Error Msg: org.hibernate.NonUniqueObjectException: a different object with the same identifier value was already associated with the session

Question

try {
        final CHEMRFacilityMedicalEquipment medicalequ = m_chemrFacilityMedicalEquipmentManagementBO
                .findCHEMRFacilityMedicalEquipmentById(id);
        final CHEMRFacilityMedicalEquipment updateMed = new CHEMRFacilityMedicalEquipment();
        if (medicalequ.getMetaStatus() == true) {
            updateMed.setId(medicalequ.getId());
            updateMed.setMetaStatus(false);
            m_chemrFacilityMedicalEquipmentManagementBO
                    .updateCHEMRFacilityMedicalEquipment(updateMed);
            return true;
        }
        return false;
    }

Above is how I am Calling my method in DaOImpl

try {
        m_sessionFactory.getCurrentSession().update(instance);
    } catch (final DataAccessException _e) {
        M_LOG.debug("Update object failed:" + _e.toString());
        throw new CHEMRDAOException(_e.toString());
    } catch (final Exception _e) {
        M_LOG.debug("Update object failed:" + _e.toString());
        throw new CHEMRDAOException(_e.toString());
    }
}

DAO Impimentation

I am trying to update my Object and sending it through the update mehtod to Update data in table. While I am calling update method it returns "a different object with the same identifier value was already associated with the session" Not getting what exactly the problem is.

Please provide the full stack trace. And it also looks suspicious that you try to update updateMed.setId. You should not do it. — SternK

Fevly Pallar Fevly Pallar · Accepted Answer · 2019-12-19T11:59:45

It could be that your session is currently handling 2 different objects with the same identifier (their ids). For ex.

CHEMRFacilityMedicalEquipment updateMed = new CHEMRFacilityMedicalEquipment();
updateMed.setId(1);
student.setName("Mukesh");

updateMed = new CHEMRFacilityMedicalEquipment();
updateMed.setId(1);
student.setName("Ryan");

Then suppose this statement is invoked

m_sessionFactory.getCurrentSession().save(updateMed );

and while the session for that instance hasn't been closed (committed) yet, the instance is still in a persistant state but somehow your session trying to manage another different instance with a same identifier (id) through another :

m_sessionFactory.getCurrentSession().save(updateMed );

m_sessionFactory.getCurrentSession().close();

Also, these 2 following lines look suspicious to me

 final CHEMRFacilityMedicalEquipment medicalequ = m_chemrFacilityMedicalEquipmentManagementBO
                .findCHEMRFacilityMedicalEquipmentById(id);
 final CHEMRFacilityMedicalEquipment updateMed = new CHEMRFacilityMedicalEquipment();

If could be that your session currently handling those instances with a same identifier (id in this case). I think you can figure it out yourself, because there can't currently much information be extracted from your code.

Error Msg: org.hibernate.NonUniqueObjectException: a different object with the same identifier value was already associated with the session

1 Answers