FULL PRODUCT VERSION :
ava version "1.8.0-ea"
Java(TM) SE Runtime Environment (build 1.8.0-ea-b28)
Java HotSpot(TM) 64-Bit Server VM (build 24.0-b01, mixed mode)


ADDITIONAL OS VERSION INFORMATION :
Fedora 17: kernel 3.3.0-0.rc5.git3.1.fc17.x86_64

EXTRA RELEVANT SYSTEM CONFIGURATION :
Gnome 3

A DESCRIPTION OF THE PROBLEM :
When I unplugged and then plugged in an external monitor I noticed that squirrel java software had gone gray. Looking at the stack trace revealed a deadlock.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1) start squirrel sql
2) unplug external monitor
3) plug monitor back in


EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Java software continues running.
ACTUAL -
Java window is constant grey and does not react to anything.

ERROR MESSAGES/STACK TRACES THAT OCCUR :
Found one Java-level deadlock:
=============================
"AWT-EventQueue-1":
  waiting for ownable synchronizer 0x00000006e47f63f8, (a java.util.concurrent.locks.ReentrantLock$NonfairSync),
  which is held by "AWT-XAWT"
"AWT-XAWT":
  waiting to lock monitor 0x00007fcff0699e00 (object 0x00000006e4508080, a java.awt.Component$AWTTreeLock),
  which is held by "AWT-EventQueue-1"

Java stack information for the threads listed above:
===================================================
"AWT-EventQueue-1":
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0x00000006e47f63f8> (a java.util.concurrent.locks.ReentrantLock$NonfairSync)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:834)
at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:868)
at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1198)
at java.util.concurrent.locks.ReentrantLock$NonfairSync.lock(ReentrantLock.java:214)
at java.util.concurrent.locks.ReentrantLock.lock(ReentrantLock.java:290)
at sun.awt.SunToolkit.awtLock(SunToolkit.java:243)
at sun.awt.X11.XDecoratedPeer.getLocationOnScreen(XDecoratedPeer.java:909)
at java.awt.Component.getLocationOnScreen_NoTreeLock(Component.java:2045)
at java.awt.Component.getLocationOnScreen(Component.java:2023)
- locked <0x00000006e4508080> (a java.awt.Component$AWTTreeLock)
at javax.swing.SwingUtilities.convertPointToScreen(SwingUtilities.java:380)
at javax.swing.SwingUtilities.convertPoint(SwingUtilities.java:182)
at javax.swing.plaf.metal.MetalToolBarUI.doesMenuBarBorderToolBar(MetalToolBarUI.java:151)
at javax.swing.plaf.metal.MetalBorders$MenuBarBorder.paintBorder(MetalBorders.java:536)
at javax.swing.JComponent.paintBorder(JComponent.java:947)
at javax.swing.JMenuBar.paintBorder(JMenuBar.java:341)
at javax.swing.JComponent.paint(JComponent.java:1055)
at javax.swing.JComponent.paintChildren(JComponent.java:887)
- locked <0x00000006e4508080> (a java.awt.Component$AWTTreeLock)
at javax.swing.JComponent.paint(JComponent.java:1063)
at javax.swing.JLayeredPane.paint(JLayeredPane.java:586)
at javax.swing.JComponent.paintChildren(JComponent.java:887)
- locked <0x00000006e4508080> (a java.awt.Component$AWTTreeLock)
at javax.swing.JComponent.paintToOffscreen(JComponent.java:5232)
at javax.swing.RepaintManager$PaintManager.paintDoubleBuffered(RepaintManager.java:1486)
at javax.swing.RepaintManager$PaintManager.paint(RepaintManager.java:1417)
at javax.swing.BufferStrategyPaintManager.paint(BufferStrategyPaintManager.java:306)
at javax.swing.RepaintManager.paint(RepaintManager.java:1210)
at javax.swing.JComponent.paint(JComponent.java:1040)
at java.awt.GraphicsCallback$PaintCallback.run(GraphicsCallback.java:39)
at sun.awt.SunGraphicsCallback.runOneComponent(SunGraphicsCallback.java:79)
at sun.awt.SunGraphicsCallback.runComponents(SunGraphicsCallback.java:116)
at java.awt.Container.paint(Container.java:1968)
at java.awt.Window.paint(Window.java:3867)
at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:785)
at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:728)
at javax.swing.RepaintManager.prePaintDirtyRegions(RepaintManager.java:677)
at javax.swing.RepaintManager.access$700(RepaintManager.java:59)
at javax.swing.RepaintManager$ProcessingRunnable.run(RepaintManager.java:1625)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:701)
at java.awt.EventQueue.access$000(EventQueue.java:102)
at java.awt.EventQueue$3.run(EventQueue.java:662)
at java.awt.EventQueue$3.run(EventQueue.java:660)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:671)
at net.sourceforge.squirrel_sql.client.Main$1.dispatchEvent(Main.java:99)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:216)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:135)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:123)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:119)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:111)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:97)
"AWT-XAWT":
at java.awt.Component.getGraphicsConfiguration(Component.java:1142)
- waiting to lock <0x00000006e4508080> (a java.awt.Component$AWTTreeLock)
at sun.awt.image.SunVolatileImage.updateGraphicsConfig(SunVolatileImage.java:138)
at sun.awt.image.VolatileSurfaceManager.displayChanged(VolatileSurfaceManager.java:344)
at sun.awt.SunDisplayChanger.notifyListeners(SunDisplayChanger.java:132)
at sun.java2d.SunGraphicsEnvironment.displayChanged(SunGraphicsEnvironment.java:281)
at sun.awt.X11.XToolkit$1.dispatchEvent(XToolkit.java:323)
at sun.awt.X11.XToolkit.dispatchEvent(XToolkit.java:593)
at sun.awt.X11.XToolkit.run(XToolkit.java:688)
at sun.awt.X11.XToolkit.run(XToolkit.java:609)
at java.lang.Thread.run(Thread.java:722)


REPRODUCIBILITY :
This bug can be reproduced always.