Mailing-List: contact dev-help@tomcat.apache.org; run by ezmlm
Precedence: bulk
Reply-To: "Tomcat Developers List" <dev@tomcat.apache.org>
Received-SPF: pass (nike.apache.org: local policy)
Message-ID: <4AA13209.4050504@hanik.com>
Date: Fri, 04 Sep 2009 09:28:09 -0600
From: Filip Hanik - Dev Lists <devlists@hanik.com>
User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US;
 rv:1.9.1.1) Gecko/20090814 Fedora/3.0-2.6.b3.fc11 Lightning/1.0pre
 Thunderbird/3.0b3
MIME-Version: 1.0
To: Tomcat Developers List <dev@tomcat.apache.org>
Subject: Re: FW: dbcp pool evictor deadlock?
References: <62F2E2A8D98D7A4BB77C440D56AAAFE014B1AD@us-bos-mx023.na.pxl.int>
 <6a79aa8f0909040728o310c0813kb5b95e3776927ce9@mail.gmail.com>
In-Reply-To: <6a79aa8f0909040728o310c0813kb5b95e3776927ce9@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit

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.<ebenze@hotmail.com>
>> Date: Tue, Jun 23, 2009 at 10:13 AM
>> Subject: Re: dbcp pool evictor deadlock?
>> To: dev@tomcat.apache.org
>>
>>
>> "Mark Thomas"<markt@apache.org>  wrote in message
>> news:4A40E12C.2070504@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
>>
>>
>>
>>
>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: dev-unsubscribe@tomcat.apache.org
>> For additional commands, e-mail: dev-help@tomcat.apache.org
>>
>>
>>
>>      
>    


---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscribe@tomcat.apache.org
For additional commands, e-mail: dev-help@tomcat.apache.org