The exception below is thrown when clicking on a UserData cell which is not expandable in the MBeans notification buffer.

Exception in thread "AWT-EventQueue-0" java.lang.ClassCastException: sun.tools.jconsole.inspector.XMBeanNotifications cannot be cast to sun.tools.jconsole.inspector.XTable
        at sun.tools.jconsole.inspector.XTextFieldEditor.getTableCellEditorComponent(XTextFieldEditor.java:112)
        at sun.tools.jconsole.inspector.XMBeanNotifications$UserDataCellEditor.getTableCellEditorComponent(XMBeanNotifications.java:515)
        at javax.swing.JTable.prepareEditor(JTable.java:5781)
        at javax.swing.JTable.editCellAt(JTable.java:3492)
        at javax.swing.plaf.basic.BasicTableUI$Handler.adjustSelection(BasicTableUI.java:1084)
        at javax.swing.plaf.basic.BasicTableUI$Handler.mousePressed(BasicTableUI.java:1014)
        at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:222)
        at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:221)
        at java.awt.Component.processMouseEvent(Component.java:5996)
        at javax.swing.JComponent.processMouseEvent(JComponent.java:3203)
        at java.awt.Component.processEvent(Component.java:5764)
        at java.awt.Container.processEvent(Container.java:1984)
        at java.awt.Component.dispatchEventImpl(Component.java:4407)
        at java.awt.Container.dispatchEventImpl(Container.java:2042)
        at java.awt.Component.dispatchEvent(Component.java:4237)
        at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4248)
        at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3909)
        at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3842)
        at java.awt.Container.dispatchEventImpl(Container.java:2028)
        at java.awt.Window.dispatchEventImpl(Window.java:2300)
        at java.awt.Component.dispatchEvent(Component.java:4237)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)