Hello,

Thanks for your help.

The article with the C3PO helper threads is very interesting.

Mit besten Grüßen/with best regards
 
Matthias Schmitt





Am 22.08.16, 21:48 schrieb "Mark Eggers" <its_toas...@yahoo.com.INVALID>:

>Matthias,
>
>On 8/22/2016 8:32 AM, Matthias Schmitt wrote:
>> Hello everybody,
>> 
>> We have a Tomcat 7 and Axis 2 for our Java SOAP web service over
>> https on our Ubuntu server. We also use C3PO connection pooling (also
>> in other web services which is working fine). However, I´m not sure
>> if this is related to the topic.
>> 
>> The web service is working for about two/three days and after that
>> time period it´s not working anymore. Then our consuming customer
>> receives a Read Timeout Exception. After restarting the Tomcat
>> servlet everything is working fine again. Processing the request has
>> a duration of about 3 seconds. The Axis 2 has a default socket
>> timeout of 30 seconds. Our customer has a wait timeout of 60 seconds.
>> The strange thing about the problem is that it´s working for amount
>> of time and then the problem occurs. Even if we increase the client
>> timeout it seems like the request will be not processed. Also
>> increasing the socket timeout value in axis configuration does not
>> take effect. There is no exception message in the log that could help
>> us to reproduce the problem.
>> 
>> Thanks for your help,
>> 
>> Mit besten Grüßen/with best regards
>> 
>> Matthias Schmitt
>
>A thread dump when things are stuck would probably tell you a bit.
>
>That being said, I did a quick search on connection pooling
>implementations for Java, and found an interesting article:
>
>http://www.trustiv.co.uk/2014/06/battle-connection-pools
>
>It seems (at least in 2014) that if there are too few cp30 helper
>threads, you might end up with the behavior that you're seeing.
>
>It's just a thought. I have no experience with cp30 in this scenario.
>
>. . . just my two cents.
>/mde/
>


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