Pavel Kolesov created POOL-340:
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Summary: borrowObject is stuck, if create fails
Key: POOL-340
URL: https://issues.apache.org/jira/browse/POOL-340
Project: Commons Pool
Issue Type: Bug
Affects Versions: 2.5.0, 2.4.3
Reporter: Pavel Kolesov
After changes in 2.4.3 there is a high chance of a scenario, in which
borrowObject waits infinitely, if create fails or no one calls a create.
{noformat}
java.lang.Thread.State: WAITING (parking) at sun.misc.Unsafe.park(Native
Method) - parking to wait for <0x0000000083cfd978> (a
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject) at
java.util.concurrent.locks.LockSupport.park(LockSupport.java:175) at
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
at
org.apache.commons.pool2.impl.LinkedBlockingDeque.takeFirst(LinkedBlockingDeque.java:583)
at
org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:442)
at
org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:363)
{noformat}
If pool is exhausted, when borrowObject tries to get idle object, it waits for
new object to be created.
If all objects are returned to pool invalid and destroyed, and it is impossible
to create a new one, borrowObject will not return.
Even if afterwards it is becomes possible to crate a new object but no one
creates it, borrowObject will not return either.
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