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https://issues.apache.org/jira/browse/MAPREDUCE-4549?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13614367#comment-13614367
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Roman Shaposhnik commented on MAPREDUCE-4549:
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All the findings are attached over here: MAPREDUCE-4820
At this point I'd agree with Arun and close this one. We can track what's left
over at MAPREDUCE-4820
> Distributed cache conflicts breaks backwards compatability
> ----------------------------------------------------------
>
> Key: MAPREDUCE-4549
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4549
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: mrv2
> Affects Versions: 0.23.3, 2.0.2-alpha
> Reporter: Robert Joseph Evans
> Assignee: Robert Joseph Evans
> Priority: Blocker
> Fix For: 0.23.5, 2.0.4-alpha
>
> Attachments: MAPREDUCE-4549-trunk.patch, MR-4549-branch-0.23.txt
>
>
> I recently put in MAPREDUCE-4503 which went a bit too far, and broke
> backwards compatibility with 1.0 in distribtued cache entries. instead of
> changing the behavior of the distributed cache to more closely match 1.0
> behavior I want to just change the exception to a warning message informing
> the users that it will become an error in 2.0
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