NonUniqueObjectException again

elendal · **Posted:** Mon Aug 30, 2004 3:55 am

Hibernate version:
hibernate-2.1.3

Mapping documents:
<hibernate-mapping>
<class name="com.jff.bo.UserBean" table="users" lazy="true">
<cache usage="read-write"/>
<id name="user_id" type="int">
<generator class="native"/>
</id>
<many-to-one name="role" class="com.jff.bo.RoleBean" column="role_id_fk"/>
<property name="login" column="login" type="string" update="false" not-null="true" unique="true"/>
<property name="password" column="password" type="string" not-null="true"/>
<property name="registration_date" column="registration_date" type="timestamp" update="false" />
</class>
</hibernate-mapping>

Code between sessionFactory.openSession() and session.close():
First i call to:

Code:

    public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {
        UserBean sessionUser = sessionMgr.getSessionUser(httpServletRequest.getSession(true));
        if (sessionUser != null) {
            userService.reattach(sessionUser);
            modelAndView.addObject("authenticatedUser", sessionUser);
        }
    }

Then from other place:

Code:

    public List getAll() {
        return getHibernateTemplate().loadAll(UserBean.class);
    }

Full stack trace of any exception that occurs:
net.sf.hibernate.NonUniqueObjectException: a different object with the same identifier value was already associated with the session: 4, of class: com.jff.bo.UserBean
org.springframework.orm.hibernate.SessionFactoryUtils.convertHibernateAccessException(SessionFactoryUtils.java:333)
org.springframework.orm.hibernate.HibernateAccessor.convertHibernateAccessException(HibernateAccessor.java:222)
org.springframework.orm.hibernate.HibernateTemplate.execute(HibernateTemplate.java:155)
org.springframework.orm.hibernate.HibernateTemplate.lock(HibernateTemplate.java:231)
com.jff.service.dao.hibernate.UserBeanDaoImpl.reattach(Unknown Source)
Name and version of the database you are using:
MySQL 4.X

I put UserBean object to HttpServletRequest session, and then reattach it (getHibernateTemplate().lock(user, LockMode.NONE);

But in some situations UserBean object is already attached to Hibernate session and i get NonUniqueObjectException.

So my question is how can i check is object is already attached (beside checking for LazyInit exception).

elendal · **Posted:** Mon Aug 30, 2004 4:15 am

Sorry, small update:

Code between sessionFactory.openSession() and session.close():

First i call to:

Code:

    public List getAll() {
        return getHibernateTemplate().loadAll(UserBean.class);
    } 

Then from other place:

Code:

    public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {
        UserBean sessionUser = sessionMgr.getSessionUser(httpServletRequest.getSession(true));
        if (sessionUser != null) {
            userService.reattach(sessionUser);
            modelAndView.addObject("authenticatedUser", sessionUser);
        }
    }

Full stack trace of any exception that occurs:

Code:

net.sf.hibernate.NonUniqueObjectException: a different object with the same identifier value was already associated with the session: 4, of class: com.jff.bo.UserBean
   org.springframework.orm.hibernate.SessionFactoryUtils.convertHibernateAccessException(SessionFactoryUtils.java:333)
   org.springframework.orm.hibernate.HibernateAccessor.convertHibernateAccessException(HibernateAccessor.java:222)
   org.springframework.orm.hibernate.HibernateTemplate.execute(HibernateTemplate.java:155)
   org.springframework.orm.hibernate.HibernateTemplate.lock(HibernateTemplate.java:231)
   com.jff.service.dao.hibernate.UserBeanDaoImpl.reattach(Unknown Source)
   com.jff.filters.PushUserToViewInterceptor.postHandle(Unknown Source)
   org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:491)
   org.springframework.web.servlet.FrameworkServlet.serviceWrapper(FrameworkServlet.java:342)
   org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:318)
   javax.servlet.http.HttpServlet.service(HttpServlet.java:743)
   javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
   org.springframework.orm.hibernate.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:117)
   org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:73)
   com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:142)
   com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:58)