Zeke schrieb: > Hi: I have a JBOSS cluster which use Apache with mod_jk as HTTP load > balancer. In my cluster, some nodes are deployed web service, but not > all. For example, node 1 contains web servicebook_service, I can call > the web service using URL "http://www.node1.com/book_service";, but > node 2 does not contain it. I hope mod_jk can help me to detect > whether the requested web service exists. That is to say, if I call > the web service using "http://www.loadbalancer.com/book_service";, > mod_jk can know only node 1 contains the web service and node 2 not, > then the request will always be dispatched to node 1. But with my > current configuration on mod_jk and Apache, I fount that the request > can be dispatched to node 2. Then surely exception will be thrown, > since the web service not exists on node 2. Can mod_jk support it? Do > I need some specific configuration? Any suggestion from you will be > very appreciated!
If that would be an error situation and you want mod_jk to detect that, then look at fail_on_status in the documentation at: http://tomcat.apache.org/connectors-doc/reference/workers.html (and use negative codes). If this is how you regularly deploy your apps, you should thin twice, if the idea is good. You can: - use several load balancers, each with a different (maybe overlapping) set of balanced workers (e.g. one for book_service etc.). To get the stickyness right, you would then need to set the "route" attribute of the balancer embers. - use one load balancer and use mapping extensions to configure some nodes stopped for individual mounts. See http://tomcat.apache.org/connectors-doc/reference/uriworkermap.html#Rule%20extensions Regards, Rainer --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
