title: Quarkus org.jboss.resteasy.spi.UnhandledException: Unable to find a MessageBodyReader of content-type application/json
body: <p>I am trying to implement the REst Client example from the Quarkus website (code 1:1): <a href="https://quarkus.io/guides/rest-client" rel="nofollow noreferrer">https://quarkus.io/guides/rest-client</a></p>
  
  <p>When I launch <a href="http://localhost:8080/country/name/greece" rel="nofollow noreferrer">http://localhost:8080/country/name/greece</a> I get:</p>
  
  <pre><code>Error handling ce3120e3-1a55-418e-a5a1-a17a80d7e278-1, org.jboss.resteasy.spi.UnhandledException: javax.ws.rs.ProcessingException: RESTEASY003145: Unable to find a MessageBodyReader of content-type application/json;charset=utf-8 and type interface java.util.Set
  </code></pre>
  
  <p>After some reading on the internets I stumbled upon a hint, that it could be connected to a missing Jackson dependency.
  So I added the below and reran (same error regardless of the version):</p>
  
  <pre><code>&lt;dependency&gt;
     &lt;groupId&gt;io.quarkus&lt;/groupId&gt;
     &lt;artifactId&gt;quarkus-resteasy-jackson&lt;/artifactId&gt;
     &lt;version&gt;1.3.0.Alpha2&lt;/version&gt;
  &lt;/dependency&gt;
  </code></pre>
  
  <p>Now I get the following issue:</p>
  
  <pre><code>Error handling 00077d3a-bbdb-48ee-b84b-653bf98baefc-2, org.jboss.resteasy.spi.UnhandledException:
  javax.ws.rs.ProcessingException: com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException:
  Unrecognized field "topLevelDomain" (class org.acme.Country),
  not marked as ignorable (4 known properties: "capital", "alpha2Code", "name", "currencies"])
  </code></pre>
  
  <p>My stack is Quarkus 1.2.1, JDK 12.0.2 and Windows 10.
  Any ideas what I might be doing wrong?</p>