Subru Krishnan created YARN-3969:

             Summary: Allow jobs to be submitted to reservation that is active 
but does not have any allocations
                 Key: YARN-3969
             Project: Hadoop YARN
          Issue Type: Sub-task
            Reporter: Subru Krishnan
            Assignee: Subru Krishnan

YARN-1051 introduces the notion of reserving resources prior to job submission. 
A reservation is active from its arrival time to deadline but in the interim 
there can be instances of time when it does not have any resources allocated. 
We reject jobs that are submitted when the reservation allocation is zero. 
Instead we should accept & queue the jobs till the resources become available.

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