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https://issues.apache.org/jira/browse/YARN-7984?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Eric Yang updated YARN-7984:
----------------------------
    Fix Version/s: 3.2.0

> Delete registry entries from ZK on ServiceClient stop and clean up 
> stop/destroy behavior
> ----------------------------------------------------------------------------------------
>
>                 Key: YARN-7984
>                 URL: https://issues.apache.org/jira/browse/YARN-7984
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: yarn-native-services
>            Reporter: Billie Rinaldi
>            Assignee: Billie Rinaldi
>            Priority: Critical
>             Fix For: 3.2.0
>
>         Attachments: YARN-7984.1.patch, YARN-7984.2.patch
>
>
> The service records written to the registry are removed by ServiceClient on a 
> destroy call, but not on a stop call. The service AM does have some code to 
> clean up the registry entries when component instances are stopped, but if 
> the AM is killed before it has a chance to perform the cleanup, these entries 
> will be left in ZooKeeper. It would be better to clean these up in the stop 
> call, so that RegistryDNS does not provide lookups for containers that don't 
> exist.
> Additional stop/destroy behavior improvements include fixing errors / 
> unexpected behavior related to:
> * destroying a saved (not launched or started) service
> * destroying a stopped service
> * destroying a destroyed service
> * returning proper exit codes for destroy failures
> * performing other client operations on saved services (fixing NPEs)



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