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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-1587) NPE in JobClient querying an (empty) queue
Date Wed, 10 Mar 2010 14:05:27 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-1587?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12843565#action_12843565
] 

Steve Loughran commented on MAPREDUCE-1587:
-------------------------------------------

Once I submit one job, this works
{code}
  [sshexec] 10/03/10 14:04:36 WARN conf.Configuration: DEPRECATED: hadoop-site.xml found in
the classpath. Usage of hadoop-site.xml is deprecated. Instead use core-site.xml, mapred-site.xml
and hdfs-site.xml to override properties of core-default.xml, mapred-default.xml and hdfs-default.xml
respectively
  [sshexec] 10/03/10 14:04:37 INFO security.Groups: Group mapping impl=org.apache.hadoop.security.ShellBasedUnixGroupsMapping;
cacheTimeout=300000
  [sshexec] Queue Name : default 
  [sshexec] Queue State : running 
  [sshexec] Scheduling Info : N/A 
  [sshexec] ======================
{code}

Assumption: until that first job is sent in, you can't ask for queue info

> NPE in JobClient querying an (empty) queue
> ------------------------------------------
>
>                 Key: MAPREDUCE-1587
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1587
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: client
>    Affects Versions: 0.22.0
>         Environment: Suse Linux Java 6u15
>            Reporter: Steve Loughran
>            Priority: Minor
>
> Getting a stack trace on a VM-hosted cluster with an empty queue. Thought maybe it was
the -verbose option, but no, remove that and I still see it.
> {code}
> java org.apache.hadoop.mapred.JobQueueClient -list -showjobs -verbose
>   [sshexec] 10/03/10 13:56:21 INFO security.Groups: Group mapping impl=org.apache.hadoop.security.ShellBasedUnixGroupsMapping;
cacheTimeout=300000
>   [sshexec] 10/03/10 13:56:21 INFO jvm.JvmMetrics: Initializing JVM Metrics with processName=JobTracker,
sessionId=
>   [sshexec] Exception in thread "main" 
>   [sshexec] java.lang.NullPointerException
>   [sshexec] 	at org.apache.hadoop.mapred.JobClient.getJobQueueInfoArray(JobClient.java:921)
>   [sshexec] 	at org.apache.hadoop.mapred.JobClient.getRootQueues(JobClient.java:937)
>   [sshexec] 	at org.apache.hadoop.mapred.JobQueueClient.displayQueueList(JobQueueClient.java:142)
>   [sshexec] 	at org.apache.hadoop.mapred.JobQueueClient.run(JobQueueClient.java:96)
>   [sshexec] 	at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
>   [sshexec] 	at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:79)
>   [sshexec] 	at org.apache.hadoop.mapred.JobQueueClient.main(JobQueueClient.java:232)
> {code}

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