When I try to use JMX to monitor an application like this:
java -Dcom.sun.management.jmxremote.port=9999 \\ -Dcom.sun.management.jmxremote.authenticate=fals
Make sure the user you are using to run the java process have access to the file (owner/read permissions).
Try:
chmod 600 jmxremote.password
Plus I suggest you'll make your own password file and run it with
-Dcom.sun.management.jmxremote.password.file=pwFilePath
All explained here.