Issue trying to port to jakartaee

[sgala]

Hi. I barely know Spring, but I tried to port the demo to jakartaee so that I can run it with tomcat 10.1

I have a fork with the code in branch jakartaee. It compiles and builds. It passes the unit/integration tests, but it fails to run with an error. As I said I'm not good at Spring, and this includes debugging.

I wonder if you can give me some hints as to where the error is and how to fix it. I would contribute back a pull request, once the code is running, if you are interested in integrating something like this.