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https://issues.apache.org/jira/browse/YARN-8740?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16601222#comment-16601222
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Bibin A Chundatt commented on YARN-8740:
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[~sunilg]
NodeAttributeMapping#processMapping when validMapping size is zero no need to
update dispatcher.
This approach avoid empty events.
Please review patch attached.
> Fix TestRMHA testcase failure
> -----------------------------
>
> Key: YARN-8740
> URL: https://issues.apache.org/jira/browse/YARN-8740
> Project: Hadoop YARN
> Issue Type: Sub-task
> Reporter: Bibin A Chundatt
> Assignee: Bibin A Chundatt
> Priority: Major
> Attachments: YARN-8740-YARN-3409.001.patch
>
>
> {code}
> Caused by: java.lang.NullPointerException
> at
> org.apache.hadoop.yarn.server.resourcemanager.nodelabels.NodeAttributesManagerImpl.internalUpdateAttributesOnNodes(NodeAttributesManagerImpl.java:223)
> at
> org.apache.hadoop.yarn.server.resourcemanager.nodelabels.NodeAttributesManagerImpl.processMapping(NodeAttributesManagerImpl.java:703)
> at
> org.apache.hadoop.yarn.server.resourcemanager.nodelabels.NodeAttributesManagerImpl.replaceNodeAttributes(NodeAttributesManagerImpl.java:671)
> at
> org.apache.hadoop.yarn.nodelabels.store.op.NodeAttributeMirrorOp.recover(NodeAttributeMirrorOp.java:56)
> at
> org.apache.hadoop.yarn.nodelabels.store.op.NodeAttributeMirrorOp.recover(NodeAttributeMirrorOp.java:35)
> {code}
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