[ 
https://issues.apache.org/jira/browse/YARN-1556?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14718352#comment-14718352
 ] 

Hadoop QA commented on YARN-1556:
---------------------------------

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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | pre-patch |  16m 41s | Pre-patch trunk compilation is 
healthy. |
| {color:green}+1{color} | @author |   0m  0s | The patch does not contain any 
@author tags. |
| {color:green}+1{color} | tests included |   0m  0s | The patch appears to 
include 1 new or modified test files. |
| {color:green}+1{color} | javac |   7m 45s | There were no new javac warning 
messages. |
| {color:green}+1{color} | javadoc |   9m 54s | There were no new javadoc 
warning messages. |
| {color:green}+1{color} | release audit |   0m 23s | The applied patch does 
not increase the total number of release audit warnings. |
| {color:green}+1{color} | checkstyle |   0m 51s | There were no new checkstyle 
issues. |
| {color:red}-1{color} | whitespace |   0m  0s | The patch has 1  line(s) that 
end in whitespace. Use git apply --whitespace=fix. |
| {color:green}+1{color} | install |   1m 32s | mvn install still works. |
| {color:green}+1{color} | eclipse:eclipse |   0m 33s | The patch built with 
eclipse:eclipse. |
| {color:green}+1{color} | findbugs |   1m 27s | The patch does not introduce 
any new Findbugs (version 3.0.0) warnings. |
| {color:green}+1{color} | yarn tests |  53m 33s | Tests passed in 
hadoop-yarn-server-resourcemanager. |
| | |  92m 44s | |
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|| Subsystem || Report/Notes ||
| Patch URL | 
http://issues.apache.org/jira/secure/attachment/12752960/YARN-1556.patch |
| Optional Tests | javadoc javac unit findbugs checkstyle |
| git revision | trunk / e166c03 |
| whitespace | 
https://builds.apache.org/job/PreCommit-YARN-Build/8933/artifact/patchprocess/whitespace.txt
 |
| hadoop-yarn-server-resourcemanager test log | 
https://builds.apache.org/job/PreCommit-YARN-Build/8933/artifact/patchprocess/testrun_hadoop-yarn-server-resourcemanager.txt
 |
| Test Results | 
https://builds.apache.org/job/PreCommit-YARN-Build/8933/testReport/ |
| Java | 1.7.0_55 |
| uname | Linux asf905.gq1.ygridcore.net 3.13.0-36-lowlatency #63-Ubuntu SMP 
PREEMPT Wed Sep 3 21:56:12 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux |
| Console output | 
https://builds.apache.org/job/PreCommit-YARN-Build/8933/console |


This message was automatically generated.

> 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
>          Components: client
>    Affects Versions: 2.7.1
>            Reporter: Steve Loughran
>            Assignee: Weiwei Yang
>            Priority: Trivial
>             Fix For: 2.8.0
>
>         Attachments: YARN-1556.patch
>
>
> 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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