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https://issues.apache.org/jira/browse/MAPREDUCE-1641?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12876629#action_12876629
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Amareshwari Sriramadasu commented on MAPREDUCE-1641:
----------------------------------------------------
latest patch looks fine.
> Job submission should fail if same uri is added for mapred.cache.files and
> mapred.cache.archives
> ------------------------------------------------------------------------------------------------
>
> Key: MAPREDUCE-1641
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-1641
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: distributed-cache
> Reporter: Amareshwari Sriramadasu
> Assignee: Dick King
> Fix For: 0.22.0
>
> Attachments: BZ-3539321--off-0-20-101--2010-04-20.patch,
> duped-files-archives--off-0-20-101--2010-04-21.patch,
> duped-files-archives--off-0-20-101--2010-04-23--1819.patch,
> mapreduce-1641--2010-04-27.patch, mapreduce-1641--2010-05-19.patch,
> mapreduce-1641--2010-05-21.patch, patch-1641-ydist-bugfix.txt
>
>
> The behavior of mapred.cache.files and mapred.cache.archives is different
> during localization in the following way:
> If a jar file is added to mapred.cache.files, it will be localized under
> TaskTracker under a unique path.
> If a jar file is added to mapred.cache.archives, it will be localized under a
> unique path in a directory named the jar file name, and will be unarchived
> under the same directory.
> If same jar file is passed for both the configurations, the behavior
> undefined. Thus the job submission should fail.
> Currently, since distributed cache processes files before archives, the jar
> file will be just localized and not unarchived.
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