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https://issues.apache.org/jira/browse/YARN-8022?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16398065#comment-16398065
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Rohith Sharma K S commented on YARN-8022:
-----------------------------------------
committing shortly
> ResourceManager UI cluster/app/<app-id> page fails to render
> ------------------------------------------------------------
>
> Key: YARN-8022
> URL: https://issues.apache.org/jira/browse/YARN-8022
> Project: Hadoop YARN
> Issue Type: Bug
> Components: webapp
> Reporter: Tarun Parimi
> Assignee: Tarun Parimi
> Priority: Blocker
> Attachments: Screen Shot 2018-03-12 at 1.45.05 PM.png,
> YARN-8022.001.patch, YARN-8022.002.patch
>
>
> The page displays the message "Failed to read the attempts of the application"
>
> The following stack trace is observed in RM log.
> org.apache.hadoop.yarn.server.webapp.AppBlock: Failed to read the attempts of
> the application application_1520597233415_0002.
> java.lang.NullPointerException
> at org.apache.hadoop.yarn.server.webapp.AppBlock$3.run(AppBlock.java:283)
> at org.apache.hadoop.yarn.server.webapp.AppBlock$3.run(AppBlock.java:280)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:422)
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1682)
> at org.apache.hadoop.yarn.server.webapp.AppBlock.render(AppBlock.java:279)
> at
> org.apache.hadoop.yarn.server.resourcemanager.webapp.RMAppBlock.render(RMAppBlock.java:71)
> at org.apache.hadoop.yarn.webapp.view.HtmlBlock.render(HtmlBlock.java:69)
> at
> org.apache.hadoop.yarn.webapp.view.HtmlBlock.renderPartial(HtmlBlock.java:79)
> at org.apache.hadoop.yarn.webapp.View.render(View.java:235)
> at org.apache.hadoop.yarn.webapp.view.HtmlPage$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:212)
> at
> org.apache.hadoop.yarn.server.resourcemanager.webapp.RmController.app(RmController.java:54)
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