posted 20 years ago
JBoss doesn't seem to have the concept of an admin server -- at least not in the 3.x releases. You can cluster the servers for high availability and session replication but each server is a peer just like any other.
If you take a look at the jmx-console/cluster application that is deployed by default (in the clustered configuration) you'll see it auto-discovers all nodes in the cluster. So, you could potentially bring up a cluster with three nodes and only send traffic to two of them, keeping the third online to act like an admin server.