Andrew Wang created HADOOP-9761:
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Summary: 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
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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