Steps to reproduce, just deploy: https://github.com/abstractj/aerogear-controller-demo/tree/multiple-args

And run:

curl -v -H "Accept: application/json" -H "Content-type: application/json" -d '

{"firstname":"John","lastname":"doe", "username":"hipster", "password":"plaintext"}

' -X POST http://localhost:8080/aerogear-controller-demo/test