I'm using Eclipse 2023-06 on Windows 11.
I have the Spring Boot plugin set installed, with v4.19.1, the latest available at this time.
In the last few days, I've been severely hampered with either the "Spring Boot Language Server" or the "Spring Boot Validations Builder", simply running forever. When the SBLS job appears to be hung, I've just had to kill the external javaw process associated with that. That sometimes helps, but sometimes it just starts it up again and hangs again.
About 2 hours ago I decided to simply reboot and start everything again, and I then left for lunch. I started Eclipse, and it started a bunch of jobs, including the "Spring Boot Validations Builder", for one particular project. I came back an hour later, and it had barely changed.
I then tried cancelling that job, which in my experience is typically a waste of time, as it seems to never respect that. It's been running in that state for about 20 minutes now.
I've tried to turn off settings in the Spring section of preferences, but it doesn't seem to make any difference.
If it helps, here is a screenshot of my Progress View, which hasn't changed at all in hours now.