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https://issues.apache.org/jira/browse/MAPREDUCE-6194?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14246438#comment-14246438
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Varun Saxena commented on MAPREDUCE-6194:
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[~qwertymaniac], kindly review
> Bubble up final exception in failures during creation of output collectors
> --------------------------------------------------------------------------
>
> Key: MAPREDUCE-6194
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-6194
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: task
> Affects Versions: 2.6.0
> Reporter: Harsh J
> Assignee: Varun Saxena
> Priority: Minor
> Labels: newbie
> Fix For: 2.7.0
>
> Attachments: MAPREDUCE-6194.patch
>
>
> MAPREDUCE-5974 added in ability to instantiate multiple OCs, but if none of
> them are able to load it "throws" only a final a generic message: {{"Unable
> to initialize any output collector"}}
> The older behaviour was to throw the actual instantiation exception back, so
> it makes it to client logs with an actual meaningful error.
> Now the clients need to go take a look at the task's logs to find the WARNs
> that represent the failure in instantiation.
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