title: Jersey 2.0 and Moxy Internal Server Error But No Server Log
body: <p>I followed the Jersey 2.0 document (<a href="https://jersey.java.net/documentation/latest/user-guide.html#json.moxy">https://jersey.java.net/documentation/latest/user-guide.html#json.moxy</a>), modified pom.xml, included jersey-media-moxy artifact, compiled and installed. I could get basic POJO to JSON mapping work for both Produces and Consumes cases.</p>
  
  <p>However, when I tried with some POJO with complex data type as resource return type, I got a lot Status 500 Internal Server Error but without any server log. It is very annoying.  Does anybody know if it is a bug or I missed something in configuration?</p>
  
  <p>By the way, in order to use Moxy mapping for a POJO object, the POJO needs to have a empty parameter constructor.   Are there any other requirements? </p>