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https://issues.apache.org/jira/browse/POOL-151?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12775033#action_12775033
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Hassan Sajjad commented on POOL-151:
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I have created a simple test case that only exercise Commons-pooling library -
all other dependencies such as the My App, and JMS are removed.
I have *not* been able to reproduce the issue.
Imagine our app has the tendency of returning the same object twice under high
load (1 in 100k messages). Any possible suggestion on how to stop it in the
pooling layer?
Is there a specific reason for preferring List over Set for pool's data
structure?
> Eviction thread is able to remove (destroy) in-flight (borrowed) objects
> ------------------------------------------------------------------------
>
> 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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