[jira] [Created] (YARN-1556) NPE getting application report with a null appId

["Steve Loughran (JIRA)" <ji...@apache.org>]

Steve Loughran created YARN-1556:
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             Summary: NPE getting application report with a null appId
                 Key: YARN-1556
                 URL: https://issues.apache.org/jira/browse/YARN-1556
             Project: Hadoop YARN
          Issue Type: Bug
            Reporter: Steve Loughran
            Priority: Trivial


If you accidentally pass in a null appId to get application report, you get an NPE back. This is arguably as intended, except that maybe a guard statement could report this in such a way as to make it easy for callers to track down the cause.
{code}
java.lang.NullPointerException: java.lang.NullPointerException
org.apache.hadoop.ipc.RemoteException(java.lang.NullPointerException): java.lang.NullPointerException
	at java.util.concurrent.ConcurrentHashMap.hash(ConcurrentHashMap.java:333)
	at java.util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:988)
	at org.apache.hadoop.yarn.server.resourcemanager.ClientRMService.getApplicationReport(ClientRMService.java:243)
	at org.apache.hadoop.yarn.api.impl.pb.service.ApplicationClientProtocolPBServiceImpl.getApplicationReport(ApplicationClientProtocolPBServiceImpl.java:120)
	at org.apache.hadoop.yarn.proto.ApplicationClientProtocol$ApplicationClientProtocolService$2.callBlockingMethod(ApplicationClientProtocol.java:241)
	at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:585)
	at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:928)
	at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2048)
	at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2044)
	at java.security.AccessController.doPrivileged(Native Method)
	at javax.security.auth.Subject.doAs(Subject.java:415)
	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1491)
	at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2042)

	at org.apache.hadoop.ipc.Client.call(Client.java:1347)
	at org.apache.hadoop.ipc.Client.call(Client.java:1300)
	at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:206)
	at com.sun.proxy.$Proxy75.getApplicationReport(Unknown Source)
	at org.apache.hadoop.yarn.api.impl.pb.client.ApplicationClientProtocolPBClientImpl.getApplicationReport(ApplicationClientProtocolPBClientImpl.java:137)
	... 28 more
{code}







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