When tool tips pop up hovering over buttons

[David Peters]

Uncaught Exception detected.

Configuration:
JHelioviewer - Version: 2.2.1
JHelioviewer - Revision: 477
Java Virtual Machine - Name: OpenJDK 64-Bit Server VM
Java Virtual Machine - Vendor: Sun Microsystems Inc.
Java Virtual Machine - Version: 20.0-b12
JRE Specification - Version: 1.6
Operating System - Name: Linux
Operating System - Architecture: amd64
Operating System - Version: 3.8.0-35-generic

Date: Sun Jan 05 18:03:27 GMT 2014
Thread: Thread[AWT-EventQueue-1,6,main]
Message: null

Stacktrace:
java.lang.NullPointerException
at javax.swing.SwingUtilities.getWindowAncestor(SwingUtilities.java:137)
at javax.swing.SwingUtilities.windowForComponent(SwingUtilities.java:455)
at javax.swing.ToolTipManager.showTipWindow(ToolTipManager.java:309)
at javax.swing.ToolTipManager$insideTimerAction.actionPerformed(ToolTipManager.java:629)
at javax.swing.Timer.fireActionPerformed(Timer.java:313)
at javax.swing.Timer$DoPostEvent.run(Timer.java:244)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:226)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:673)
at java.awt.EventQueue.access$300(EventQueue.java:96)
at java.awt.EventQueue$2.run(EventQueue.java:634)
at java.awt.EventQueue$2.run(EventQueue.java:632)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:108)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:643)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:275)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:200)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:190)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:185)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:177)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:138)

[Bram Bourgoignie (bram-bourgoignie)]

I think this is a Open JDK related bug.

It was known in java 1.4.2. See https://netbeans.org/bugzilla/show_bug.cgi?id=37814 and in there http://bugs.java.com/bugdatabase/view_bug.do?bug_id=4910211

I assume OpenJDK didn't took over the patches yet.

Using the Oracle JDK may fix the issue.