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https://issues.apache.org/jira/browse/YARN-4406?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15034604#comment-15034604
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Daniel Templeton commented on YARN-4406:
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Looking at the {{NodesListManager}}, it looks to me like
{{ClusterMetrics.getMetrics().getDecomissionedNMs()}} is set to the size of the
excludes list, but {{getUnusableNodes()}} returns the list of nodes that have
been decommissioned since the last reboot.
> RM Web UI continues to show decommissioned nodes even after RM restart
> ----------------------------------------------------------------------
>
> Key: YARN-4406
> URL: https://issues.apache.org/jira/browse/YARN-4406
> Project: Hadoop YARN
> Issue Type: Bug
> Components: resourcemanager
> Reporter: Ray Chiang
> Priority: Minor
>
> If you start up a cluster, decommission a NodeManager, and restart the RM,
> the decommissioned node list will still show a positive number (1 in the case
> of 1 node) and if you click on the list, it will be empty.
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