Sun WebServer 7.0/jBoss 4.2.2 http connectors unresponsive

[gotthejack]

We have a Sun Webserver 7.0 front end connecting with multiple jBoss 4.4.2 servers using http connector. Throughout the day we receive multiple offline errors from the Sun Webserver stating that one of the servers in unresponsive. During these times the number of connections are under 30 and the jBoss servers are not overburdened.

From our Sun Webserver logs:
[24/Jul/2008:07:17:27] fine (17169): for host 67.99.63.186 trying to POST /matter/billing/LegalBillSubmit.serv, attempting to connect to 10.10.15.21:8080
[24/Jul/2008:07:21:11] fine (17169): for host 67.99.63.186 trying to POST /matter/billing/LegalBillSubmit.serv, error connecting to 10.10.15.21:8080 (IO time
out error)

We have increased the client connect-timeout in the Sun Webserver and it has not made any difference. We are wondering is there any way to diagnose http connector issues in jBoss? Is this a question for tomcat? Any way to debug log the connectors to see what is occurring? This is only happening in our production environment.

Any advice would be helpful.

[erasmomarciano]

It seems there's a timeout exception connecting to 10.10.15.21 on port 8080 when excecuitng HTTP POST on URI /matter/billing/LegalBillSubmit.serv.

HTTP POST method is often used on form submit.

May be it's a socket timeout on Sun Webserver or on the remote site 10.10.15.21.

Any error on the remote site logs?

[gotthejack]

The jBoss logs on 10.10.15.21 show no activity for this request. That is why we would like to know how to turn on logging for http connector.

[erasmomarciano]

you could see this topic

http://www.jboss.com/index.html?module=bb&op=viewtopic&t=135162

[gotthejack]

Thanks, but I don't know how that topic has any relation to what we would like to do? We just want to log the activity of the http connector, not prevent access to a server or app.

[gotthejack]

Further update:
We snooped both the web server and the middle tiers and found that the web server is sending a SYN packet which is received on the middle tier but never ACKnowledged. So far we have only seen this on posts, but we are still examining the logs. I thought the operating system is responsible for the SYN,ACK back to the web server. Or does the operating system check to see if there is any listener and the sends the SYN,ACK? Trying to figure out if we are looking at an error at the operating level or with tomcat/jasper?