Can't start web service app (archiva - embedded jetty) on bbb ubuntu

I’m trying to set up a bbb as a local server. I have git running but wanted to add archiva to act as a local maven repository. I downloaded the standalone version of archiva and tried to start it. It complained that it didn’t have appropriate wrapper classes. The wrapper classes appear to be both OS and arch specific. I’m confused as to why it needs .so files for something that shouldn’t need to diddle hardware at all but I also just want it to work. Any ideas on resolving this or should I just use .war file instead?