Konstantinos Karanasos commented on YARN-4335:

Thank you for the feedback, [~leftnoteasy].

I addressed your first two comments and will now upload a new version of the 

bq. Javadocs of ExecutionType: if we use ExecutionType for resource request, I 
would suggest to add description that scheduler could use it to decide if idle 
resources could be used by the resource request.
Just double-checking: do you mean adding an additional description in the 
javadoc of the ExecutionType?
Let me know and I will go ahead and update the patch.

> Allow ResourceRequests to specify ExecutionType of a request ask
> ----------------------------------------------------------------
>                 Key: YARN-4335
>                 URL: https://issues.apache.org/jira/browse/YARN-4335
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: nodemanager, resourcemanager
>            Reporter: Konstantinos Karanasos
>            Assignee: Konstantinos Karanasos
>         Attachments: YARN-4335-yarn-2877.001.patch
> YARN-2882 introduced container types that are internal (not user-facing) and 
> are used by the ContainerManager during execution at the NM.
> With this JIRA we are introducing (user-facing) resource request types that 
> are used by the AM to specify the type of the ResourceRequest.
> We will initially support two resource request types: CONSERVATIVE and 
> CONSERVATIVE resource requests will be handed internally to containers of 
> GUARANTEED type, whereas OPTIMISTIC resource requests will be handed to 
> QUEUEABLE containers.

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