RFR: 8340405: JavaFX shutdown hook can hang preventing app from exiting

[Kevin Rushforth]

On Fri, 20 Sep 2024 13:10:11 GMT, Johan Vos <jvos at openjdk.org> wrote:

> Regardless of this fix, it would still be good to have a fix for [JDK-8238505](https://bugs.openjdk.org/browse/JDK-8238505) (although that is likely less urgent now that the CI blocking is tackled) -- and there might be other issues that cause the dispose thread to not finish.

Agreed on both points. While [JDK-8238505](https://bugs.openjdk.org/browse/JDK-8238505) is less urgent after this fix, it's still a bug. I instrumented the timer and dispose code as part of evaluating and then filing this shutdown hook bug, and I'll add some comments by way of a partial evaluation of that bug.

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PR Comment: https://git.openjdk.org/jfx/pull/1574#issuecomment-2364048160