Eric Yang commented on YARN-8160:

Base on what I read from YARN-7973, the relaunch event is encapsulated in 
ContainerLauncher.  By passing parameter to ContainerLauncher event, it can 
trigger relaunch of container to happen.  Where YARN-7939 code have added a new 
transition for relaunch in ContainerImpl, and trigger a new type of relaunch 
event.  The alignment can happen if we surface YARN-7973 logic from 
ContainerLauncher and connect with the new transition event for doRelaunch.  It 
might help to refine relaunch logic and reuse some of the existing code.

> Yarn Service Upgrade: Support upgrade of service that use docker containers 
> ----------------------------------------------------------------------------
>                 Key: YARN-8160
>                 URL: https://issues.apache.org/jira/browse/YARN-8160
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Chandni Singh
>            Assignee: Chandni Singh
>            Priority: Major
> Ability to upgrade dockerized  yarn native services.
> Ref: YARN-5637

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