[jira] [Updated] (YARN-3417) AM to be able to exit with a request saying "restart me with these (possibly updated) resource requirements"

["Arun Suresh (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/YARN-3417?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Arun Suresh updated YARN-3417:
------------------------------
    Issue Type: Bug  (was: Sub-task)
        Parent:     (was: YARN-4726)

> AM to be able to exit with a request saying "restart me with these (possibly updated) resource requirements"
> ------------------------------------------------------------------------------------------------------------
>
>                 Key: YARN-3417
>                 URL: https://issues.apache.org/jira/browse/YARN-3417
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: resourcemanager
>    Affects Versions: 2.7.0
>            Reporter: Steve Loughran
>            Assignee: Varun Saxena
>            Priority: Minor
>
> If an AM wants to reconfigure itself or restart with new resources, there's no way to do this without the active participation of a client.
> It can call System.exit and rely on YARN to restart it -but that counts as a failure and may lose the entire app. furthermore, that doesn't allow the AM to resize itself.
> A simple exit-code to be interpreted as restart-without-failure could handle the first case; an explicit call to indicate restart, including potentially new resource/label requirements, could be more reliabile, and certainly more flexible.



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