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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-6545) Cached FileSystem objects can lead to wrong token being used in setting up connections
Date Mon, 15 Feb 2010 18:49:27 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-6545?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12833921#action_12833921

Hadoop QA commented on HADOOP-6545:

+1 overall.  Here are the results of testing the latest attachment 
  against trunk revision 910169.

    +1 @author.  The patch does not contain any @author tags.

    +1 tests included.  The patch appears to include 3 new or modified tests.

    +1 javadoc.  The javadoc tool did not generate any warning messages.

    +1 javac.  The applied patch does not increase the total number of javac compiler warnings.

    +1 findbugs.  The patch does not introduce any new Findbugs warnings.

    +1 release audit.  The applied patch does not increase the total number of release audit

    +1 core tests.  The patch passed core unit tests.

    +1 contrib tests.  The patch passed contrib unit tests.

Test results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch-h4.grid.sp2.yahoo.net/361/testReport/
Findbugs warnings: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch-h4.grid.sp2.yahoo.net/361/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch-h4.grid.sp2.yahoo.net/361/artifact/trunk/build/test/checkstyle-errors.html
Console output: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch-h4.grid.sp2.yahoo.net/361/console

This message is automatically generated.

> Cached FileSystem objects can lead to wrong token being used in setting up connections
> --------------------------------------------------------------------------------------
>                 Key: HADOOP-6545
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6545
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: security
>    Affects Versions: 0.22.0
>            Reporter: Devaraj Das
>            Assignee: Devaraj Das
>             Fix For: 0.22.0
>         Attachments: 6545-1.patch, 6545-2.patch
> The FileSystem class caches the filesystem objects that it creates for users. For some
cases, e.g., if the filesystem object is actually a DistributedFileSystem, it also has an
associated RPC client and hence an UGI for the respective user. This could lead to issues
to do with using the right credentials when connecting with the namenode. The credentials
in the UGI is never updated (even if the user in question now has new credentials) and in
case the cached UGI's credentials have expired, this would lead to authentication error whenever
there is a re-authentication (in the process of re-establishing connection to the namenode).

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