Paul has helped to answer this question:
In "standalone/deployments/mod_cluster.sar/META-INF/mod_cluster-jboss-beans.xml" it has:
Is the "org.jboss.modcluster.ha.HAModClusterServiceMBean.class" used in AS7?
No - it is not. The jboss-ha-server module on which it depends does not
exist in AS7.
I saw this "org.jboss.modcluster.ha.HAModClusterServiceMBean.java" has been removed since 1.2.6.Final, does that mean the 'clustered mode' is already deprecated?
Correct. We removed this for a couple of reasons.
* It depends on code from AS5/6 that was deprecated in AS7.
* It added a lot of complexity without much added value
* The biggest benefit, i.e. the execution of manageement operations to
an entire load balancing group, can be implemented via AS7 management
operations on the domain controller.
Does mod_cluster talk with every node in AS7 cluster or it just communicate with the domain controller?
A: Each node communicates with the load balancer.
Are their any differences when mod_cluster is working with standalone mode and domain mode?