Karthik Kambatla commented on YARN-2039:

Based on offline discussion with Anubhav, Bikas, Jian and Vinod, the control 
flow for notifying the AM of finished containers should be as follows:
# NM informs RM and holds on to the information (YARN-1336 should handle this 
as well)
# RM informs AM
# AM acks RM
# RM acks NM
# NM deletes the information

> Better reporting of finished containers to AMs
> ----------------------------------------------
>                 Key: YARN-2039
>                 URL: https://issues.apache.org/jira/browse/YARN-2039
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: nodemanager, resourcemanager
>    Affects Versions: 2.4.0
>            Reporter: Karthik Kambatla
>            Priority: Critical
> On RM restart, we shouldn't lose information about finished containers. 

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