RFR: 8255248: NullPointerException in JFXPanel due to race condition in HostContainer [v3]

[John Hendrikx]

On Thu, 20 Jul 2023 10:12:09 GMT, Prasanta Sadhukhan <psadhukhan at openjdk.org> wrote:

>> Due to transient datatype of scenePeer, it can become null which can result in NPE in scenarios where scene is continuously been reset and set, which warrants a null check, as is done in other places for the same variable.
>
> Prasanta Sadhukhan has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Check FXEnabled initially

tests/system/src/test/java/test/javafx/embed/swing/JFXPanelNPETest.java line 98:

> 96:         });
> 97:         SwingUtilities.invokeAndWait(JFXPanelNPETest::createUI);
> 98:         for (int i = 0; i < 300; i++) {

I think this is way too long for a unit test.  300 iterations, 200 ms each = 60 seconds

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PR Review Comment: https://git.openjdk.org/jfx/pull/1178#discussion_r1271118367