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https://issues.apache.org/jira/browse/HADOOP-9912?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13760476#comment-13760476
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Colin Patrick McCabe commented on HADOOP-9912:
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HDFS symlinks support in FileContext has been in many official releases of
Hadoop 2. "I doubt they're being used" is not really a good reason to break
the existing behavior. That's why we have been trying to keep as close as
possible to the FileContext behavior in our port of symlinks to FileSystem.
As Andrew mentioned, it is not always possible to resolve symlinks. There can
be infinite symlink loops, or dangling symlinks. "Just make them go away, I
don't want to see them at all" is not a viable strategy. Symlinks exist and
their semantics are different than directories or files.
There may be an occasional program that needs a tiny change to be compatible
with symlinks. I think this is likely to be extremely rare, since
getFileStatus resolves symlinks fully, and symlinks are mostly transparent to
the application. If system administrators don't want to change anything, they
don't have to-- they can just continue not using symlinks on their clusters.
> globStatus of a symlink to a directory does not report symlink as a directory
> -----------------------------------------------------------------------------
>
> Key: HADOOP-9912
> URL: https://issues.apache.org/jira/browse/HADOOP-9912
> Project: Hadoop Common
> Issue Type: Bug
> Components: fs
> Affects Versions: 2.3.0
> Reporter: Jason Lowe
> Priority: Blocker
> Attachments: HADOOP-9912-testcase.patch, new-hdfs.txt, new-local.txt,
> old-hdfs.txt, old-local.txt
>
>
> globStatus for a path that is a symlink to a directory used to report the
> resulting FileStatus as a directory but recently this has changed.
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