[MAPREDUCE-1587] NPE in JobClient querying an (empty) queue

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Cannot Reproduce
• Affects Version/s: 0.22.0
• Component/s: client

Environment

Suse Linux Java 6u15

• Assignee: Unassigned
• Reporter: Steve Loughran
• Created: 10/Mar/10 13:57
• Updated: 20/Jul/14 13:34
• Resolved: 20/Jul/14 13:34

Description

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.

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)