Out of curiosity, how does tomcat handle request routing across multiple instances/servers. In a traditional deployment the WOAdaptor apache module would take care of routing the request to the appropriate application instance, how does this work under a clustered tomcat deployment?

There is the traditional mod_jk which behaves a bit like the WO web adaptor. You define workers (tomcat instances) and must take care of that "sticky_sessions" work.

see:

http://tomcat.apache.org/connectors-doc/generic_howto/workers.html

and

http://tomcat.apache.org/connectors-doc/reference/workers.html

If you want to have a "farm" (and I don't know if it is possible to achieve with WO):

http://tomcat.apache.org/tomcat-5.5-doc/cluster-howto.html

As far as I understand it requires session persistance across the whole cluster. Perhaps it is possible to configure that without it, otherwise WO will suck. It's useful for a J2EE based architecture where your EJB can be anywhere.

Oliver

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