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https://issues.apache.org/jira/browse/YARN-8349?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16497045#comment-16497045
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Billie Rinaldi commented on YARN-8349:
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Thanks for the review, [~leftnoteasy]. I agree, moving the call to 
FinalTransition and changing the method name make sense. Regarding comment 3, 
the registry cleanup is only performed for applications with type yarn-service. 
The AppAdminClient.createAppAdminClient method uses the application type to 
determine which AppAdminClient subclass to instantiate.

> Remove YARN registry entries when a service is killed by the RM
> ---------------------------------------------------------------
>
>                 Key: YARN-8349
>                 URL: https://issues.apache.org/jira/browse/YARN-8349
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: yarn-native-services
>    Affects Versions: 3.2.0, 3.1.1
>            Reporter: Shane Kumpf
>            Assignee: Billie Rinaldi
>            Priority: Major
>         Attachments: YARN-8349.1.patch, YARN-8349.2.patch
>
>
> As the title states, when a service is killed by the RM (for exceeding its 
> lifetime for example), the YARN registry entries should be cleaned up.
> Without cleanup, DNS can contain multiple hostnames for a single IP address 
> in the case where IPs are reused. This impacts reverse lookups, which breaks 
> services, such as kerberos, that depend on those lookups.



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