That sounds too complicated for the beginners' forum; I shall move you. I'll try the IDEs forum first, where you should get help about the Eclipse problem.
I think that this is part of Sun's internal source management process actually, and doesn't have any special meaning to anyone not using their in-house tools and procedures.
The secret of how to be miserable is to constantly expect things are going to happen the way that they are "supposed" to happen.
You can have faith, which carries the understanding that you may be disappointed. Then there's being a willfully-blind idiot, which virtually guarantees it.
The only cure for that is hours of television radiation. And this tiny ad:
a bit of art, as a gift, the permaculture playing cards