi Arun,
I came across MAPREDUCE-1392 that mentions TestReduceFetch failures. I was
able to reproduce intermittent failures when I ran the test repeatedly on my
laptop. I may be wrong but it appears to be related to some timing issue. I
will investigate how the test can be stabilized so that it is rerunnable. If I
find anything or have a proposal to fix this issue, I will add my comments in
MAPREDUCE-1392.
> 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
> Affects Versions: 2.0.0-alpha, 3.0.0
> Reporter: Mariappan Asokan
> Priority: Minor
> Labels: features, performance, plugin, sort
> Attachments: HadoopSortPlugin.pdf, KeyValueIterator.java,
> MR-2454-trunkPatchPreview.gz, MapOutputSorter.java,
> MapOutputSorterAbstract.java, ReduceInputSorter.java, mapreduce-2454.patch,
> mr-2454-on-mr-279-build82.patch.gz
>
>
> 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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