Why JConsole cannot connect to JBoss EAP 6 when using a port offset ?

Issue

• Why JBoss fails to connect JBoss EAP 6 using the script jconsole.bat:

        Exception in thread "AWT-EventQueue-0" java.lang.RuntimeException: Error connecting to JBoss AS.
            at org.jboss.as.cli.gui.JConsoleCLIPlugin.getTabs(JConsoleCLIPlugin.java:80)
            at sun.tools.jconsole.VMPanel.createPluginTabs(VMPanel.java:641)
            at sun.tools.jconsole.VMPanel.propertyChange(VMPanel.java:315)
            at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:339)
            at javax.swing.event.SwingPropertyChangeSupport.firePropertyChange(SwingPropertyChangeSupport.java:75)
            at javax.swing.event.SwingPropertyChangeSupport$1.run(SwingPropertyChangeSupport.java:80)
            at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
            at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:641)
            at java.awt.EventQueue.access$000(EventQueue.java:84)
            at java.awt.EventQueue$1.run(EventQueue.java:602)
            at java.awt.EventQueue$1.run(EventQueue.java:600)
            at java.security.AccessController.doPrivileged(Native Method)
            at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
            at java.awt.EventQueue.dispatchEvent(EventQueue.java:611)
            at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
            at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
            at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
            at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
            at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
            at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
        Caused by: java.lang.NullPointerException
            at org.jboss.as.cli.gui.JConsoleCLIPlugin.connectCommandContext(JConsoleCLIPlugin.java:109)
            at org.jboss.as.cli.gui.JConsoleCLIPlugin.getTabs(JConsoleCLIPlugin.java:77)
            ... 19 more

• JConsole displays the above error when connecting to a Local Process when using a port-offset.
• JConsole displays the above error when connecting directly to a JBoss EAP JVM in domain mode as a Local Process.