Payara5 + RestEasy 6.0.1 uses Yasson

Question

When we upgraded RestEasy to 6.0.1 on Payara 5, we noticed that Payara now uses Yasson to serialize and deserialize objects, resulting in all @JsonIgnore, @JsonProperty to be ignored. We have added the jersey.config.jsonFeature context-param as specified in the docs:

<context-param>
    <param-name>jersey.config.jsonFeature</param-name>
    <param-value>JacksonFeature</param-value>
</context-param>

Falling back to RestEasy to 3, 4 or 5, Payara 5 again starts using Jackson and all @Json annotations are honored again.

How does RestEasy decide the provider (Yasson vs Jackson) and how can one force Jackson in RestEasy 6.0.1 on Payara?

Answer 1

After spending a couple of days investigating this, the solution was to:

1. Add jersey-media-json-jackson dependency to the POM:

  <dependency>
      <groupId>org.glassfish.jersey.media</groupId>
      <artifactId>jersey-media-json-jackson</artifactId>
      <version>2.26</version>
  </dependency>

2. Register org.glassfish.jersey.jackson.JacksonFeature.class in your Application class like so:

   @ApplicationPath("services")
    public class ApplicationConfig extends Application {
   
    @Override
    public Set<Class<?>> getClasses() {
        Set<Class<?>> classes = new HashSet<Class<?>>();
        classes.add(org.glassfish.jersey.jackson.JacksonFeature.class);
        // add the rest of your classes here
        return classes;
    }   
    }