FULL PRODUCT VERSION :
java version "1.6.0_06"
Java(TM) SE Runtime Environment (build 1.6.0_06-b02)
Java HotSpot(TM) Client VM (build 10.0-b22, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows XP [Version 5.1.2600]

A DESCRIPTION OF THE PROBLEM :
There is a deadlock when I tried bringing up the JFileChooser. The symptom is very similar to 6744953 but has a different stack:


Thread [AWT-EventQueue-0] (Suspended)
owns: Win32ShellFolder2 (id=48)
owns: Component$AWTTreeLock (id=54)
Unsafe.park(boolean, long) line: not available [native method]
LockSupport.park(Object) line: 158
FutureTask$Sync(AbstractQueuedSynchronizer).parkAndCheckInterrupt() line: 747
FutureTask$Sync(AbstractQueuedSynchronizer).doAcquireSharedInterruptibly(int) line: 905
FutureTask$Sync(AbstractQueuedSynchronizer).acquireSharedInterruptibly(int) line: 1217
FutureTask$Sync.innerGet() line: 218
FutureTask<V>.get() line: 83
Win32ShellFolderManager2$ComInvoker.invoke(Callable<T>) line: 495
Win32ShellFolder2.hasAttribute(int) line: 520
Win32ShellFolder2.isLink() line: 737
WindowsFileSystemView(FileSystemView).isFileSystem(File) line: 281
WindowsFileSystemView(FileSystemView).getSystemDisplayName(File) line: 155
BasicFileChooserUI$BasicFileView.getName(File) line: 1157
JFileChooser.getName(File) line: 1478
FilePane$FileRenderer.getListCellRendererComponent(JList, Object, int, boolean, boolean) line: 1320
BasicListUI.updateLayoutState() line: 1342
BasicListUI.maybeUpdateLayoutState() line: 1292
BasicListUI.getPreferredSize(JComponent) line: 559
FilePane$3(JComponent).getPreferredSize() line: 1632
ScrollPaneLayout$UIResource(ScrollPaneLayout).layoutContainer(Container) line: 769
JScrollPane(Container).layout() line: 1432
JScrollPane(Container).doLayout() line: 1421
JScrollPane(Container).validateTree() line: 1519
JPanel(Container).validateTree() line: 1526
FilePane(Container).validateTree() line: 1526
JFileChooser(Container).validateTree() line: 1526
JPanel(Container).validateTree() line: 1526
JLayeredPane(Container).validateTree() line: 1526
JRootPane(Container).validateTree() line: 1526
AddBlockTemplateCatalogDialog(Container).validateTree() line: 1526
AddBlockTemplateCatalogDialog(Container).validate() line: 1491
AddBlockTemplateCatalogDialog(Window).pack() line: 679
AddBlockTemplateCatalogDialog(BaseDialog).showDialog(boolean) line: 142
AddBlockTemplateCatalogAction.actionPerformed(ActionEvent) line: 59
JButton(AbstractButton).fireActionPerformed(ActionEvent) line: 1995
AbstractButton$Handler.actionPerformed(ActionEvent) line: 2318
DefaultButtonModel.fireActionPerformed(ActionEvent) line: 387
DefaultButtonModel.setPressed(boolean) line: 242
BasicButtonListener.mouseReleased(MouseEvent) line: 236
AWTEventMulticaster.mouseReleased(MouseEvent) line: 272
JButton(Component).processMouseEvent(MouseEvent) line: 6041
JButton(JComponent).processMouseEvent(MouseEvent) line: 3265
JButton(Component).processEvent(AWTEvent) line: 5806
JButton(Container).processEvent(AWTEvent) line: 2058
JButton(Component).dispatchEventImpl(AWTEvent) line: 4413
JButton(Container).dispatchEventImpl(AWTEvent) line: 2116
JButton(Component).dispatchEvent(AWTEvent) line: 4243
LightweightDispatcher.retargetMouseEvent(Component, int, MouseEvent) line: 4322
LightweightDispatcher.processMouseEvent(MouseEvent) line: 3986
LightweightDispatcher.dispatchEvent(AWTEvent) line: 3916
MainFrame(Container).dispatchEventImpl(AWTEvent) line: 2102
MainFrame(Window).dispatchEventImpl(AWTEvent) line: 2440
MainFrame(Component).dispatchEvent(AWTEvent) line: 4243
EventQueue.dispatchEvent(AWTEvent) line: 599
EventDispatchThread.pumpOneEventForFilters(int) line: 273
EventDispatchThread.pumpEventsForFilter(int, Conditional, EventFilter) line: 183
EventDispatchThread.pumpEventsForHierarchy(int, Conditional, Component) line: 173
EventDispatchThread.pumpEvents(int, Conditional) line: 168
EventDispatchThread.pumpEvents(Conditional) line: 160
EventDispatchThread.run() line: 121


Daemon System Thread [Swing-Shell] (Suspended)
owns: Vector<E> (id=49)
waiting for: Win32ShellFolder2 (id=48)
Win32ShellFolder2.isFileSystem() line: 510
Win32ShellFolder2.equals(Object) line: 484
Vector<E>(AbstractList<E>).equals(Object) line: 507
Vector<E>.equals(Object) line: 925
BasicDirectoryModel$LoadFilesThread$1.call() line: 314
BasicDirectoryModel$LoadFilesThread$1.call() line: 221
FutureTask$Sync.innerRun() line: 303
FutureTask<V>.run() line: 138
ThreadPoolExecutor$Worker.runTask(Runnable) line: 885
ThreadPoolExecutor$Worker.run() line: 907
Win32ShellFolderManager2$ComInvoker$3.run() line: 458
Thread.run() line: 619


Above stacks were taken from inside eclipse debug.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
It seems to be happening more often if I visited a directory with a lot of folders/files once. Close it and try to reopen it again.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Deadlock inside swing's thread is bad, especially all we're doing is to bring up the JFileChooser.

Looks like the Swing-shell is locking a Vector object (id=49) triggered by a FutureTask.
ACTUAL -
It shouldn't deadlock!

REPRODUCIBILITY :
This bug can be reproduced always.