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https://issues.apache.org/jira/browse/HADOOP-9984?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13785319#comment-13785319
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Chris Nauroth commented on HADOOP-9984:
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Another one is {{NativeAzureFileSystem}}. This has been contributed in
HADOOP-9629, but not reviewed and committed, so for now it lives out-of-tree.
Conceptually, it's most similar to the Swift implementation (adapter over a
blobstore, and no symlink support). It's trivial to fix it after this patch,
though perhaps a bit confusing that a {{FileSystem}} with no symlink support
must implement methods with "link" in the name.
Another potential impact is subclasses that are implementation details or
testing infrastructure inside Hadoop ecosystem projects. (In fact, this was my
primary concern when I was talking about "downstream projects".) An example is
Hive's {{ProxyFileSystem}}. That one extends {{FilterFileSystem}}, so it's
going to be fine, but if something similar extends {{FileSystem}}, then it will
break. A full recompile of the whole ecosystem would tell us for sure.
> FileSystem#globStatus and FileSystem#listStatus should resolve symlinks by
> default
> ----------------------------------------------------------------------------------
>
> Key: HADOOP-9984
> URL: https://issues.apache.org/jira/browse/HADOOP-9984
> Project: Hadoop Common
> Issue Type: Bug
> Components: fs
> Affects Versions: 2.1.0-beta
> Reporter: Colin Patrick McCabe
> Assignee: Colin Patrick McCabe
> Priority: Blocker
> Attachments: HADOOP-9984.001.patch, HADOOP-9984.003.patch,
> HADOOP-9984.005.patch, HADOOP-9984.007.patch, HADOOP-9984.009.patch,
> HADOOP-9984.010.patch, HADOOP-9984.011.patch, HADOOP-9984.012.patch,
> HADOOP-9984.013.patch, HADOOP-9984.014.patch
>
>
> During the process of adding symlink support to FileSystem, we realized that
> many existing HDFS clients would be broken by listStatus and globStatus
> returning symlinks. One example is applications that assume that
> !FileStatus#isFile implies that the inode is a directory. As we discussed in
> HADOOP-9972 and HADOOP-9912, we should default these APIs to returning
> resolved paths.
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