Hi, I've tried to play AS7 with clustering mode and seems failed on last step. Here's what I did: 1. Prepare two hosts: one is 'master' (10.0.2.3), the other one is 'slave' (10.0.2.2) 2. 'master' is domain controller 3. deploy a 'hello-world' web app into domain. The project is extremely simple: just a index.jsp and web.xml. In web.xml there is a <distributable/>. 4. The contents in index.jsp: <% System.out.println( "Evaluating date now" ); java.util.Date date = new java.util.Date(); %> 5. Start two hosts, the domain seems run correctly, and the web-app is deployed correctly in domain. From log from both 'master' and 'slave', they are all fine: slave log: [Server:server-three-slave] 12:25:18,673 INFO [stdout] (MSC service thread 1-2) GMS: address=server-three-slave/web, cluster=web, physical address=10.0.2.2:55450 master log: [Server:server-three] 12:25:12,885 INFO [stdout] (MSC service thread 1-1) GMS: address=server-three/web, cluster=web, physical address=10.0.2.3:55450 6. Start apache httpd with mod_cluster setup, and seeing from the log everything is fine: httpd log: [Wed Jan 18 12:13:25 2012] [notice] Digest: done [Wed Jan 18 12:13:25 2012] [notice] Advertise initialized for process 11716 [Wed Jan 18 12:13:25 2012] [notice] Apache/2.2.15 (Unix) DAV/2 mod_cluster/1.1.x configured -- resuming normal operations master log: [Server:server-three] 12:25:21,339 INFO [org.jboss.modcluster.ModClusterService] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Engine [jboss.web] will use jvmRoute: b5c2598e-49fb-3c4b-996c-f3451747f44a 7. the httpd is run on 10.0.2.3 8. try to access cluster from http://10.0.2.3/demo, it redirects me to: http://10.0.2.3:8330/demo, and I could see the 'hello world' projects page. Seems everything is fine, domain works, cluster works, and web project in jboss domain can be accessed correctly via mod_cluster. BUT here is the problem: There's some communication problem between mod_cluster on 'master' (10.0.2.3) and the host on 'slave' (10.0.2.2), if the jboss host on 'slave' is run and registered into domain controller, mod_cluster begins to throw error: % tail -f /etc/httpd/logs/error_log [Wed Jan 18 01:21:59 2012] [error] (111)Connection refused: proxy: http: attempt to connect to 127.0.0.1:8330 (localhost) failed [Wed Jan 18 01:21:59 2012] [error] ap_proxy_connect_backend disabling worker for (localhost) [Wed Jan 18 01:22:00 2012] [error] proxy: http: disabled connection for (localhost) So the result becomes that only 'master' is serving the request from http://10.0.2.3/demo This could be seen when we access the index.jsp in demo project, because in jsp we have: <% System.out.println( "Evaluating date now" ); java.util.Date date = new java.util.Date(); %> We can only see the log output in 'master': [Server:server-three] 12:15:33,041 INFO [stdout] (http--10.0.2.3-9138-1) Evaluating date now And I've tried to use multiple web browsers / different computers to access the cluster, all I can see is that only 'master' is serving the requests, 'slave' is idle all the time. I'm using jboss-as-7.1.0.CR1b in my environment (there are bugs in previous version in infinispan/as7 integration on clustering). And I'm using mod_cluster-1.1.3.Final-linux2-x86-so.tar.gz for httpd part. And here's my mod_cluster conf: Listen 10.0.2.3:6666 <VirtualHost 10.0.2.3:6666> <Directory /> Order deny,allow Deny from all Allow from 10.0.2. </Directory> KeepAliveTimeout 60 MaxKeepAliveRequests 0 ManagerBalancerName other-server-group AdvertiseFrequency 5 </VirtualHost> I can ensure that domain are set correctly. So I believe the problem should be in mod_cluster/as7 integration part. But I cannot find what I'm doing wrong on my configurations, can anyone help? Cheers, - Weinan Li JBoss, Redhat