I am working on implementing a load balancing/failover solution for our applications using Apache httpd (v 2.2.16) and Jboss 4.2.1. I have configured apache and jboss as described in the following link: http://community.jboss.org/wiki/UsingModproxyWithJBoss
However, I can see that the application is not load balancing across 2 nodes. Please find httpd.conf cluster config is as follows:
# Note: The following must must be present to support
# starting without SSL on platforms with no /dev/random equivalent
# but a statically compiled-in mod_ssl.
SetEnv force-proxy-request-1.0 1
SetEnv proxy-nokeepalive 1
Allow from all
BalancerMember https://myurl/JPBC route=node1
BalancerMember https://myurl/JPBC route=node2
ProxyPass /JPBC/ balancer://my_cluster/ stickysession=JSESSIONID|jsessionid nofailover=Off
ProxyPassReverse /JPBC/ balancer://my_cluster/
The reason I am using the same url in the proxy balancer is that it is being used as a redirect url which is sent back to the clients browser so the client can punchout with the correct url. If I use an ip:port then the client wont be able to access our punchout site.
I have modified the server.xml on both Jboss nodes to include <Engine name="jboss.web" defaultHost="localhost" jvmRoute="node1"> for node 1 and <Engine name="jboss.web" defaultHost="localhost" jvmRoute="node2"> for node 2.
I have also modified jboss-service.xml to include <attribute name="UseJK">true</attribute>
The host file has the url mapped to both ip address on both nodes, node 1 is the first mapping so all requests go to node 1 hence why I dont see any load balancing.
If I change node 2 hosts file so node 2 is the first mapping then requests do get redirected to node 2 but the application shows timeout errors and other problems occur due to the session not sticking to node 2. I can see that the JSESSIONID content value is changing from XXX.node1 to XXX.node2 and vice versa.
I am not sure why sessions are not sticking using the jvmroute configuration. I would be grateful for any help in solving this problem.