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https://issues.apache.org/jira/browse/POOL-94?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12490734
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Tim McCollough commented on POOL-94:
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I agree there are numerous bad things that happen if the code using the object
pool mis-behaves. It is my contention however, that the GenericObjectPool
should be implemented in such a way that prevents these mishaps from happening.
*OR* that adequate warning in the javadoc to inform the developer that the
implementation does *NOT* tolerate bad behaviour
> GenericObjectPool allows checking in of previously checked in objects
> ---------------------------------------------------------------------
>
> Key: POOL-94
> URL: https://issues.apache.org/jira/browse/POOL-94
> Project: Commons Pool
> Issue Type: New Feature
> Affects Versions: 1.3
> Environment: JDK 1.4.2, web application running under Tomcat 5.0.25
> Reporter: Tim McCollough
> Priority: Minor
>
> I am using GenericObjectPool to store a pool of socket connections. While
> debugging the application I noticed that the result of GetNumActive() was
> becoming more and more negative, while the GetNumIldle() count was ever
> increasing. Further debug showed that my application was returning the same
> connection more than once and the GenericObjectPool implementation accepted
> the return silently and decremented the active count and incremented the idle
> count.
> I don't object to GenericObjectPool allowing multiple returns on the same
> object, but the bookkeeping problem will lead to bad things happening in the
> pool management code.
> I am investigating what it would take to fix GenericObjectPool but since I am
> inexperienced in these commons projects I don't know what I should do from
> here.
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