Wangda Tan updated YARN-4349:
    Attachment: YARN-4349.2.patch

Thanks for looking at this, [~liuml07]!.

Addressed your comments in ver.2 patch, also fixed findbugs warning.

> Support CallerContext in YARN
> -----------------------------
>                 Key: YARN-4349
>                 URL: https://issues.apache.org/jira/browse/YARN-4349
>             Project: Hadoop YARN
>          Issue Type: New Feature
>            Reporter: Wangda Tan
>            Assignee: Wangda Tan
>         Attachments: YARN-4349.1.patch, YARN-4349.2.patch
> More details about CallerContext please refer to description of HDFS-9184.
> From YARN's perspective, we should make following changes:
> - RMAuditLogger logs application's caller context when application submit by 
> user
> - Add caller context to application's data in ATS along with application 
> creation event
> From MR's perspective:
> - Set AppMaster container's context to YARN's application Id
> - Set Mapper/Reducer containers' context to task attempt id
> Protocol and RPC changes are done in HDFS-9184.

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