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https://issues.apache.org/jira/browse/YARN-7939?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16419780#comment-16419780
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Gour Saha commented on YARN-7939:
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[~eyang], for all modifications to a service in a service collection, PUT is
the HTTP verb we use. We don't need any more verbs. Since there are multiple
different modifications expressed through a single verb PUT, we need to express
the desired state or explicit property we want to change (like lifetime). This
is very similar to say what Ambari uses - state INSTALLED to stop a service and
state STARTED to start a service.
> Yarn Service Upgrade: add support to upgrade a component instance
> ------------------------------------------------------------------
>
> Key: YARN-7939
> URL: https://issues.apache.org/jira/browse/YARN-7939
> Project: Hadoop YARN
> Issue Type: Sub-task
> Reporter: Chandni Singh
> Assignee: Chandni Singh
> Priority: Major
> Attachments: YARN-7939.001.patch, YARN-7939.002.patch,
> YARN-7939.003.patch
>
>
> Yarn core supports in-place upgrade of containers. A yarn service can
> leverage that to provide in-place upgrade of component instances. Please see
> YARN-7512 for details.
> Will add support to upgrade a single component instance first and then
> iteratively add other APIs and features.
>
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