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From "Craig Tataryn" <>
Subject RE: [DBCP] - Tomcat 5
Date Tue, 24 Feb 2004 14:15:16 GMT

Craig W. Tataryn

>From: "Craig Tataryn" <>
>Reply-To: "Jakarta Commons Users List" <>
>Subject: [DBCP] - Tomcat 5
>Date: Mon, 23 Feb 2004 09:17:34 -0600
>Hi, I developed a webapp using Tomcat 4.1.29 with DBCP.  The client deploy 
>to Tomcat 5, and have been having connection problems.  We are running 
>against Sybase Adaptive Server Anywhere, and it appears that after the 
>application has been running for a while we just start getting "connection 
>refused" inside or outside our application whenever we try to get a 
>connection to the DB.
>I was wondering, I noticed that Tomcat 5.0 ships with the DBCP jar, because 
>I was developing using 4.1.29, I had to place that jar in my WEB-INF/lib.  
>Would this cause a problem, is it possible my webapp is using Tomcat's DBCP 
>instance to handle the connection pool, and thus when I reload my webapp, 
>the previous instance of the webapp's connecitons are just being zombied?
>What is the default number of connections that DBCP will try to secure?  
>I'm thinking that perhaps the pool is trying to grab more connections than 
>we have licenses for.  Although you would think I would get an appropriate 
>error message coming back which states that the connection limit has been 
>In a webapp situation, how do you ensure your connection pool is destroyed 
>when your webapp is recycled or stopped?
>Any help/suggestions would be greatly appreciated.
>Craig W. Tataryn
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