[ 
https://issues.apache.org/jira/browse/YARN-10510?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17247288#comment-17247288
 ] 

Hadoop QA commented on YARN-10510:
----------------------------------

| (x) *{color:red}-1 overall{color}* |
\\
\\
|| Vote || Subsystem || Runtime ||  Logfile || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue}  0m  
0s{color} | {color:blue}{color} | {color:blue} Docker mode activated. {color} |
| {color:red}-1{color} | {color:red} patch {color} | {color:red}  0m 12s{color} 
| {color:red}{color} | {color:red} YARN-10510 does not apply to trunk. Rebase 
required? Wrong Branch? See https://wiki.apache.org/hadoop/HowToContribute for 
help. {color} |
\\
\\
|| Subsystem || Report/Notes ||
| JIRA Issue | YARN-10510 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/13016854/YARN-10510.001.patch |
| Console output | 
https://ci-hadoop.apache.org/job/PreCommit-YARN-Build/372/console |
| versions | git=2.17.1 |
| Powered by | Apache Yetus 0.13.0-SNAPSHOT https://yetus.apache.org |


This message was automatically generated.



> TestAppPage.testAppBlockRenderWithNullCurrentAppAttempt  will cause 
> NullPointerException
> ----------------------------------------------------------------------------------------
>
>                 Key: YARN-10510
>                 URL: https://issues.apache.org/jira/browse/YARN-10510
>             Project: Hadoop YARN
>          Issue Type: Test
>          Components: yarn
>    Affects Versions: 3.2.1
>            Reporter: tuyu
>            Priority: Minor
>             Fix For: 3.2.1
>
>         Attachments: YARN-10510.001.patch
>
>
> run TestAppPage.testAppBlockRenderWithNullCurrentAppAttempt will cause blow 
> exception
> {code:java}
> 2020-12-01 20:16:41,412 ERROR [main] webapp.AppBlock 
> (AppBlock.java:render(124)) - Failed to read the application 
> application_1234_0000.
> java.lang.NullPointerException
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.webapp.RMAppBlock.getApplicationReport(RMAppBlock.java:218)
>       at 
> org.apache.hadoop.yarn.server.webapp.AppBlock.render(AppBlock.java:112)
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.webapp.RMAppBlock.render(RMAppBlock.java:71)
>       at 
> org.apache.hadoop.yarn.webapp.view.HtmlBlock.render(HtmlBlock.java:69)
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.webapp.TestAppPage.testAppBlockRenderWithNullCurrentAppAttempt(TestAppPage.java:92)
>       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>       at 
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
>       at 
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>       at java.lang.reflect.Method.invoke(Method.java:498)
>       at 
> org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
>       at 
> org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
>       at 
> org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
>       at 
> org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
>       at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
>       at 
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
>       at 
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
>       at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
>       at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
>       at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
>       at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
>       at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
>       at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
>       at org.junit.runner.JUnitCore.run(JUnitCore.java:160)
>       at 
> com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:69)
>       at 
> com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
>       at 
> com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:220)
>       at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:53)
> Disconnected from the target VM, address: '127.0.0.1:60623', transport: 
> 'socket'
> {code}
> because of  mockClientRMService not mock getApplicationReport and 
> getApplicationAttempts interface



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