There seems to be race condition between PoolFiller and CapacityFiller which results in wrong pool statistics

I think what happens is:

• Both add connections to pool in different threads
• PoolFiller creates connection, then checks pools size and because pool has already certain size, it doesn't add connection and instead it destroys connection which increases destroyedCount

see SemaphoreConcurrentLinkedDequeManagedConnectionPool.java#L1163