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From "Jarek Jarcec Cecho (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-4279) getClusterStatus() fails with null pointer exception when running jobs in local mode
Date Thu, 03 Jan 2013 10:48:15 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-4279?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13542849#comment-13542849
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Jarek Jarcec Cecho commented on MAPREDUCE-4279:
-----------------------------------------------

I've recently detected this issue as well. Would it be possible to fix it?
                
> getClusterStatus() fails with null pointer exception when running jobs in local mode
> ------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-4279
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4279
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: jobtracker
>    Affects Versions: 0.23.1, 2.0.0-alpha, 3.0.0
>            Reporter: Rahul Jain
>            Assignee: Devaraj K
>         Attachments: MAPREDUCE-4279.patch
>
>
> While migrating code from 0.20.2 hadoop codebase to 0.23.1 we encountered this issue
for jobs run in local mode of execution:
> {code}
> java.lang.NullPointerException
> 	at org.apache.hadoop.mapred.JobClient.arrayToStringList(JobClient.java:783)
> 	at org.apache.hadoop.mapred.JobClient.access$600(JobClient.java:138)
> 	at org.apache.hadoop.mapred.JobClient$4.run(JobClient.java:815)
> 	at org.apache.hadoop.mapred.JobClient$4.run(JobClient.java:812)
> 	at java.security.AccessController.doPrivileged(Native Method)
> 	at javax.security.auth.Subject.doAs(Subject.java:396)
> 	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1177)
> 	at org.apache.hadoop.mapred.JobClient.getClusterStatus(JobClient.java:812)
> {code}
> We are using cloudera distribution CDH4b2 for testing, however the underlying code is
0.23.1 and I could see no difference in this implementation.

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