Redirecting requests to a different tomcat

Hi,
I have two tomcat 5 installations running in my server. I have enabled the load-balancing feature of tomcat via apache.
The load-balancing and failover is working fine for me to redirect requests for all the webapps under a tomcat. Can this be done for a single webapp alone ?
What i mean to say is if I go to the tomcat1 manager UI and stop one of the webapps, then the requests for that webapp should alone be served from tomcat2 ...
Please get back if iam not clear

no experience with tomcat 5 laodbalancing, but if it really is enabled it should work when only 1 of the 2 is active.

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Screenshot by Lightshot
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