Splitting ROOT context application to separate nodes with mod_cluster

Issue

• We have a ROOT context application along with other non-ROOT context applications( such as /test). We want to proxy them with mod_cluster through the same host name on httpd. The ROOT context needs to be proxied to a different cluster of JBoss; how can we ensure ROOT goes to one cluster and other apps go to another?
• We have 4 applications deployed in the domain mode with mod_cluster as frontend to JBoss.We need to route requests to specific JVM based on what server-group the application is targeted to.The mod_cluster uses same VirtualHost for all application requests.