ApplicationBase.java

    /**
     * Replaces the DropWizard exception mappers with our own mappers that return exceptions in JSON format
     * @param environment
     */
    private void configureExceptionMappers(Environment environment) {

        ResourceConfig jrConfig = environment.jersey().getResourceConfig();
        Set<Object> dwSingletons = jrConfig.getSingletons();
        List<ExceptionMapper> singletonsToRemove = new ArrayList<>();

        // Find all ExceptionMappers that are already registered in the jersey configuration
        for (Object s : dwSingletons) {
            String className = s.getClass().getName();
            if (s instanceof ExceptionMapper && (className.startsWith("com.yammer.dropwizard.jersey.") || className.startsWith("com.codahale.dropwizard.jersey.") || className.startsWith("io.dropwizard.jersey."))) {
                singletonsToRemove.add((ExceptionMapper)s);
            }
        }

        // Register our exception mappers
        environment.jersey().register(new JsonLoggingExceptionMapper());
        environment.jersey().register(new JsonConstraintViolationExceptionMapper());
        environment.jersey().register(new JsonJsonProcessingExceptionMapper());
        environment.jersey().register(new JsonParseExceptionMapper());
        environment.jersey().register(new JsonEarlyEofExceptionMapper());

        JerseyHacks.removeComponents(jrConfig, singletonsToRemove);

    }

CollectionUtil.java

import java.util.Set;

public class CollectionUtil {

    // Warning: This is JVM implementation-specific 
    @SuppressWarnings("unchecked")
    public static <T> Set<T> getModifiableSet(Set<T> collection) {
        Object orig = ReflectionUtil.getFieldValue(collection, "c");
        if (orig != null) {
            return (Set<T>)orig;
        }
        return collection;
    }

}

JerseyHacks.java

import com.sagedevices.platform.util.CollectionUtil;
import com.sagedevices.platform.util.ReflectionUtil;
import org.glassfish.jersey.model.internal.CommonConfig;
import org.glassfish.jersey.model.internal.ComponentBag;
import org.glassfish.jersey.server.ResourceConfig;

import java.util.Collection;
import java.util.Set;

public class JerseyHacks {

    public static void removeComponents(ResourceConfig config, Collection<?> components) {

        Set<Object> objects = CollectionUtil.getModifiableSet(config.getSingletons());
        objects.removeAll(components);

        Set<Object> cachedSingletons = ReflectionUtil.getFieldValue(config, "cachedSingletons");
        cachedSingletons.removeAll(components);

        CommonConfig commonConfig = ReflectionUtil.getFieldValue(config, "state");
        ComponentBag componentBag = ReflectionUtil.getFieldValue(commonConfig, "componentBag");
        Set<Object> instances = ReflectionUtil.getFieldValue(componentBag, "instances");
        instances.remove(components);
        Set<Object> instancesView = ReflectionUtil.getFieldValue(componentBag, "instances");
        instancesView = CollectionUtil.getModifiableSet(instancesView);
        instancesView.remove(components);

    }

}

ReflectionUtil.java

    @SuppressWarnings("unchecked")
    public static <E> E getFieldValue(Object object, String fieldName) {
        Class<?> clazz = object.getClass();
        while (clazz != null) {
            try {
                Field field = clazz.getDeclaredField(fieldName);
                field.setAccessible(true);
                return (E) field.get(object);
            } catch (NoSuchFieldException e) {
                clazz = clazz.getSuperclass();
            } catch (Exception e) {
                return null;
            }
        }
        return null;
    }