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From "Eli Collins (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-7982) UserGroupInformation fails to login if thread's context classloader can't load HadoopLoginModule
Date Thu, 19 Jan 2012 06:32:40 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-7982?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13188947#comment-13188947
] 

Eli Collins commented on HADOOP-7982:
-------------------------------------

+1 to the branch-1 patch
                
> 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
>         Attachments: hadoop-7982-branch-1.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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