Why is Eclipse Juno 4.2 running “JPA Java Change Event Handler” processes?

Question

I have just upgraded to Eclipse Juno 4.2. I have a completely clean new workspace, but have imported projects that have previously been used in Eclipse 3.7 and therefore have so

Answer 1

The drastic solution in my case was to uninstall "Dali JPA". That seemed to solve the issue for me.

Of course it is not the best solution. Try first to enable the validation as explained in NPE's anwser. Bug 386171 has people that report the same problem at May of 2015 so I must not be the only one.

I would be very happy to delete my answer if something better is found.