Okay, I corrected source and target jdk in pom.xml and got it to deploy correctly, but although all files are now in an exploded directory below default/deploy, I get an http 404 error if I access the URL. The jboss console confirmed the deployment. No error message is shown.
On the other hand, if I copy the war manually, the application works.
BTW, I am new to Maven and don't understand why it created two directories (...-SNAPSHOT and src/main/webapp) with duplicated web.xml etc. files. What is the purpose of the ...-SNAPSHOT directory?
Thanks,
Ulrich