org.hibernate.LazyInitializationException

[a7724172]

i I spend a lot of timeWorking on this problem but fail  please help me

The environment is jboss 7.1  ,use the jboss7.1 jar

I am in accordance with the resteasy-jaxrs-3.0.1 user guid

Below is my configuration

web.xml

  <context-param>

      <param-name>resteasy.jndi.resources</param-name>

      <param-value>ejb:/JbossRestTest/ModelsFacadeREST!com.bjgoodwill.hip.ets.service.IModlesFacade?stateful</param-value>

   </context-param>

   <servlet>

        <servlet-name>Resteasy</servlet-name>

        <servlet-class>

            org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher

        </servlet-class>

    </servlet>

    <servlet-mapping>

        <servlet-name>Resteasy</servlet-name>

        <url-pattern>/*</url-pattern>

    </servlet-mapping>

      <context-param>

     <param-name>resteasy.scan</param-name>

     <param-value>true</param-value>

  </context-param>

my service code

@Stateful

public class ModelsFacadeREST  extends AbstractFacade<Models> implements IModlesFacade{

   @PersistenceContext(unitName = "PU2")

      private EntityManager em;

    public ModelsFacadeREST() {

           super(Models.class);

    }

    @Override

    protected EntityManager getEntityManager() {

       return em;

    }

}

@Remote

@Path("/com.bjgoodwill.hip.ets.models")

public interface IModlesFacade {

       @GET

       @Produces({"application/xml", "application/json"})

    public List<Models> findAll();

}

public abstract class AbstractFacade<T> {

    private Class<T> entityClass;

    public AbstractFacade(Class<T> entityClass) {

        this.entityClass = entityClass;

    }

    protected abstract EntityManager getEntityManager();

    public List<T> findAll() {

        javax.persistence.criteria.CriteriaQuery cq = getEntityManager().getCriteriaBuilder().createQuery();

        cq.select(cq.from(entityClass));

        return getEntityManager().createQuery(cq).getResultList();

    }

}

@Entity

@Table(name = "et_models")

@XmlRootElement

public class Models implements Serializable {

    private static final long serialVersionUID = 1L;

    @Id

    @Basic(optional = false)

    @Column(name = "model_name")

    private String modelName;

     .....................................................

    @OneToMany(mappedBy = "modelName",fetch=FetchType.EAGER)

    @XmlElement(name="codingSchemesList")

    private List<CodingSchemes> codingSchemesList;

    public Models() {

    }

    public Models(String modelName) {

        this.modelName = modelName;

    }

when i  visiite http://127.0.0.1:8080/JbossRestTest/com.bjgoodwill.hip.ets.models

it Submitted to the wrong

HTTP Status 500 - org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: com.bjgoodwill.hip.ets.CodingSchemes.versionsList, no session or session was closed

I don't understand the reasons and how handle this probelm.thanks you can eamil me [e-mail] thanks very much thanks