Is it possible to enable remote jmx monitoring programmatically?

Question

I need to programmatically start a new java process and dynamically set the JMX port. So instead of doing this

-Djava.rmi.server.hostname=127.0.0.1 -Dcom.sun.management.jmxremote.port=9995 -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.authenticate=false

I would like to do the following

System.setProperty("java.rmi.server.hostname", "127.0.0.1" );
System.setProperty("com.sun.management.jmxremote", "true" );
System.setProperty("com.sun.management.jmxremote.authenticate", "false" );
System.setProperty("com.sun.management.jmxremote.ssl", "false" );
System.setProperty("com.sun.management.jmxremote.port", "9995"  );

but it doesn't work. Any idea why?

Kowal

IMHO its not possible. – Traduce

See this answer. You can still remotely monitor the JVM using Java Attach API if that is your goal. – Escuage

Can I have an accepted answer? – Arjun

Answer 1

By the time your code is called you've missed your chance to configure the jmxremote connector.

What you need to do is create your own rmi registry and a JMXConnectorServer to listen for rmi calls and pass them to the MBeanServer.

private void createJmxConnectorServer() throws IOException {
    LocateRegistry.createRegistry(1234);
    MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
    JMXServiceURL url = new JMXServiceURL("service:jmx:rmi://localhost/jndi/rmi://localhost:1234/jmxrmi");
    JMXConnectorServer svr = JMXConnectorServerFactory.newJMXConnectorServer(url, null, mbs);
    svr.start();
}

Arjun

Great to know I've helped :) – Arjun

careful, this will accept any password unless you do HashMap<String,Object> env = new HashMap<String,Object>(); env.put("jmx.remote.x.password.file", "path-to-password-file");, and pass that in when you create the JMXConnectorServer, where you currently have the null. Still, thanks so much for putting me on the right path!! – Bonner

I've not been able to programmatically assign a JMX authenticator. Is there a way to inject it instead of using system properties? – Gastronome