I just saw this in one of my load tests
[java] java.util.NoSuchElementException
[java] at java.util.LinkedList.remove(LinkedList.java:644)
[java] at java.util.LinkedList.removeFirst(LinkedList.java:134)
[java] at
org.apache.commons.pool.impl.GenericKeyedObjectPool.allocate(GenericKeyedObjectPool.java:1248)
[java] at
org.apache.commons.pool.impl.GenericKeyedObjectPool.borrowObject(GenericKeyedObjectPool.java:1091)
Looks to me like before entering the permit-dispensing block, we need to
make sure there are latches left to be served in the allocation queue.
IIRC what is going on, this should happen (so could be unit-tested)
when there are n threads waiting and m instances in one of the pools,
with n < = m < maxActive, so they all get served from the idle pool, but
there is still capacity to create.
Phil
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