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https://issues.apache.org/jira/browse/HADOOP-8589?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13415601#comment-13415601
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Daryn Sharp commented on HADOOP-8589:
-------------------------------------
What I'm trying to say is if the viewfs tests are confined to build.test.dir,
then the mount path problems _and_ the trash problem are both solved. They are
only orthogonal if you believe that viewfs should mount your home dir, and
trust it to not munge the contents of you home directory, and/or your ~/.Trash
if you are on OS X. This is at least the third jira to "fix" mounting home
dirs. It always fixes for some & breaks for others.
Are there drawbacks to confining the tests to mounts within build.test.dir?
> ViewFs tests fail when tests and home dirs are nested
> -----------------------------------------------------
>
> Key: HADOOP-8589
> URL: https://issues.apache.org/jira/browse/HADOOP-8589
> Project: Hadoop Common
> Issue Type: Bug
> Components: fs, test
> Affects Versions: 0.23.1, 2.0.0-alpha
> Reporter: Andrey Klochkov
> Assignee: Andrey Klochkov
> Attachments: HADOOP-8859.patch
>
>
> TestFSMainOperationsLocalFileSystem fails in case when the test root
> directory is under the user's home directory, and the user's home dir is
> deeper than 2 levels from /. This happens with the default 1-node
> installation of Jenkins.
> This is the failure log:
> {code}
> org.apache.hadoop.fs.FileAlreadyExistsException: Path /var already exists as
> dir; cannot create link here
> at org.apache.hadoop.fs.viewfs.InodeTree.createLink(InodeTree.java:244)
> at org.apache.hadoop.fs.viewfs.InodeTree.<init>(InodeTree.java:334)
> at
> org.apache.hadoop.fs.viewfs.ViewFileSystem$1.<init>(ViewFileSystem.java:167)
> at
> org.apache.hadoop.fs.viewfs.ViewFileSystem.initialize(ViewFileSystem.java:167)
> at
> org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:2094)
> at org.apache.hadoop.fs.FileSystem.access$200(FileSystem.java:79)
> at
> org.apache.hadoop.fs.FileSystem$Cache.getInternal(FileSystem.java:2128)
> at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:2110)
> at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:290)
> at
> org.apache.hadoop.fs.viewfs.ViewFileSystemTestSetup.setupForViewFileSystem(ViewFileSystemTestSetup.java:76)
> at
> org.apache.hadoop.fs.viewfs.TestFSMainOperationsLocalFileSystem.setUp(TestFSMainOperationsLocalFileSystem.java:40)
> ...
> Standard Output
> 2012-07-11 22:07:20,239 INFO mortbay.log (Slf4jLog.java:info(67)) - Home dir
> base /var/lib
> {code}
> The reason for the failure is that the code tries to mount links for both
> "/var" and "/var/lib", and it fails for the 2nd one as the "/var" is mounted
> already.
> The fix was provided in HADOOP-8036 but later it was reverted in HADOOP-8129.
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