To enable JMX for some java process, the following option is required.
-Dcom.sun.management.jmxremote
-Dcom.sun.management.jmxremote.authenticate=false
-Dcom.sun.management.jmxremote.ssl=false
-Dcom.sun.management.jmxremote.port=9099
-Dcom.sun.management.jmxremote.rmi.port=9199
The important two ports are com.sun.management.jmxremote.port and com.sun.management.jmxremote.rmi.port. If JMX client is connecting through firewall, the two ports must be opened.