It seems that you played and destroyed stuff from JBoss AS, your errors mentionned here don't seem related. I would suggest that you reinstall JBoss AS.
I allready tried it:
rm -Rf JBOSS_INSTALL_DIR
unzip the binaries and than deploy for the cms portlet i played with.
Am i missing something ? Any debug idias i can use ?
10x!
do you restart JBoss AS after deploying the cms portlet ? i don't think it hot-redeploys too well.
Yep, i restarted.
Post your full stack trace.
But you really just redeploy portal-core.sar ? Try without doing modification first maybe.