Prabhu Joseph created YARN-4256:

             Summary: YARN fair scheduler vcores with decimal values
                 Key: YARN-4256
             Project: Hadoop YARN
          Issue Type: Bug
          Components: fairscheduler
    Affects Versions: 2.7.1
            Reporter: Prabhu Joseph
            Priority: Critical
             Fix For: 2.7.2

When the queue with vcores is in decimal value, the value after the decimal 
point is taken as vcores by FairScheduler.

For the below queue,

        <minResources>20000 mb,20 vcores,20.25 disks</minResources>
        <maxResources>30000 mb,40.2 vcores,30.25 disks</maxResources>

When many applications submitted  parallely into queue, all were in PENDING 
state as the vcores is taken as 2 skipping the value 40.

The code to Pattern match the vcores has to be 
improved in such a way either throw AllocationConfigurationException("Missing 
resource") or consider the value before decimal.

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