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https://issues.apache.org/jira/browse/MAPREDUCE-5470?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13747696#comment-13747696
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Sandy Ryza commented on MAPREDUCE-5470:
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Ok that reasoning makes sense to me. Uploading a patch that reverts that part
of MAPREDUCE-5367 that touched the task dirs.
> LocalJobRunner does not work on Windows.
> ----------------------------------------
>
> Key: MAPREDUCE-5470
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-5470
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Affects Versions: 3.0.0, 2.1.1-beta
> Reporter: Chris Nauroth
> Attachments: MAPREDUCE-5470.patch
>
>
> {{LocalJobRunner#getLocalTaskDir}} creates a directory that is unique to the
> task ID. The logic of this method concatenates the local job dir and a
> task-specific path, but one of the arguments is a {{Path}} with a scheme, so
> the final result has "file:" embedded in it. This works on Linux, but the
> ':' is an invalid character in a file name on Windows.
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