ClassNotFoundException: Unable to load builtin provider: org.jboss.resteasy.plugins.providers.jaxb.json.JettisonSeeAlsoProvider

Class TestRestEasy { public static void main(String[] args){ try { ClientRequest request = new ClientRequest("http://api.discogs.com/search?q=beatles&f=xml"); ClientResponse<DiscogsResponse> r = request.get(DiscogsResponse.class); DiscogsResponse discres = r.getEntity(); System.out.println(discres.exactResults.size()); } catch (Exception e) { e.printStackTrace(); } } } POJOs-------------------------------- @XmlRootElement(name = "resp") public class DiscogsResponse { @XmlAttribute(name = "stat") public String stat; @XmlAttribute(name = "version") public String version; @XmlElementWrapper(name = "exactresults") @XmlElement(name="result") public List<Result> exactResults; @XmlElementWrapper(name = "searchresults") @XmlElement(name="result") public List<Result> searchResults; } POJO 2------------- public class Result { @XmlAttribute private String num; @XmlAttribute private String type; @XmlElement private String title; @XmlElement private String uri; @XmlElement private String thumb; @XmlElement private String summary; }