Hello Markus,
the important part in the build log you sent is the one you can see near to the end, i.e. the brokenDC issue.
For this take a look at (NWDI)(CBS) the CBS-make log and-or CBS Web UI report broken DCs - Java Development - SCN Wiki
A little off topic, but since you are using MII perhaps you'll find this useful tooRelease activity using the cmstool
(this is not related to your current problem, it just crossed my mind seeing you use MII.)
I hope this helps
Regards
Ervin