RMI Registry Conflict in JBoss
If the engine is running as an RMI server (or has security enabled), then by default it will attempt to use the RMI registry port 1099. This causes a conflict with JBoss, which also starts an RMI registry on port 1099. It is important for Flux to use a different registry port than the one used by JBoss.
To change the port that Flux uses, set the REGISTRY_PORT configuration option. For example, you can start Flux using port 1199 instead by setting: