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https://issues.apache.org/jira/browse/HADOOP-9761?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13727823#comment-13727823
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Colin Patrick McCabe commented on HADOOP-9761:
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OK. That is a fair point. Duplicating the exception could be a maintenance
issue.
+1
> ViewFileSystem#rename fails when using DistributedFileSystem
> ------------------------------------------------------------
>
> Key: HADOOP-9761
> URL: https://issues.apache.org/jira/browse/HADOOP-9761
> Project: Hadoop Common
> Issue Type: Bug
> Components: viewfs
> Affects Versions: 3.0.0, 2.1.0-beta
> Reporter: Andrew Wang
> Assignee: Andrew Wang
> Attachments: 0001-HADOOP-9761.004.patch, hadoop-9761-1.patch,
> hadoop-9761-1.patch, hadoop-9761-2.patch
>
>
> ViewFileSystem currently passes unqualified paths (no scheme or authority) to
> underlying FileSystems when doing a rename. DistributedFileSystem symlink
> support added in HADOOP-9418 needs to qualify and check rename sources and
> destinations since cross-filesystem renames aren't supported, so this breaks
> in the following way
> - Default FS URI is configured to viewfs://<viewfs>
> - When doing a rename, ViewFileSystem checks to make sure both src and dst
> FileSystems are the same (which they are, both in same DFS), and then calls
> DistributedFileSystem#rename with unqualified "remainder" paths
> - Since these paths are unqualified, DFS qualifies them with the default FS
> to check that it can do the rename. This turns it into
> viewfs://<viewfs>/<path>
> - Since viewfs://<viewfs> is not the DFS's URI, DFS errors out the rename.
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