Marshaling / Demarshaling JSON with Java EE 7 / Glassfish 4.1 results in null object
You should be able to solve this by disabling MOXy (register the class below in getClasses()) and get rid of your set.add(new JacksonJsonProvider()); singleton. I use this for all my GF4 projects to force Jersey to use Jackson.
/** * Feature to disable Moxy and Enable Jackson processing */private static class Jackson2Feature implements Feature { @Override public boolean configure(FeatureContext context) { final String disableMoxy = PropertiesHelper.getPropertyNameForRuntime( CommonProperties.MOXY_JSON_FEATURE_DISABLE, context.getConfiguration().getRuntimeType()); context.property(disableMoxy, true); // add the default Jackson exception mappers and allow jaxb annotations context.register(JsonParseExceptionMapper.class); context.register(JacksonJaxbJsonProvider.class, MessageBodyReader.class, MessageBodyWriter.class); return true; }}