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https://issues.apache.org/jira/browse/YARN-10540?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17254133#comment-17254133
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Jim Brennan commented on YARN-10540:
------------------------------------

Thanks [~sunilg]!

> Node page is broken in YARN UI1 and UI2 including RMWebService api for nodes
> ----------------------------------------------------------------------------
>
>                 Key: YARN-10540
>                 URL: https://issues.apache.org/jira/browse/YARN-10540
>             Project: Hadoop YARN
>          Issue Type: Task
>          Components: webapp
>    Affects Versions: 3.2.2
>            Reporter: Sunil G
>            Assignee: Jim Brennan
>            Priority: Critical
>             Fix For: 3.4.0, 3.3.1, 3.1.5, 2.10.2, 3.2.3
>
>         Attachments: Mac-Yarn-UI.png, Screenshot 2020-12-19 at 11.01.43 
> PM.png, Screenshot 2020-12-19 at 11.02.14 PM.png, Screenshot 2020-12-23 at 
> 8.24.42 PM.png, YARN-10540.001.patch, Yarn-UI-Ubuntu.png, osx-yarn-ui2.png, 
> yarnodes.png, yarnui2onubuntu.png
>
>
> YARN-10450 added changes in NodeInfo class.
> Various exceptions are showing while accessing UI2 and UI1 NODE pages. 
> {code:java}
> Caused by: java.lang.NullPointerException
>         at 
> org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.NodeInfo.<init>(NodeInfo.java:103)
>         at 
> org.apache.hadoop.yarn.server.resourcemanager.webapp.NodesPage$NodesBlock.render(NodesPage.java:164)
>         at 
> org.apache.hadoop.yarn.webapp.view.HtmlBlock.render(HtmlBlock.java:69)
>         at 
> org.apache.hadoop.yarn.webapp.view.HtmlBlock.renderPartial(HtmlBlock.java:79)
>         at org.apache.hadoop.yarn.webapp.View.render(View.java:243)
>         at 
> org.apache.hadoop.yarn.webapp.view.HtmlPage$Page.subView(HtmlPage.java:49)
>         at 
> org.apache.hadoop.yarn.webapp.hamlet2.HamletImpl$EImp._v(HamletImpl.java:117)
>         at org.apache.hadoop.yarn.webapp.hamlet2.Hamlet$TD.__(Hamlet.java:848)
>         at 
> org.apache.hadoop.yarn.webapp.view.TwoColumnLayout.render(TwoColumnLayout.java:71)
>         at 
> org.apache.hadoop.yarn.webapp.view.HtmlPage.render(HtmlPage.java:82)
>         at 
> org.apache.hadoop.yarn.webapp.Controller.render(Controller.java:216)
>         at 
> org.apache.hadoop.yarn.server.resourcemanager.webapp.RmController.nodes(RmController.java:70)
>  {code}
> {code:java}
> 2020-12-19 22:55:54,846 WARN 
> org.apache.hadoop.yarn.webapp.GenericExceptionHandler: INTERNAL_SERVER_ERROR
> java.lang.NullPointerException
>         at 
> org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.NodeInfo.<init>(NodeInfo.java:103)
>         at 
> org.apache.hadoop.yarn.server.resourcemanager.webapp.RMWebServices.getNodes(RMWebServices.java:450)
>         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)
> {code}



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