Thank you very much.
Now I understand the behavior, and the differences between 5.1 and 7 :)
I'm using the @PostConstruct annotation now, which works fine for me.
My only problem now is (in my special case), that I think the webservice should be destroyed if the configuration can not be loaded in the @PostConstruct method.
Is there any way to invoke that the webservice should be distroyed (within the @PostConstruct method)?