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From: "Sanjay Radia (JIRA)" <jira@apache.org>
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Subject: [jira] [Commented] (HADOOP-8589) ViewFs tests fail when tests and
 home dirs are nested
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    [ https://issues.apache.org/jira/browse/HADOOP-8589?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13475333#comment-13475333 ] 

Sanjay Radia commented on HADOOP-8589:
--------------------------------------

{quote}
This is indeed still a problem on trunk:
/home/foo/bar
...
/home/harsh
..
/foo
..
{quote}
Harsh what did you mean in your comment above - did you run the tests with  the home directory or wd set to the above 3 paths?
                
> 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-8589.patch, HADOOP-8589.patch, hadoop-8589-sanjay.patch, 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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