<Swing Dev> java.awt.Windows.setAlwaysOnTop implementation problem in Java8u25?

[Alexander Scherbatiy]

   Thank you for the report.

   I have created an issue on it: 8064468 ownedWindowList access 
requires synchronization in Window.setAlwaysOnTop() method
      https://bugs.openjdk.java.net/browse/JDK-8064468

   Thanks,
   Alexandr.

On 11/10/2014 4:14 PM, Holger Brands wrote:
> Hello,
>
> we observed the following exception on Java8u25 :
>
> java.util.ConcurrentModificationException
>
> at java.util.Vector$Itr.checkForComodification(Unknown Source)
>
> at java.util.Vector$Itr.next(Unknown Source)
>
> at java.awt.Window.setAlwaysOnTop(Unknown Source)
>
> at de.eurodata.commons.swing.SwingUtils$1.run(SwingUtils.java:344)
>
> at java.awt.event.InvocationEvent.dispatch(Unknown Source)
>
> at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
>
> at java.awt.EventQueue.access$400(Unknown Source)
>
> at java.awt.EventQueue$3.run(Unknown Source)
>
> at java.awt.EventQueue$3.run(Unknown Source)
>
> at java.security.AccessController.doPrivileged(Native Method)
>
> at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown 
> Source)
>
> at java.awt.EventQueue.dispatchEvent(Unknown Source)
>
> at 
> de.eurodata.commons.swing.event.AWTThrowableHandler.dispatchEvent(AWTThrowableHandler.java:28)
>
> at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
>
> at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
>
> at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
>
> at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
>
> at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
>
> at java.awt.EventDispatchThread.run(Unknown Source)
>
>
> It seems to me that java.awt.Windows.setAlwaysOnTop iterates over 
> "ownedWindowList" without proper synchronisation.
>
> What do you think?
>
> Thanks,
> Holger
>