hi, I deployed my app to jboss, but something wrong happen:
 

2007-05-18 22:16:57,843 DEBUG [org.jboss.ejb3.ServiceDelegateWrapper] Starting failed persistence.units:ear=favorites.ear,jar=favoritesEJB.jar,unitName=favorites
java.lang.NullPointerException
 at org.hibernate.cfg.OneToOneSecondPass.doSecondPass (OneToOneSecondPass.java:135)
 at org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:1130)
 at org.hibernate.cfg.AnnotationConfiguration.secondPassCompile(AnnotationConfiguration.java:296)
 at org.hibernate.cfg.Configuration.buildMappings (Configuration.java:1115)
 
 
--- MBeans waiting for other MBeans ---
ObjectName: persistence.units:ear=favorites.ear,jar=favoritesEJB.jar,unitName=favorites
  State: FAILED
  Reason: java.lang.NullPointerException
  I Depend On:
    jboss.jca:service=DataSourceBinding,name=DefaultDS
  Depends On Me:
    jboss.j2ee:ear=favorites.ear,jar=favoritesEJB.jar,name=AddressFacade,service=EJB3
    jboss.j2ee:ear=favorites.ear ,jar=favoritesEJB.jar,name=AdminFacade,service=EJB3
    jboss.j2ee:ear=favorites.ear,jar=favoritesEJB.jar,name=CommentFacade,service=EJB3
    jboss.j2ee:ear=favorites.ear,jar=favoritesEJB.jar,name=FavoritesDirectoryFacade,service=EJB3
    jboss.j2ee:ear=favorites.ear,jar=favoritesEJB.jar,name=FavoritesFacade,service=EJB3
    jboss.j2ee:ear=favorites.ear,jar=favoritesEJB.jar,name=PermissionFacade,service=EJB3
    jboss.j2ee:ear=favorites.ear,jar= favoritesEJB.jar,name=RoleFacade,service=EJB3
    jboss.j2ee:ear=favorites.ear,jar=favoritesEJB.jar,name=SiteFacade,service=EJB3
    jboss.j2ee:ear=favorites.ear,jar=favoritesEJB.jar,name=TagFacade,service=EJB3
    jboss.j2ee:ear=favorites.ear,jar=favoritesEJB.jar,name=UsersFacade,service=EJB3
    jboss.j2ee:ear=favorites.ear,jar=favoritesEJB.jar,name=UserSiteFacade,service=EJB3

--- MBEANS THAT ARE THE ROOT CAUSE OF THE PROBLEM ---
ObjectName: persistence.units:ear=favorites.ear,jar=favoritesEJB.jar,unitName=favorites
  State: FAILED
  Reason: java.lang.NullPointerException
  I Depend On:
    jboss.jca:service=DataSourceBinding,name=DefaultDS
  Depends On Me:
    jboss.j2ee:ear=favorites.ear,jar=favoritesEJB.jar,name=AddressFacade,service=EJB3
    jboss.j2ee:ear=favorites.ear,jar=favoritesEJB.jar ,name=AdminFacade,service=EJB3
    jboss.j2ee:ear=favorites.ear,jar=favoritesEJB.jar,name=CommentFacade,service=EJB3
    jboss.j2ee:ear=favorites.ear,jar=favoritesEJB.jar,name=FavoritesDirectoryFacade,service=EJB3
    jboss.j2ee:ear=favorites.ear,jar=favoritesEJB.jar,name=FavoritesFacade,service=EJB3
    jboss.j2ee:ear=favorites.ear,jar=favoritesEJB.jar,name=PermissionFacade,service=EJB3
    jboss.j2ee:ear=favorites.ear,jar=favoritesEJB.jar ,name=RoleFacade,service=EJB3
    jboss.j2ee:ear=favorites.ear,jar=favoritesEJB.jar,name=SiteFacade,service=EJB3
    jboss.j2ee:ear=favorites.ear,jar=favoritesEJB.jar,name=TagFacade,service=EJB3
    jboss.j2ee:ear=favorites.ear ,jar=favoritesEJB.jar,name=UsersFacade,service=EJB3
    jboss.j2ee:ear=favorites.ear,jar=favoritesEJB.jar,name=UserSiteFacade,service=EJB3

here is my code:
@Entity
@Table(name = "users", catalog = "favorites", uniqueConstraints = {})
public class Users implements java.io.Serializable {
 private Set<UserSite> userSites = new HashSet<UserSite>(0);
//...
 @OneToMany(cascade = { CascadeType.ALL }, fetch = FetchType.LAZY, mappedBy = "users")
 public Set<UserSite> getUserSites() {
  return this.userSites;
 }

 public void setUserSites(Set<UserSite> userSites) {
  this.userSites = userSites;
 }

}

@Entity
@Table(name = "user_site", catalog = "favorites", uniqueConstraints = {})
public class UserSite implements java.io.Serializable {

 private Users users;
//...
 @ManyToOne(cascade = {}, fetch = FetchType.LAZY)
 @JoinColumn(name = "userId", unique = false, nullable = false, insertable = true, updatable = true)
 public Users getUsers() {
  return this.users;
 }

 public void setUsers(Users users) {
  this.users = users;
 }
}

any advise?