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https://issues.apache.org/jira/browse/YARN-4888?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15402970#comment-15402970
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Wangda Tan commented on YARN-4888:
----------------------------------

Thanks [~subru],

Some comments:

1) SchedulerRequestKey.UNDEFINED is not used by anybody, can be removed?
2) Changes of FiCaSchedulerApp can be removed, because in 
RegularContainerAllocator, schedulerKey is already updated
3) SchedulerRequestKey.compareTo:
   bq. return (int) (allocationRequestId - o.getAllocationRequestId());
   could lead to a number becomes negative if result > Integer.max_value, 
instead you should use Long.compare(...) 
4) It looks like there're some duplicated code for tests, could we add a new 
parameterized test (such as TestSchedulingWithAllocationId) and test both 
scheduler? 

> Changes in RM container allocation for identifying resource-requests 
> explicitly
> -------------------------------------------------------------------------------
>
>                 Key: YARN-4888
>                 URL: https://issues.apache.org/jira/browse/YARN-4888
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: resourcemanager
>            Reporter: Subru Krishnan
>            Assignee: Subru Krishnan
>         Attachments: YARN-4888-WIP.patch, YARN-4888-v0.patch, 
> YARN-4888-v2.patch, YARN-4888-v3.patch, YARN-4888-v4.patch, 
> YARN-4888-v5.patch, YARN-4888.001.patch
>
>
> YARN-4879 puts forward the notion of identifying allocate requests 
> explicitly. This JIRA is to track the changes in RM app scheduling data 
> structures to accomplish it. Please refer to the design doc in the parent 
> JIRA for details.



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