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https://issues.apache.org/jira/browse/YARN-6092?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15874229#comment-15874229
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Tao Yang commented on YARN-6092:
--------------------------------
Hi，[~ajithshetty]. I found this problem when doing test on hadoop-2.9, and I
would like to fix it if you have not started. Thanks.
> Refreshing CapacityScheduler page throws NPE
> --------------------------------------------
>
> Key: YARN-6092
> URL: https://issues.apache.org/jira/browse/YARN-6092
> Project: Hadoop YARN
> Issue Type: Bug
> Reporter: Rohith Sharma K S
> Assignee: Ajith S
>
> It is observe that RM CapacityScheduler page throw NPE in RM logs.
> Application was running and asking for new allocation.
> {noformat}
> Caused by: java.lang.NullPointerException
> at
> org.apache.hadoop.yarn.server.resourcemanager.webapp.CapacitySchedulerPage$HealthBlock.render(CapacitySchedulerPage.java:551)
> at
> org.apache.hadoop.yarn.webapp.view.HtmlBlock.render(HtmlBlock.java:69)
> at
> org.apache.hadoop.yarn.webapp.view.HtmlBlock.renderPartial(HtmlBlock.java:79)
> at org.apache.hadoop.yarn.webapp.View.render(View.java:235)
> at
> org.apache.hadoop.yarn.webapp.view.HtmlBlock$Block.subView(HtmlBlock.java:43)
> at org.apache.hadoop.yarn.webapp.hamlet.Hamlet._(Hamlet.java:30354)
> at
> org.apache.hadoop.yarn.server.resourcemanager.webapp.CapacitySchedulerPage$QueuesBlock.render(CapacitySchedulerPage.java:471)
> {noformat}
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