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Date: Tue, 3 Aug 2010 04:33:16 -0400 (EDT)
From: "Ravi Gummadi (JIRA)" <jira@apache.org>
To: mapreduce-issues@hadoop.apache.org
Subject: [jira] Commented: (MAPREDUCE-1992) NPE in JobTracker's constructor
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    [ https://issues.apache.org/jira/browse/MAPREDUCE-1992?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12894843#action_12894843 ] 

Ravi Gummadi commented on MAPREDUCE-1992:
-----------------------------------------

Is this related to MAPREDUCE-1945 which added this call to UserGroupInformation.isLoginKeytabBased() recently ?

> NPE in JobTracker's constructor
> -------------------------------
>
>                 Key: MAPREDUCE-1992
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1992
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: jobtracker
>            Reporter: Ravi Gummadi
>
> On my local machine, JobTracker is coming up with current trunk. Logs show the following NPE:
> 2010-08-03 14:01:41,449 FATAL org.apache.hadoop.mapred.JobTracker: java.lang.NullPointerException
>   at org.apache.hadoop.security.UserGroupInformation.isLoginKeytabBased(UserGroupInformation.java:703)
>   at org.apache.hadoop.mapred.JobTracker.<init>(JobTracker.java:1383)
>   at org.apache.hadoop.mapred.JobTracker.startTracker(JobTracker.java:275)
>   at org.apache.hadoop.mapred.JobTracker.startTracker(JobTracker.java:267)
>   at org.apache.hadoop.mapred.JobTracker.startTracker(JobTracker.java:262)
>   at org.apache.hadoop.mapred.JobTracker.main(JobTracker.java:4236)
> 2010-08-03 14:01:41,449 INFO org.apache.hadoop.mapred.JobTracker: SHUTDOWN_MSG:

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