XTS transaction deployment failing with error:
Currently it's not possible to use XTS transaction on ER4.
The reason (what I can say) is that the XTS transactions are distributed as sar module which is unpacked to deploy dir for installation (check $JBOSS_HOME/docs/examples/transactions/README.txt). The .sar contains some jars (which are signed) and exploded directory structure with several classes which are obviously unsigned (as they are exploded).
The exploded directory structure should be put to jar which will be signed as well.