I tried searching on google and found a range of answers/hints but nothing relevant. I think the problem is with JAXB libraries and the way WSDL is generated by the other system, but could not zero down on anything concrete. Any help will be appreciated.
I tried running the wsdl2java tool in bundled with apache CXF 3 and that seems to work without any errors or warnings. Seems to suggest that somehow I need to replace the version used by activiti-cxf to version 3/latest?