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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-9761) ViewFileSystem#rename fails when using DistributedFileSystem
Date Wed, 31 Jul 2013 23:07:48 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-9761?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13725811#comment-13725811

Hadoop QA commented on HADOOP-9761:

{color:green}+1 overall{color}.  Here are the results of testing the latest attachment 
  against trunk revision .

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:green}+1 tests included{color}.  The patch appears to include 1 new or modified
test files.

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of
javac compiler warnings.

    {color:green}+1 javadoc{color}.  The javadoc tool did not generate any warning messages.

    {color:green}+1 eclipse:eclipse{color}.  The patch built with eclipse:eclipse.

    {color:green}+1 findbugs{color}.  The patch does not introduce any new Findbugs (version
1.3.9) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase the total number
of release audit warnings.

    {color:green}+1 core tests{color}.  The patch passed unit tests in hadoop-common-project/hadoop-common

    {color:green}+1 contrib tests{color}.  The patch passed contrib unit tests.

Test results: https://builds.apache.org/job/PreCommit-HADOOP-Build/2897//testReport/
Console output: https://builds.apache.org/job/PreCommit-HADOOP-Build/2897//console

This message is automatically generated.
> ViewFileSystem#rename fails when using DistributedFileSystem
> ------------------------------------------------------------
>                 Key: HADOOP-9761
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9761
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: viewfs
>    Affects Versions: 3.0.0, 2.1.0-beta
>            Reporter: Andrew Wang
>            Assignee: Andrew Wang
>         Attachments: 0001-HADOOP-9761.004.patch, hadoop-9761-1.patch, hadoop-9761-1.patch,
> ViewFileSystem currently passes unqualified paths (no scheme or authority) to underlying
FileSystems when doing a rename. DistributedFileSystem symlink support added in HADOOP-9418
needs to qualify and check rename sources and destinations since cross-filesystem renames
aren't supported, so this breaks in the following way
> - Default FS URI is configured to viewfs://<viewfs>
> - When doing a rename, ViewFileSystem checks to make sure both src and dst FileSystems
are the same (which they are, both in same DFS), and then calls DistributedFileSystem#rename
with unqualified "remainder" paths
> - Since these paths are unqualified, DFS qualifies them with the default FS to check
that it can do the rename. This turns it into viewfs://<viewfs>/<path>
> - Since viewfs://<viewfs> is not the DFS's URI, DFS errors out the rename.

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