There is no additional modules require to load balance jboss.
But we had some old services require it and we down to road for mod_proxy_ajp.
alternatively you can choose mod_cluster.

LoadModule proxy_ajp_module modules/mod_proxy_ajp.so
 
#
# When loaded, the mod_proxy_ajp module adds support for
# proxying to an AJP/1.3 backend server (such as Tomcat).
# To proxy to an AJP backend, use the "ajp://" URI scheme;
# Tomcat is configured to listen on port 8009 for AJP requests
# by default.
#
 
# 
# Uncomment the following lines to serve the ROOT webapp
# under the /tomcat/ location, and the jsp-examples webapp
# under the /examples/ location.
#
#ProxyPass /tomcat/ ajp://localhost:8009/
#ProxyPass /examples/ ajp://localhost:8009/jsp-examples/
 
 
<VirtualHost 10.0.1.5:80>
ServerName linux4
<Proxy balancer://cluster>
Order deny,allow
Allow from all
 
BalancerMember ajp://localhost:8009/Untitled1 route=node1
BalancerMember ajp://localhost:8010/Untitled1 route=node2
 
 
ProxySet maxattempts=1
ProxySet stickysession=JSESSIONID
ProxySet timeout=300
</Proxy>
ProxyIOBufferSize 19000
LimitRequestFieldsize 18000
ProxyTimeout 300
ProxyStatus Full
 
ProxyPass /Untitled1 balancer://cluster/
#ProxyPassReverse /Untitled1 http://linux4/Untitled1
 
<Location /balancer-manager>
SetHandler balancer-manager
Order Deny,Allow
Deny from all
Allow from localhost
Allow from 10.0.0.0/4
</Location>
 
</VirtualHost>