RFR: 8223296: NullPointerException in GlassScene.java at line 325

[Kevin Rushforth]

On Tue, 10 Dec 2019 07:00:50 GMT, Ambarish Rapte <arapte at openjdk.org> wrote:

> Issue: NPE in GlassScene.frameRendered().
> 
> Cause: scenePaintListener is set in setTKScenePaintListener(), used in frameRendered() and 
> set to null in dispose().
> setTKScenePaintListener() and dispose() are called on JavaFX Application Thread and 
> frameRendered() is called by QuantumRenderer thread.
> setTKScenePaintListener() and frameRendered() are synchronized but dispose() is not.
> 
> Fix:
> dispose() should use the synchronized setTKScenePaintListener() to set scenePaintListener to null.
> 
> Verification:
> This is a very rare issue and cannot be reliably reproduced with a test case.



-------------

Marked as reviewed by kcr (Lead).

PR: https://git.openjdk.java.net/jfx/pull/64