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https://issues.apache.org/jira/browse/YARN-10510?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17332955#comment-17332955
]
Akira Ajisaka commented on YARN-10510:
--------------------------------------
Hi [~tuyu], I couldn't reproduce the error. What command did you run?
> TestAppPage.testAppBlockRenderWithNullCurrentAppAttempt will cause
> NullPointerException
> ----------------------------------------------------------------------------------------
>
> Key: YARN-10510
> URL: https://issues.apache.org/jira/browse/YARN-10510
> Project: Hadoop YARN
> Issue Type: Test
> Components: test
> Reporter: tuyu
> Priority: Minor
> Labels: test
> 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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