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From "Hassan Sajjad (JIRA)" <j...@apache.org>
Subject [jira] Commented: (POOL-151) Eviction thread is able to remove (destroy) in-flight (borrowed) objects
Date Tue, 13 Oct 2009 16:13:31 GMT

    [ https://issues.apache.org/jira/browse/POOL-151?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12765130#action_12765130
] 

Hassan Sajjad commented on POOL-151:
------------------------------------

This behaviour is seen in 1.2, 1.4 and 1.5.3 versions of commons-pooling. I have upgraded
the versions in search of a fix, given various concurrency enhancements have been going in
in the previous releases. Unfortunately the issue is produced in all the existing versions.

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

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