Jersey 2.8 client is not ignoring unknown properties during deserialization

Question

I am using Jersey Client 2.8 and trying to register my own Jackson configurator which will sets custom ObjectMapper properties.

public class ConnectionFactory {
   private final Client client;
   public ConnectionFactory() {
   ClientConfig clientConfig = new ClientConfig();
   clientConfig.property(ClientProperties.FOLLOW_REDIRECTS, true);
   clientConfig.property(ClientProperties.CONNECT_TIMEOUT, connTimeoutSec * 1000);
   clientConfig.property(ClientProperties.READ_TIMEOUT, readTimeoutSec * 1000);
   this.client = ClientBuilder.newBuilder().register(JacksonConfigurator.class).register(JacksonFeature.class).withConfig(clientConfig).build();
   // Some more code here ...
   }
}

According to Example 8.15 in Jackson Registration documentation, this should register the following JacksonConfigurator class to the client.

import javax.ws.rs.ext.ContextResolver;
import javax.ws.rs.ext.Provider;

import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.ObjectMapper;

/**
 * Provides custom configuration for jackson.
 */
@Provider
public class JacksonConfigurator implements ContextResolver<ObjectMapper> {

    private final ObjectMapper mapper;

    public JacksonConfigurator() {
        mapper = new ObjectMapper();
        mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
    }

    @Override
    public ObjectMapper getContext(Class<?> type) {
        return mapper;
    }

}

If I deserialize the response from client, the client should ignore unrecognized fields in the response. But I am getting following error -

Caused by: com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException: Unrecognized field "xyz" (class LookupData), not marked as ignorable (3 known properties: "abc", "pqr", "def"])
 at [Source: org.glassfish.jersey.message.internal.EntityInputStream@55958273; line: 1, column: 11] (through reference chain: LookupData["xyz"])
    at com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException.from(UnrecognizedPropertyException.java:51)
    at com.fasterxml.jackson.databind.DeserializationContext.reportUnknownProperty(DeserializationContext.java:731)
    at com.fasterxml.jackson.databind.deser.std.StdDeserializer.handleUnknownProperty(StdDeserializer.java:915)
    at com.fasterxml.jackson.databind.deser.BeanDeserializerBase.handleUnknownProperty(BeanDeserializerBase.java:1292)
    at com.fasterxml.jackson.databind.deser.BeanDeserializerBase.handleUnknownVanilla(BeanDeserializerBase.java:1270)
    at com.fasterxml.jackson.databind.deser.BeanDeserializer.vanillaDeserialize(BeanDeserializer.java:247)
    at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:118)
    at com.fasterxml.jackson.databind.ObjectReader._bind(ObjectReader.java:1232)
    at com.fasterxml.jackson.databind.ObjectReader.readValue(ObjectReader.java:676)
    at com.fasterxml.jackson.jaxrs.base.ProviderBase.readFrom(ProviderBase.java:800)
    at org.glassfish.jersey.message.internal.ReaderInterceptorExecutor$TerminalReaderInterceptor.invokeReadFrom(ReaderInterceptorExecutor.java:257)
    at org.glassfish.jersey.message.internal.ReaderInterceptorExecutor$TerminalReaderInterceptor.aroundReadFrom(ReaderInterceptorExecutor.java:229)
    at org.glassfish.jersey.message.internal.ReaderInterceptorExecutor.proceed(ReaderInterceptorExecutor.java:149)
    at org.glassfish.jersey.message.internal.MessageBodyFactory.readFrom(MessageBodyFactory.java:1124)
    at org.glassfish.jersey.message.internal.InboundMessageContext.readEntity(InboundMessageContext.java:851)
    ... 39 more

Can someone please let me know if I am missing something while registering the JacksonConfigurator class?

Answer 1

Try initializing the Jersey client with a JacksonJsonProvider that's been configured appropriately:

final JacksonJsonProvider jacksonJsonProvider = new JacksonJaxbJsonProvider().configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
final Client client = ClientBuilder.newClient(new ClientConfig(jacksonJsonProvider));

This was tested with Jackson 2.5.1 and Jersey 2.17

Answer 2

I had same issue and looking for a solution... find your proposition and it works for me :)

My test is very basic / see here below :

    Client client = ClientBuilder.newClient()
            .register(JacksonFeature.class).register(JacksonConfigurator.class);


    WebTarget wt = client.target(REST_SERVICE_URL).path(
            "amount");
    wt = wt.queryParam("from", "USD");

    ConverterResponse cr=wt.request().get(ConverterResponse.class);

If I don't register your JacksonConfigurator, I get same exception as yours :

UnrecognizedPropertyException: Unrecognized field 

Because converterResponse defines a subset of REST response object methods.

Thank you very much !