[MAPREDUCE-4279] getClusterStatus() fails with null pointer exception when running jobs in local mode

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.23.1, 2.0.0-alpha, 3.0.0-alpha1
• Fix Version/s: 2.0.3-alpha, 0.23.6
• Component/s: jobtracker
• Assignee: Devaraj Kavali
• Reporter: Rahul Jain
• Created: 22/May/12 20:43
• Updated: 12/May/16 18:23
• Resolved: 03/Jan/13 17:25

Description

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:

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)

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.