RFR: 8274022 fixing critical memory leak in the ControlAcceleratorSupport

[Kevin Rushforth]

On Sat, 30 Oct 2021 10:56:40 GMT, Florian Kirmaier <fkirmaier at openjdk.org> wrote:

> This fixes the new ControlAcceleratorBug which was Introduced in JavaFX17.
> To fix it, I've made the Value of the WeakHashMap also weak. 
> We only keep this value to remove it as a listener later on. Therefore there shouldn't be issues by making this value weak.
> 
> 
> I've seen this Bug very very often, in the last weeks. Most of the applications I've seen are somehow affected by this bug.
> 
> It basically **breaks every application with menu bars and multiple stages** - which is the majority of enterprise applications. It's especially annoying because it takes some time until the application gets unstable.
> 
> Therefore **I would recommend** after this fix is approved, **to make a new version for JavaFX17** with this fix because this bug is so severe.

>   * [JDK-8274022](https://bugs.openjdk.java.net/browse/JDK-8274022): Additional Memory Leak in ControlAcceleratorSupport ⚠️ Title mismatch between PR and JBS.

@FlorianKirmaier as a reminder, the PR title must match the JBS title. Note that I modified the JBS title slightly, so when you do fix this, you will need to grab the updated title:


8274022: Additional Memory Leak in ControlAcceleratorSupport

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PR: https://git.openjdk.java.net/jfx/pull/659