如何解决作用域类型javax.enterprise.context.SessionScoped问题的无活动上下文问题

Question

我对CDI SessionScoped Bean有问题。我有一个扩展抽象控制器的控制器。当我尝试启动应用程序时，发生错误

WELD-001303：作用域类型没有活动上下文 javax.enterprise.context.SessionScoped.

@Named
@SessionScoped
public class UserController extends CatalogController implements    Serializable {
private static final long serialVersionUID = 5818789812426336142L;
public UserController() {
    super(User.class);
}}
public abstract class CatalogController<T> implements Serializable {
private static final long serialVersionUID = 2354059049000471596L;
@Inject
private CatalogService catalogService;
private Class<T> itemType; 
private Catalog newItem;
private Catalog selectedItem;
private List<Catalog> items;     
public CatalogController() {
} 
public CatalogController(Class<T> itemType) {
    this.itemType = itemType;
    newItemInstance();  
} 

@PostConstruct
public void init() {
    //items = catalogService.getAll();     
}

这是我的服务课。

public class CatalogService extends DataAccessService<Catalog> implements Serializable {
private static final long serialVersionUID = 5294530753916464146L;

public CatalogService() {
    super(Catalog.class);
}     
}

Answer 1

我发现此错误与玻璃鱼服务器之间存在稳定关系。重新启动服务器后，此错误会消失，但是当我尝试更改代码时，例如在UserController中，错误再次发生。