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From Rainer Jung <>
Subject Re: Apache / mod_jk / Jboss-tomcat weirdness
Date Fri, 08 Aug 2008 20:45:31 GMT schrieb:
> We're running a web environment using RHEL 4, Apache 2.0.52 with Worker
> MPM, mod_jk 1.2.20 and jboss/tomcat application servers (Jboss 4 / tomcat55).
> There's a firewall between our web and application servers, and I have
> read about mod_jk and firewalls (i.e. socket_keepalive = 1).
> A weird thing I see is that sometimes, the apache server status page
> displays requests/threads in the "W" (sending reply) state up to Apache
> timeout, while the Jboss Jk status shows no threads for that client in the
> "Service" state.

In addition to Mladen: "W" for apache usually means that it thinks it is 
working on a request/reponse. I would do a couple of "gstack" for the 
httpd processes and check, in which stack the processing threads are. 
Most interesting will be the frames near the top of each stack.



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