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Scheduler question
Do the Hadoop 2.0 YARN scheduler(s) deal with situations like the following?
Hadoop cluster of 10 nodes, with 8GB each available for containers.  There is only one queue.
Application A requests 100 4GB containers.  It initially, or after a little while, gets 20 containers.
Later, application B requests 1 8GB container.
Suppose that App-A's containers each take a few minutes.  At some point one will complete.  When that happens, will the scheduler immediately allocate another 4GB container to App-A?  If so will App-B ever get its container until App-A is almost done?