EventData value changes are not applied after server reload

[mshabarov]

Description of the bug

Changes in @EventData value are not applied after server restart, when I use JRebel for live-reload.
As a developer, I want to immediately see the changes in event data, e.g. if I want to rename the event.detail parameter from @EventData("event.detail.position") to @EventData("event.detail.coordinate") and have a working Java event handling without full server restart or browser page refresh.

Expected behavior

Changes to event data are applied immediately after server reload, this is how it works when using HotswapAgent.
However, with JRebel it requires a page refresh or server restart.

Minimal reproducible example

1. Change event.detail.coordinate to e.g. event.detail.coordinate111
2. Start the project with JRebel
3. Open localhost:8080
4. Move the marker to other place on the map component
5. Notice an exception in server logs and no pop up message
6. Change the param name to event.detail.coordinate, save the file, wait for class reload
7. Do step 4 and observe same issues in step 5.

Project example
event-data-jrebel.zip

Versions

• Vaadin / Flow version: 24.6.0.beta
• JRebel nightly build JRebel Agent 2024.4.2-SNAPSHOT (2024-11-21 11:38)