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Date: Fri, 20 Jan 2012 03:47:39 +0000 (UTC)
From: "Hudson (Commented) (JIRA)" <jira@apache.org>
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Subject: [jira] [Commented] (HADOOP-7982) UserGroupInformation fails to
 login if thread's context classloader can't load HadoopLoginModule
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    [ https://issues.apache.org/jira/browse/HADOOP-7982?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13189604#comment-13189604 ] 

Hudson commented on HADOOP-7982:
--------------------------------

Integrated in Hadoop-Common-0.23-Commit #391 (See [https://builds.apache.org/job/Hadoop-Common-0.23-Commit/391/])
    HADOOP-7982. UserGroupInformation fails to login if thread's context classloader can't load HadoopLoginModule. Contributed by Todd Lipcon.

todd : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1233750
Files : 
* /hadoop/common/branches/branch-0.23/hadoop-common-project/hadoop-common/CHANGES.txt
* /hadoop/common/branches/branch-0.23/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/security/UserGroupInformation.java

                
> UserGroupInformation fails to login if thread's context classloader can't load HadoopLoginModule
> ------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-7982
>                 URL: https://issues.apache.org/jira/browse/HADOOP-7982
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: security
>    Affects Versions: 0.23.0, 1.0.0
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>             Fix For: 0.24.0, 0.23.1, 1.1.0
>
>         Attachments: hadoop-7982-branch-1.txt, hadoop-7982.txt
>
>
> In a few hard-to-reproduce situations, we've seen a problem where the UGI login call causes a failure to login exception with the following cause:
> Caused by: javax.security.auth.login.LoginException: unable to find 
> LoginModule class: org.apache.hadoop.security.UserGroupInformation 
> $HadoopLoginModule
> After a bunch of debugging, I determined that this happens when the login occurs in a thread whose Context ClassLoader has been set to null.

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