Karthik Kambatla commented on YARN-1489:

Created a couple of sub-tasks based on an offline discussion with Anubhav, 
Bikas, Jian and Vinod.

> [Umbrella] Work-preserving ApplicationMaster restart
> ----------------------------------------------------
>                 Key: YARN-1489
>                 URL: https://issues.apache.org/jira/browse/YARN-1489
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: Vinod Kumar Vavilapalli
>            Assignee: Vinod Kumar Vavilapalli
>         Attachments: Work preserving AM restart.pdf
> Today if AMs go down,
>  - RM kills all the containers of that ApplicationAttempt
>  - New ApplicationAttempt doesn't know where the previous containers are 
> running
>  - Old running containers don't know where the new AM is running.
> We need to fix this to enable work-preserving AM restart. The later two 
> potentially can be done at the app level, but it is good to have a common 
> solution for all apps where-ever possible.

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