Issue

• Trying to make a remote jconsole connection to JBoss running on Red Hat Enterprise Linux (RHEL) with X11 disabled results in the following error:

# ./jconsole.sh
/bin/readlink
CLASSPATH /jboss/jdk1.6.0_45/lib/jconsole.jar:/path/jdk1.6.0_45/lib/tools.jar:/jboss/eap-6.4/bin/client/jboss-cli-client.jar
Sep 17, 2015 11:35:51 AM org.xnio.Xnio <clinit>
INFO: XNIO Version 3.0.13.GA-redhat-1
Sep 17, 2015 11:35:51 AM org.xnio.nio.NioXnio <clinit>
INFO: XNIO NIO Implementation Version 3.0.13.GA-redhat-1
Sep 17, 2015 11:35:51 AM org.jboss.remoting3.EndpointImpl <clinit>
INFO: JBoss Remoting version 3.3.4.Final-redhat-1
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:672)
        at java.awt.EventQueue.access$400(EventQueue.java:81)
        at java.awt.EventQueue$2.run(EventQueue.java:633)
        at java.awt.EventQueue$2.run(EventQueue.java:631)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:642)
        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)