JSON conversion to POJO object failing for new fields in JBoss EAP 7

Issue

Jackson JSON library is being used to convert some JSON objects to POJO classes.
The problem is, the JSON object have a new "isShared" field added which is not present in the POJO class.

This is working fine in JBoss EAP ť, but it is breaking in JBoss EAP ý with the following exception:

Caused by: com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException: Unrecognized field "isShared" (class com.services.document.DocumentModel), not marked as ignorable

Below is the configuration provided in the class:

import org.codehaus.jackson.map.DeserializationConfig;
import org.codehaus.jackson.map.ObjectMapper;

@Provider
@Produces(MediaType.APPLICATION_JSON)
@Singleton
public class ObjectMapperProvider implements ContextResolver<ObjectMapper> {

    public ObjectMapper getContext(Class<?> aClass) {
        ObjectMapper mapper = new ObjectMapper();
        mapper.configure(DeserializationConfig.Feature.FAIL_ON_UNKNOWN_PROPERTIES, false);
        return mapper;
    }
}

It seems that it could be solved by using @JsonIgnoreProperties(ignoreUnknown = true) on the POJO class to ignore the unknown property. But is this really required? Should the configuration mentioned above not be sufficient - DeserializationConfig.Feature.FAIL_ON_UNKNOWN_PROPERTIES, false ?