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From "Todd Lipcon (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-7982) UserGroupInformation fails to login if thread's context classloader can't load HadoopLoginModule
Date Thu, 19 Jan 2012 01:48:39 GMT
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: 1.0.0, 0.23.0
            Reporter: Todd Lipcon
            Assignee: Todd Lipcon


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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