Receiving NPE occasionally on RunningJob.getCounters() call
-----------------------------------------------------------
Key: MAPREDUCE-2470
URL: https://issues.apache.org/jira/browse/MAPREDUCE-2470
Project: Hadoop Map/Reduce
Issue Type: Bug
Components: client
Affects Versions: 0.21.0
Environment: FreeBSD, Java6, Hadoop r0.21.0
Reporter: Aaron Baff
This is running in a Java daemon that is used as an interface (Thrift) to get
information and data from MR Jobs. Using JobClient.getJob(JobID) I successfully
get a RunningJob object (I'm checking for NULL), and then rarely I get an NPE
when I do RunningJob.getCounters(). This seems to occur after the daemon has
been up and running for a while, and in the event of an Exception, I close the
JobClient, set it to NULL, and a new one should then be created on the next
request for data. Yet, I still seem to be unable to fetch the Counters. Below
is the stack trace.
java.lang.NullPointerException
at org.apache.hadoop.mapred.Counters.downgrade(Counters.java:77)
at
org.apache.hadoop.mapred.JobClient$NetworkedJob.getCounters(JobClient.java:381)
at
com.telescope.HadoopThrift.service.ServiceImpl.getReportResults(ServiceImpl.java:350)
at
com.telescope.HadoopThrift.gen.HadoopThrift$Processor$getReportResults.process(HadoopThrift.java:545)
at
com.telescope.HadoopThrift.gen.HadoopThrift$Processor.process(HadoopThrift.java:421)
at
org.apache.thrift.server.TNonblockingServer$FrameBuffer.invoke(TNonblockingServer.java:697)
at
org.apache.thrift.server.THsHaServer$Invocation.run(THsHaServer.java:317)
at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:619)
--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira
