Junping Du updated YARN-959:
    Affects Version/s: 2.6.0

> Add ApplicationAttemptId into container environment
> ---------------------------------------------------
>                 Key: YARN-959
>                 URL: https://issues.apache.org/jira/browse/YARN-959
>             Project: Hadoop YARN
>          Issue Type: Improvement
>    Affects Versions: 2.1.0-beta, 2.6.0
>            Reporter: Bikas Saha
> Currently, AM's and containers have to read the container id and then derive 
> the application attempt id from it. While its convenient for YARN to tightly 
> couple container id with application attempt id, it is something that should 
> not be exposed to users. Its easy to let users know about their application 
> attempt id via env instead of requiring them to pull it out of the container 
> id.

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