[MAPREDUCE-2618] MR-279: 0 map, 0 reduce job fails with Null Pointer Exception

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.23.0
• Component/s: mrv2
• Hadoop Flags: Reviewed
• Tags: mrv2
• Assignee: Jeffrey Naisbitt
• Reporter: Jeffrey Naisbitt
• Created: 23/Jun/11 15:46
• Updated: 15/Nov/11 00:50
• Resolved: 27/Jun/11 18:57

Description

A 0 map, 0 reduce job fails with an NPE. This case works fine on hadoop-0.20.x. The job should succeed and run setup/cleanup code - with no tasks. Below is the stacktrace:

11/06/05 19:35:37 WARN mapred.ClientServiceDelegate:
StackTrace: java.lang.NullPointerException
at org.apache.hadoop.mapreduce.v2.app.job.impl.JobImpl.getTaskAttemptCompletionEvents(JobImpl.java:498)
at
org.apache.hadoop.mapreduce.v2.app.client.MRClientService$MRClientProtocolHandler.getTaskAttemptCompletionEvents(MRClientService.java:290)
at
org.apache.hadoop.mapreduce.v2.api.impl.pb.service.MRClientProtocolPBServiceImpl.getTaskAttemptCompletionEvents(MRClientProtocolPBServiceImpl.java:139)
at
org.apache.hadoop.yarn.proto.MRClientProtocol$MRClientProtocolService$2.callBlockingMethod(MRClientProtocol.java:195)
at org.apache.hadoop.yarn.ipc.ProtoOverHadoopRpcEngine$TunnelResponder.call(ProtoOverHadoopRpcEngine.java:168)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.hadoop.ipc.WritableRpcEngine$Server.call(WritableRpcEngine.java:420)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1406)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1402)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:396)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1094)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1400)