http://people.apache.org/~fhanik/jdbc-pool/v1.0.7.1/
Filip
On 09/04/2009 08:28 AM, Narendra Sarkar wrote:
Hi,
I would like to download jdbc-pool library. However, I am unable to find the
library in jakarata.apache.org.
Can anybody tell me where from I can download this file?
Regards,
Narendra
---------- Forwarded message ----------
From: Eric B.<ebe...@hotmail.com>
Date: Tue, Jun 23, 2009 at 10:13 AM
Subject: Re: dbcp pool evictor deadlock?
To: dev@tomcat.apache.org
"Mark Thomas"<ma...@apache.org> wrote in message
news:4a40e12c.2070...@apache.org...
Narendra Sarkar wrote:
Hi,
We have a multi threaded environment. We have noticed that thread blocks
for
10 to 20 minutes due DBCP getConnection method call. Then, we
investigated
the source code of DBCP(commons-dbcp-1.2.1-PII.jar) and noticed that
createConnection method is synchronized. This problem occur more
frequently
when we have lower value of MaxIdleConnection parameter. After
increasing
the value of MaxIdleConnection parameter, frequency of blocking get
reduced.
We then replaced DBCP connection pooling with Oracle Connection pooling
(ojdbc14.jar) and never encountered blocking issue.
I think the issue is with that createConnection method of DBCP
synchronization. We have taken Thread dump to do above analysis.
Yep, known issues with commons-pool. Should be fixed in 1.5.1. Trunk has
been updated. Proposed for 6.0.x and 5.5.x. Alternatively, there is the
new JDBC pool module.
I'm a little confused now. Filip pointed me to the jdbp-1.0.5 package.
Is
that just repackaged versions of dbcp 1.2.2/pool 1.5? If not, what
versions
of dbcp/pool are contained within there?
If the fix in commons-pool is in 1.5.1, am I still expecting concurrency
problems if upgrading 1.5? What would be the best move?
Thanks,
Eric
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