Eviction thread is able to remove (destroy) in-flight (borrowed) objects
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                 Key: POOL-151
                 URL: https://issues.apache.org/jira/browse/POOL-151
             Project: Commons Pool
          Issue Type: Bug
    Affects Versions: 1.5.3
            Reporter: Hassan Sajjad
            Priority: Blocker


Under high concurrent use, the eviction thread can temper with an in-use object 
from the pool, potentially causing catastrophic results, as illustrate in the 
below log from our use. Note the object - in our case JMSSession is closed 
in-flight (after message send but before commit), causing the commit to fail 
with {{javax.jms.IllegalStateException: MQJMS1024: session closed}} error.

{noformat}
2009-10-12 15:08:40,254 DEBUG [asyncDelivery59] Borrowed session 
com.ibm.mq.jms.mqqueuesess...@40bc88 for jms connector 
2009-10-12 15:08:40,341 DEBUG [Timer-0] Physically closing 
com.ibm.mq.jms.mqqueuesess...@40bc88 for connector 
2009-10-12 15:08:40,669 DEBUG [asyncDelivery59] Returning session 
com.ibm.mq.jms.mqqueuesess...@40bc88 for jms conn
ector
2009-10-12 15:08:40,433 ERROR [asyncDelivery59] Exception caught while 
committing transaction [com.ibm.mq.jms.mqqueuesess...@40bc88]
{noformat}


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