When running without a bind address, the app server defaults to localhost. This means that if you run without a bind address, you can only hit the console using http://localhost:8080/jmx-console/ . In 4.0.x, the default was 0.0.0.0 which made the console available from the ipaddress assigned. In the log, you can see that running with no bind address binds to 0.0.0.0 in 4.0.5
12:00:36,903 INFO [Http11BaseProtocol] Starting Coyote HTTP/1.1 on http-0.0.0.0-8080

On 4.2 it binds to localhost only.
12:08:30,236 INFO [Http11Protocol] Starting Coyote HTTP/1.1 on http-127.0.0.1-8080