jboss.as:management-root=server not found using queryNames()

[cfrantsen]

I am using queryNames() to try and find the jboss.as:management-root=server mBean but nothing is returned, all other methods I have tried finds the mBean. WildFly 10.0 was used during my tests. See below for some test code that shows the problem. Any ideas as to why this happens?

import java.util.Set;
import java.util.Objects;
import javax.management.MBeanServerConnection;
import javax.management.remote.JMXConnector;
import javax.management.remote.JMXConnectorFactory;
import javax.management.remote.JMXServiceURL;
import javax.management.*;


public class test {
    public static void main(String[] args) throws Exception {
        JMXServiceURL address = new JMXServiceURL("service:jmx:remote+http://localhost:9990");
        JMXConnector connector = JMXConnectorFactory.connect(address, null);
        MBeanServerConnection connection = connector.getMBeanServerConnection();

        ObjectName bean = new ObjectName("jboss.as:management-root=server");

        System.out.println("getMBeanInfo()");
        System.out.println(connection.getMBeanInfo(bean).getAttributes());

        System.out.println("queryNames(ObjectName, null)");
        System.out.println(connection.queryNames(bean, null));

        System.out.println("queryMBeans(ObjectName, null)");
        System.out.println(connection.queryMBeans(bean, null));

        System.out.println("queryNames(null, null)");
        Set<ObjectName> o = connection.queryNames(null, null);
        for (ObjectName name : o) {
            if (Objects.equals(name.toString(), bean.toString())) {
                System.out.println(name);
            }
        }
    }
}

Test run

$ java -cp .:/opt/wildfly/bin/client/jboss-client.jar test
Oct 22, 2016 6:55:14 PM org.xnio.Xnio <clinit>
INFO: XNIO version 3.3.4.Final
Oct 22, 2016 6:55:14 PM org.xnio.nio.NioXnio <clinit>
INFO: XNIO NIO Implementation Version 3.3.4.Final
Oct 22, 2016 6:55:14 PM org.jboss.remoting3.EndpointImpl <clinit>
INFO: JBoss Remoting version 4.0.18.Final
getMBeanInfo()
[Ljavax.management.MBeanAttributeInfo;@42d80b78
queryNames(ObjectName, null)
[]
queryMBeans(ObjectName, null)
[org.jboss.as.controller.ModelController[jboss.as:management-root=server]]
queryNames(null, null)
jboss.as:management-root=server

[mayerw01]

It should work if you change the code as follows:

Add

ObjectName search = new ObjectName("jboss.as:*");

Change

  System.out.println(connection.queryNames(bean, null)); 

To:

System.out.println(connection.queryNames(search, bean)); 

[cfrantsen]

Changing the code works but seems alot slower. Why doesn't the version i posted find the MBean, is this particular MBean special in some way?

This is the only MBean I have found so far with this behavior, for example java.lang:type=Runtime etc works with queryNames(ObjectName, null).