[jira] [Created] (YARN-6801) NPE in RM while setting collectors map in NodeHeartbeatResponse

["Vrushali C (JIRA)" <ji...@apache.org>]

Vrushali C created YARN-6801:
--------------------------------

             Summary: NPE in RM while setting collectors map in NodeHeartbeatResponse
                 Key: YARN-6801
                 URL: https://issues.apache.org/jira/browse/YARN-6801
             Project: Hadoop YARN
          Issue Type: Sub-task
          Components: timelineserver
    Affects Versions: YARN-5355, YARN-5355-branch-2
            Reporter: Vrushali C
            Assignee: Vrushali C



Null Pointer Exception seen in ResourceTrackerService#setAppCollectorsMapToResponse call 

{code}
2017-06-22 22:24:01,437 WARN org.apache.hadoop.ipc.Server: IPC Server handler 49 on 8031, call org.apache.hadoop.yarn.server.api.ResourceTrackerPB.nodeHeartbeat from 10.35.172.116:44399 Call#3929 Retry#0
java.lang.NullPointerException
        at org.apache.hadoop.yarn.server.resourcemanager.ResourceTrackerService.setAppCollectorsMapToResponse(ResourceTrackerService.java:467)
        at org.apache.hadoop.yarn.server.resourcemanager.ResourceTrackerService.nodeHeartbeat(ResourceTrackerService.java:447)
        at org.apache.hadoop.yarn.server.api.impl.pb.service.ResourceTrackerPBServiceImpl.nodeHeartbeat(ResourceTrackerPBServiceImpl.java:68)
        at org.apache.hadoop.yarn.proto.ResourceTracker$ResourceTrackerService$2.callBlockingMethod(ResourceTracker.java:81)
        at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:619)
        at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:962)
        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2084)
        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2080)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:415)
        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1645)
        at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2078)
{code}

It correlates to RM invoking setAppCollectorsMapToResponse and calling 

{code}
      AppCollectorData appCollectorData = rmApps.get(appId).getCollectorData();
{code}

If the app object is not present in the list of running app ids, then this will throw NPE.

Filing jira to fix it. 



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