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Jeffrey Naisbitt commented on MAPREDUCE-2618: --------------------------------------------- I thought I had run all the tests, but apparently I didn't pay enough attention to the results... I originally made checkJobCompleteSuccess public for testing, but I changed things so it does only need to be package-scoped now - good catch. I renamed logJobHistory as you recommended. Thanks for the review! I'll submit an updated patch soon. > MR-279: 0 map, 0 reduce job fails with Null Pointer Exception > ------------------------------------------------------------- > > Key: MAPREDUCE-2618 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-2618 > Project: Hadoop Map/Reduce > Issue Type: Bug > Components: mrv2 > Reporter: Jeffrey Naisbitt > Assignee: Jeffrey Naisbitt > Fix For: 0.23.0 > > Attachments: MAPREDUCE-2618.patch > > > 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) -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira