Sergey Shelukhin updated HIVE-17297:
    Attachment: HIVE-17297.patch

A WIP patch based on HIVE-17256.
This is missing 3 things
- code to take ducks away from low pri tasks when scheduling a previously 
delayed high pri - I think I'd add this where a TODO now is upon further code 
reading just now
- code to propagate duck info back in the heartbeat; this is only needed to 
resolve the common rare scenario of sending a request but not receiving a 
response after success, and will come after heartbeat is made protobuf, ideally.
- tests :)

> allow AM to use LLAP guaranteed tasks
> -------------------------------------
>                 Key: HIVE-17297
>                 URL: https://issues.apache.org/jira/browse/HIVE-17297
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Sergey Shelukhin
>            Assignee: Sergey Shelukhin
>         Attachments: HIVE-17297.patch

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