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https://issues.apache.org/jira/browse/YARN-7540?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16289536#comment-16289536
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Billie Rinaldi commented on YARN-7540:
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+1 for patch 006. This resolves issues with flex and save that I was seeing in
earlier patches. I noticed a bug in the ApiServer where it fails to destroy a
service that is stopped, but we can address this elsewhere since it is not
introduced in this patch.
> Convert yarn app cli to call yarn api services
> ----------------------------------------------
>
> Key: YARN-7540
> URL: https://issues.apache.org/jira/browse/YARN-7540
> Project: Hadoop YARN
> Issue Type: Sub-task
> Reporter: Eric Yang
> Assignee: Eric Yang
> Fix For: yarn-native-services
>
> Attachments: YARN-7540.001.patch, YARN-7540.002.patch,
> YARN-7540.003.patch, YARN-7540.004.patch, YARN-7540.005.patch,
> YARN-7540.006.patch
>
>
> For YARN docker application to launch through CLI, it works differently from
> launching through REST API. All application launched through REST API is
> currently stored in yarn user HDFS home directory. Application managed
> through CLI are stored into individual user's HDFS home directory. For
> consistency, we want to have yarn app cli to interact with API service to
> manage applications. For performance reason, it is easier to implement list
> all applications from one user's home directory instead of crawling all
> user's home directories. For security reason, it is safer to access only one
> user home directory instead of all users. Given the reasons above, the
> proposal is to change how {{yarn app -launch}}, {{yarn app -list}} and {{yarn
> app -destroy}} work. Instead of calling HDFS API and RM API to launch
> containers, CLI will be converted to call API service REST API resides in RM.
> RM perform the persist and operations to launch the actual application.
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