Java 7 Application freeze at sun.lwawt.macosx.CCursorManager.nativeGetCursorPosition

[Mickey Segal]

Is this problem related to the problem described in the bug report about the refresh problem shown at http://www.segal.org/java/refresh4/ ?  

Apple seems to have concluded this is Oracle's problem and Oracle seems to have concluded this is Apple's problem.

Petr Pchelko wrote:

It's known that there are some deadlocks in SWT_AWT bridge on Mac. Here's an example:
https://bugs.openjdk.java.net/browse/JDK-8020165

It would be useful if you also post the dump of an Appkit thread to identify your particular case.

The deadlock occurs because AWT is called on the main thread. So the main thread get blocked on some internal AWT lock, while the EventDispatchThread is trying to perform a synchronous operation on the main thread. It's not quite obvious how to fix that internally, because for the normal AWT application we have a strict rule not to acquire locks on the Appkit thread. 

For now the workaround could be to wrap all the usages of AWT inside invokeLater (except the initial
SWT_AWT.new_Frame(composite) call). This should fix your deadlock. 

Also, which version of SWT are you using? The newer versions are patched so that you could not set the embeddedFrameClass explicitly. That patch also contains additional changes in bridge initialization, so the bridge does not work quite well with older versions. This could be another reason of your deadlock.