Google App Engine and Spring MVC 5
I've tried new Spring Framework (Wweb MVC 5) with Standard AppEngine runtime (Java8). Unfortunately "most standard" approach to initialise application with extending AbstractAnnotationConfigDispatcherServletInitializer  class has failed miserably:   public class EntryPoint extends AbstractAnnotationConfigDispatcherServletInitializer {       @Override      protected Class<?>[] getRootConfigClasses() {          return new Class<?>[]{RootConf.class};      }       @Override      protected Class<?>[] getServletConfigClasses() {          return new Class<?>[]{WebConf.class};      }       @Override      protected String[] getServletMappings() {          return new String[]{"/"};      }   }     The failure was (it really seems to be platform rather than Spring issue):    org.eclipse.jetty.annotations.ServletContainerIn...