Jersey 2.0 and Moxy Internal Server Error But No Server Log
I had the same problem and found this post:
The author implemented ApplicationEventListener to log the exceptions thrown by Moxy. This is my implementation (needs to be registered in your application):
public class ExceptionListener implements ApplicationEventListener { @Override public void onEvent(ApplicationEvent event) { } @Override public RequestEventListener onRequest(RequestEvent requestEvent) { return new ExceptionRequestEventListener(); } public static class ExceptionRequestEventListener implements RequestEventListener{ private final Logger logger; public ExceptionRequestEventListener(){ logger = Logger.getLogger(getClass()); } @Override public void onEvent(RequestEvent event) { switch (event.getType()){ case ON_EXCEPTION: Throwable t = event.getException(); logger.error("Found exception for requestType: "+event.getType(), t); } } }}
The official Jersey examples that demonstrate how to integrate EclipseLink MOXy can be found at the following link:
Where to find the stacktrace for the internal server error will depend upon your setup, can you provide additional information about yours?
Using the above example if I remove the default constructor from the org.glassfish.jersey.examples.jsonmoxy.TestBean class I will get the following exceptions when running mvn test. One of them is good and the other is bad. I'm going to follow up with the Jersey lead to work out the proper behaviour.
Bad Exception
testGet(org.glassfish.jersey.examples.jsonmoxy.JsonResourceTest) Time elapsed: 0.507 sec <<< ERROR!javax.ws.rs.InternalServerErrorException: HTTP 500 Internal Server Error at org.glassfish.jersey.client.JerseyInvocation.convertToException(JerseyInvocation.java:904) at org.glassfish.jersey.client.JerseyInvocation.translate(JerseyInvocation.java:749) at org.glassfish.jersey.client.JerseyInvocation.access$500(JerseyInvocation.java:88) at org.glassfish.jersey.client.JerseyInvocation$2.call(JerseyInvocation.java:650) at org.glassfish.jersey.internal.Errors.process(Errors.java:315) at org.glassfish.jersey.internal.Errors.process(Errors.java:297) at org.glassfish.jersey.internal.Errors.process(Errors.java:228) at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:426) at org.glassfish.jersey.client.JerseyInvocation.invoke(JerseyInvocation.java:646) at org.glassfish.jersey.client.JerseyInvocation$Builder.method(JerseyInvocation.java:375) at org.glassfish.jersey.client.JerseyInvocation$Builder.get(JerseyInvocation.java:275) at org.glassfish.jersey.examples.jsonmoxy.JsonResourceTest.testGet(JsonResourceTest.java:76)Good Exception
roundTripTest(org.glassfish.jersey.examples.jsonmoxy.JsonResourceTest) Time elapsed: 0.048 sec <<< ERROR!javax.ws.rs.WebApplicationException: HTTP 500 Internal Server Error at org.eclipse.persistence.exceptions.JAXBException.factoryMethodOrConstructorRequired(JAXBException.java:144) at org.eclipse.persistence.jaxb.compiler.AnnotationsProcessor.finalizeProperties(AnnotationsProcessor.java:896) at org.eclipse.persistence.jaxb.compiler.AnnotationsProcessor.processClassesAndProperties(AnnotationsProcessor.java:282) at org.eclipse.persistence.jaxb.compiler.Generator.<init>(Generator.java:150) at org.eclipse.persistence.jaxb.JAXBContext$TypeMappingInfoInput.createContextState(JAXBContext.java:1017) at org.eclipse.persistence.jaxb.JAXBContext.<init>(JAXBContext.java:174) at org.eclipse.persistence.jaxb.JAXBContextFactory.createContext(JAXBContextFactory.java:165) at org.eclipse.persistence.jaxb.JAXBContextFactory.createContext(JAXBContextFactory.java:152) at org.eclipse.persistence.jaxb.JAXBContextFactory.createContext(JAXBContextFactory.java:112) at org.eclipse.persistence.jaxb.JAXBContextFactory.createContext(JAXBContextFactory.java:102) at org.eclipse.persistence.jaxb.rs.MOXyJsonProvider.getJAXBContext(MOXyJsonProvider.java:302) at org.eclipse.persistence.jaxb.rs.MOXyJsonProvider.writeTo(MOXyJsonProvider.java:787) at org.glassfish.jersey.message.internal.WriterInterceptorExecutor$TerminalWriterInterceptor.aroundWriteTo(WriterInterceptorExecutor.java:194) at org.glassfish.jersey.message.internal.WriterInterceptorExecutor.proceed(WriterInterceptorExecutor.java:139) at org.glassfish.jersey.filter.LoggingFilter.aroundWriteTo(LoggingFilter.java:268) at org.glassfish.jersey.message.internal.WriterInterceptorExecutor.proceed(WriterInterceptorExecutor.java:139) at org.glassfish.jersey.message.internal.MessageBodyFactory.writeTo(MessageBodyFactory.java:1005) at org.glassfish.jersey.client.ClientRequest.writeEntity(ClientRequest.java:430) at org.glassfish.jersey.client.HttpUrlConnector._apply(HttpUrlConnector.java:290) at org.glassfish.jersey.client.HttpUrlConnector.apply(HttpUrlConnector.java:203) at org.glassfish.jersey.client.ClientRuntime.invoke(ClientRuntime.java:215) at org.glassfish.jersey.client.JerseyInvocation$2.call(JerseyInvocation.java:650) at org.glassfish.jersey.internal.Errors.process(Errors.java:315) at org.glassfish.jersey.internal.Errors.process(Errors.java:297) at org.glassfish.jersey.internal.Errors.process(Errors.java:228) at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:426) at org.glassfish.jersey.client.JerseyInvocation.invoke(JerseyInvocation.java:646) at org.glassfish.jersey.client.JerseyInvocation$Builder.method(JerseyInvocation.java:402) at org.glassfish.jersey.client.JerseyInvocation$Builder.post(JerseyInvocation.java:305) at org.glassfish.jersey.examples.jsonmoxy.JsonResourceTest.roundTripTest(JsonResourceTest.java:84)UPDATE
Starting with EclipseLink 2.5.1 you can use MOXyJsonProvider standalone to test your model.
import java.lang.reflect.Field;import java.util.*;import org.eclipse.persistence.jaxb.rs.MOXyJsonProvider;public class Demo { private List<Foo> foos; public static void main(String[] args) throws Exception { MOXyJsonProvider moxyJsonProvider = new MOXyJsonProvider(); Field field = Demo.class.getDeclaredField("foos"); List<Foo> foos = new ArrayList<Foo>(1); Foo foo = new Foo(); foo.setBar("Hello World"); foos.add(foo); moxyJsonProvider.writeTo(foos, field.getType(), field.getGenericType(), null, null, null, System.out); }}