The OutSystems Platform (either the editions) allows you to integrate through Web Services directly with Service Studio, that generally comply with the WSDL 1.1 specification (SOAP 1.1 or SOAP 1.2).
There are a few scenarios where these web services are not supported for Service Studio direct consumption, but are always able to be imported through custom development with an Integration Studio extension. These rare scenarios may involve multi-port listening, multiple namespaces and name clashing across namespaces, external dependencies, overloaded methods and recursive data, or "any" type objects definition.
From the stacks you've provided, in this case, it seams that the Java web service is expecting method arguments that don't comply with the provided signature.
Can you tell us what framework is generating these web services, and provide us with the WSDL (Web Service definition file) of that web service for analysis?