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http://issues.apache.org/jira/browse/POOL-94?page=comments#action_12460101 ] 
            
Sandy McArthur commented on POOL-94:
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I should have said that returning an object more than once per borrow is 
considered broken use of a pool. Your code shouldn't be using a borrowed object 
after it has been returned.

> GenericObjectPool allows checking in of previously checked in objects
> ---------------------------------------------------------------------
>
>                 Key: POOL-94
>                 URL: http://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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