Tomcat JMX Monitoring

Monitoring Tomcat's resources could be done using the JConsole app which already included in the JDK. In order to monitor Tomcat, we also need to prepare the Tomcat first.

To configure Tomcat in *nix environment, you need to add the parameter below when starting tomcat:

-Dcom.sun.management.jmxremote
  -Dcom.sun.management.jmxremote.port=%my.jmx.port%
  -Dcom.sun.management.jmxremote.ssl=false
  -Dcom.sun.management.jmxremote.authenticate=false

To add the configuration above, one of the way is as below:
1. Open your catalina.sh
2. Add below line (example port is 12300)

3. Restart your tomcat
4. If you need to access it from other computers, make sure the firewall configuration  allows the configured port to be accessed from outside
5. In case the remote connection is not working, try to add below line in the configuration
    -Dcom.sun.management.jmxremote.host=localhost


Reference:
- https://tomcat.apache.org/tomcat-7.0-doc/monitoring.html
- http://docs.oracle.com/javase/6/docs/technotes/guides/management/jconsole.html