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https://issues.apache.org/jira/browse/MAPREDUCE-4514?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13428472#comment-13428472
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Jason Lowe commented on MAPREDUCE-4514:
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This also breaks when trying to create multiple symlinks to the same file,
e.g.: {{x#a,x#b,x#c}} only creates the symlink for {{a}} instead of all three.
The problem is Container holds a map from resource Path to symlink String, but
there could be multiple symlinks to the same source Path.
> Symlinks to peer distributed cache files no longer work
> -------------------------------------------------------
>
> Key: MAPREDUCE-4514
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4514
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: distributed-cache, mrv2
> Affects Versions: 0.23.3, 2.0.1-alpha
> Reporter: Jason Lowe
> Assignee: Jason Lowe
>
> Trying to create a symlink to another file that is specified for the
> distributed cache will fail to create the link. For example:
> hadoop jar ... -files "x,y,x#z"
> will localize the files x and y as x and y, but the z symlink for x will not
> be created. This is a regression from 1.x behavior.
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