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From "Andrey Klochkov (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-8589) ViewFs tests fail when tests dir is under Jenkins home dir
Date Wed, 11 Jul 2012 23:27:36 GMT
Andrey Klochkov created HADOOP-8589:
---------------------------------------

             Summary: ViewFs tests fail when tests dir is under Jenkins home dir
                 Key: HADOOP-8589
                 URL: https://issues.apache.org/jira/browse/HADOOP-8589
             Project: Hadoop Common
          Issue Type: Bug
          Components: fs, test
    Affects Versions: 2.0.0-alpha, 0.23.1
            Reporter: Andrey Klochkov


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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