JPA Bug !?

Question

Hi,
I'm building a web shop using JPA.
A couple of my entities are Category(as in category of items) and Item. Here is a minimized code preview :
@Entity
@Table(name = "category")
@NamedQueries(....)
public class Category implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Basic(optional = true, fetch = FetchType.EAGER)
@Column(name = "categoryId")
private Integer categoryId;
@OneToMany(mappedBy = "categoryId", cascade = CascadeType.REMOVE)
private List<Item> itemCollection;
@Entity
@Table(name = "item")
@NamedQueries(....)
public class Item implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Basic(optional = true, fetch = FetchType.EAGER)
@Column(name = "itemId")
private Integer itemId;
@JoinColumn(name = "categoryId", referencedColumnName = "categoryId", updatable=true)
@ManyToOne(cascade = {CascadeType.PERSIST, CascadeType.MERGE, CascadeType.REMOVE})
private Category categoryId;
Now my problem is that, after creating a new Item, this method doesn't return it :
public List<Item> getItemsByCategory(int categoryId) {
Category category = (Category)entityManager.createNamedQuery("Category.findByCategoryId").setParameter("categoryId", categoryId).getSingleResult();
List<Item> itemsOfThisCat = category.getItemCollection();
return itemsOfThisCat;
Just to make it clear, there is no error, the newly created Item is in db, but it is returned by the above method only if restart the server or redeploy the application !!!!?
I have this problem both for TopLink and OpenJPA, and I am completing the entire project by my self, from the web design to the db optimization, so I could really use a good and concise advice.
Cheers,
Cristi

Answer 1

I found it natural that JPA will add by itself a newly created Item to the List<Item> of the Category entity.
I hate it when I get stuck in such small issues, thank u so much for your reply.