title: RESTeasy 3.0.16 missing something (RESTEASY003210)
body: <p>I have this all working in one webapp and not working with another and cannot for the life of me see what the difference is.</p>
  
  <p>RESTeasy 3.0.16 (also tried 3.0.13)
  Tomcat 7.0.67</p>
  
  <p>Libraries: resteasy-servlet-initializer, resteasy-jaxrs, resteasy-jackson2-provider</p>
  
  <p>web.xml</p>
  
  <pre><code>&lt;web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xmlns="http://java.sun.com/xml/ns/javaee" 
      xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
      xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
      id="WebApp_ID" 
      version="2.5"&gt;
  
      &lt;display-name&gt;REST Service&lt;/display-name&gt;
  &lt;/web-app&gt;
  </code></pre>
  
  <p>ServiceApplication.java</p>
  
  <pre><code>@ApplicationPath("/api")
  public class ServiceApplication extends Application { }
  </code></pre>
  
  <p>ServiceInterface.java</p>
  
  <pre><code>public interface ServiceInterface {
       @GET
       @Path("/ping")
       @Produces(MediaType.TEXT_HTML)
       public Response ping();
  }
  </code></pre>
  
  <p>Service.java</p>
  
  <pre><code>public class Service implements ServiceInterface, Serializable {    
      @Override
      public Response ping() {
          return NoCacheResponseBuilder(Response.Status.OK).entity("PING").build();
      }
  </code></pre>
  
  <p>Calling <a href="http://localhost:8080/webapp/api/ping" rel="nofollow">http://localhost:8080/webapp/api/ping</a> causes a RESTEASY003210 exception.</p>