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From "Shapira, Yoav" <>
Subject RE: connection pool problems, etc.
Date Mon, 09 Aug 2004 13:02:04 GMT

Note that Tomcat 5.0.27 already ships with DBCP 1.2.1.  As for database
drivers, your advice is good in general (and has nothing specifically to
do with Tomcat or DBCP) and people should follow it.

Yoav Shapira
Millennium Research Informatics

>-----Original Message-----
>From: Steve Summit []
>Sent: Friday, August 06, 2004 8:20 PM
>Subject: connection pool problems, etc.
>It looks like lots of people are having various kinds of problems
>involving pools, and threads, and connections (perhaps to databases),
>and starvation, and hanging, and such.  (In fact, it was to ask
>about just such a problem that I joined this list.)  I don't have
>all the information yet, but I've discovered that my problems
>were probably due to -- or at least seem to have been fixed by
>updating -- a couple of .jar files:
>  * The Jakarta common classes commons-dbcp.jar and commons-pool.jar
>  * The Oracle JDBC driver classes12.jar or ojdbc14.jar
>As I understand it, both Jakarta and Oracle have recently had
>to fix bugs in these classes which involved pools, and threads,
>and connections, and starvation, and hanging, and such.
>The new versions of the Jakarta classes are
>commons-dbcp-1.2.1.jar and commons-pool-1.2.jar, and I
>downloaded them from
>The new versions of the Oracle JDBC drivers come with newer
>versions of Oracle, or can (so my dba tells me) be downloaded
>from Oracle's site.
>(Apologies if this is old news to everyone.)
>					Steve Summit
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