deadlock with swing

[Kevin Rushforth]

Hi Anton,

Can you file a bug in JBS? We can take a look at it, although it might 
be difficult without a test case.

-- Kevin


On 3/11/19 10:30 PM, Anton Tarasov wrote:
> Hello!
>
> Could you please take a look at the deadlock which we encounter with 
> JFXPanel/WebView:
>
> "AWT-EventQueue-0" prio=0 tid=0x0 nid=0x0 waiting on condition
>      java.lang.Thread.State: WAITING
>  on java.util.concurrent.FutureTask at 51c6338d
>     at java.base at 11.0.2/jdk.internal.misc.Unsafe.park(Native Method)
>     at 
> java.base at 11.0.2/java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)
>     at 
> java.base at 11.0.2/java.util.concurrent.FutureTask.awaitDone(FutureTask.java:447)
>     at 
> java.base at 11.0.2/java.util.concurrent.FutureTask.get(FutureTask.java:190)
>     at 
> platform/javafx.web at 11.0.2/com.sun.javafx.webkit.InputMethodClientImpl.getLocationOffset(InputMethodClientImpl.java:157)
>     at 
> platform/javafx.graphics at 11.0.2/javafx.scene.Scene$InputMethodRequestsDelegate.getLocationOffset(Scene.java:4140)
>     at 
> platform/javafx.swing at 11.0.2/javafx.embed.swing.InputMethodSupport$InputMethodRequestsAdapter.getLocationOffset(InputMethodSupport.java:67)
>     at 
> java.desktop at 11.0.2/sun.awt.im.InputMethodContext.getLocationOffset(InputMethodContext.java:285)
>     at 
> java.desktop at 11.0.2/sun.lwawt.macosx.CInputMethod$7.run(CInputMethod.java:779)
>     at 
> java.desktop at 11.0.2/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:303)
>     at 
> java.desktop at 11.0.2/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:776)
>     at java.desktop at 11.0.2/java.awt.EventQueue$4.run(EventQueue.java:727)
>     at java.desktop at 11.0.2/java.awt.EventQueue$4.run(EventQueue.java:721)
>     at 
> java.base at 11.0.2/java.security.AccessController.doPrivileged(Native 
> Method)
>     at 
> java.base at 11.0.2/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
>     at 
> java.base at 11.0.2/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:95)
>     at java.desktop at 11.0.2/java.awt.EventQueue$5.run(EventQueue.java:751)
>     at java.desktop at 11.0.2/java.awt.EventQueue$5.run(EventQueue.java:749)
>     at 
> java.base at 11.0.2/java.security.AccessController.doPrivileged(Native 
> Method)
>     at 
> java.base at 11.0.2/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
>     at 
> java.desktop at 11.0.2/java.awt.EventQueue.dispatchEvent(EventQueue.java:748)
>     at 
> com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:723)
>     at 
> com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:672)
>     at 
> com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:367)
>     at 
> java.desktop at 11.0.2/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
>     at 
> java.desktop at 11.0.2/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
>     at 
> java.desktop at 11.0.2/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
>     at 
> java.desktop at 11.0.2/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
>     at 
> java.desktop at 11.0.2/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
>     at 
> java.desktop at 11.0.2/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)
>
> "JavaFX Application Thread" prio=0 tid=0x0 nid=0x0 runnable
>      java.lang.Thread.State: RUNNABLE
>  (in native)
>     at 
> java.desktop at 11.0.2/sun.lwawt.macosx.LWCToolkit.$$YJP$$doAWTRunLoopImpl(Native 
> Method)
>     at 
> java.desktop at 11.0.2/sun.lwawt.macosx.LWCToolkit.doAWTRunLoopImpl(LWCToolkit.java)
>     at 
> java.desktop at 11.0.2/sun.lwawt.macosx.LWCToolkit.doAWTRunLoop(LWCToolkit.java:1027)
>     at 
> java.desktop at 11.0.2/sun.lwawt.macosx.LWCToolkit.invokeAndWait(LWCToolkit.java:827)
>     at 
> java.desktop at 11.0.2/sun.lwawt.macosx.LWCToolkit.invokeAndWait(LWCToolkit.java:780)
>     at 
> java.desktop at 11.0.2/sun.lwawt.macosx.CInputMethod.characterIndexForPoint(CInputMethod.java:777)
>
> It seems to be caused by this fix: 
> https://hg.openjdk.java.net/openjfx/11/rt/rev/808d535c4e15
>
> The "characterIndexForPoint" method performs "invokeAndWait" from 
> JavaFX thread:
>
>             LWCToolkit.invokeAndWait(new Runnable() {
>                 public void run() { synchronized(offsetInfo) {
>                     offsetInfo[0] = 
> fIMContext.getLocationOffset(screenX, screenY);
>                     insertPositionOffset[0] = 
> fIMContext.getInsertPositionOffset();
>                 }}
>             }, fAwtFocussedComponent);
>
> which is then on EDT delegates back to JavaFX thread and waits for 
> async result.
>
> Is it a known issue? Unfortunately, I can't give you a simple case to 
> reproduce it. Hope the problem looks clear from the description.
>
> With best regards,
> Anton.