JMX MBeanServerDelegate listener registration

Question

I'm trying to register a listener with the MBeanServerDelegate in SAP
Netweaver. I'm always getting back a NPE when I call addNotificationListener
on the connection:
java.lang.NullPointerException
        at
com.sap.engine.services.jmx.MBeanServerConnectionImpl.addNotificationListene
r(MBeanServerConnectionImpl.java:730)
        at
com.intersperse.agent.sapconnector.TestMBeanServerDelegate.main(TestMBeanSer
verDelegate.java:50)
It seems to apply to any MBean that I try as well, not just
MBeanServerDelegate. I have a very simple test:
Properties env = new Properties();
env.setProperty(Context.INITIAL_CONTEXT_FACTORY,
"com.sap.engine.services.jndi.InitialContextFactoryImpl");
env.setProperty(Context.SECURITY_PRINCIPAL, "Administrator");
env.setProperty(Context.SECURITY_CREDENTIALS, "control");
env.setProperty(Context.PROVIDER_URL, "10.70.20.136:50004");
MBeanServerConnection serverConnection =
JmxConnectionFactory.getMBeanServerConnection(JmxConnectionFactory.PROTOCOL_
ENGINE_P4, env);
serverConnection.addNotificationListener(new
ObjectName("JMImplementation:type=MBeanServerDelegate"),
        new NotificationListener() {
                public void handleNotification(Notification notification,
Object handback) {
                        System.out.println("handle note: " + notification);
        }, null, null);
Anyone know what could be causing this?

Answer 1

Hi Andrew,
We are using JManage open soure and enhancing it to support SAP WAS.
Thanks,
Siva