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https://issues.apache.org/jira/browse/YARN-4454?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15067347#comment-15067347
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Bibin A Chundatt commented on YARN-4454:
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[~leftnoteasy] Thank you for review and commit.
> NM to nodelabel mapping going wrong after RM restart
> ----------------------------------------------------
>
> Key: YARN-4454
> URL: https://issues.apache.org/jira/browse/YARN-4454
> Project: Hadoop YARN
> Issue Type: Bug
> Reporter: Bibin A Chundatt
> Assignee: Bibin A Chundatt
> Priority: Critical
> Fix For: 2.8.0
>
> Attachments: 0001-YARN-4454.patch, test.patch
>
>
> *Nodelabel mapping with NodeManager is going wrong if combination of
> hostname and then NodeId is used to update nodelabel mapping*
> *Steps to reproduce*
> 1.Create cluster with 2 NM
> 2.Add label X,Y to cluster
> 3.replace Label of node 1 using <HOSTNAME1:PORT>,x
> 4.replace label for node 1 by <HOSTNAME1>,y
> 5.Again replace label of node 1 by <HOSTNAME1:PORT>,x
> Check cluster label mapping HOSTNAME1 will be mapped with X
> Now restart RM 2 times NODE LABEL mapping of HOSTNAME1:PORT changes to Y
> {noformat}
> 2015-12-14 17:17:54,901 INFO
> org.apache.hadoop.yarn.nodelabels.CommonNodeLabelsManager: Add labels:
> [<ResourcePool_1:exclusivity=true>,<ResourcePool_null:exclusivity=true>]
> 2015-12-14 17:17:54,905 INFO
> org.apache.hadoop.yarn.nodelabels.CommonNodeLabelsManager: REPLACE labels on
> nodes:
> 2015-12-14 17:17:54,906 INFO
> org.apache.hadoop.yarn.nodelabels.CommonNodeLabelsManager:
> NM=host-10-19-92-188:64318, labels=[ResourcePool_1]
> 2015-12-14 17:17:54,906 INFO
> org.apache.hadoop.yarn.nodelabels.CommonNodeLabelsManager:
> NM=host-10-19-92-188:0, labels=[ResourcePool_null]
> 2015-12-14 17:17:54,906 INFO
> org.apache.hadoop.yarn.nodelabels.CommonNodeLabelsManager:
> NM=host-10-19-92-187:64318, labels=[ResourcePool_null]
> {noformat}
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