Hibernate cannot merge and persist two instances of entity class

Question

When I try to update Team Hibernate throws exception:

    Multiple representations of the same entity [Team#1] are being merged.
 Detached: [Team@49a0aef3]; Managed: [Team@bf505c]

TeamDAOImpl

    public void updateTeam(Team team) {
            Team teamToUpdate = getTeam(team.getId());
            teamToUpdate.setName(team.getName());
            team = null; // doesn't help to avoid exception
            getCurrentSession().merge(teamToUpdate);
        }
    public Team getTeam(int id) {
        Team team = (Team) getCurrentSession().get(Team.class, id);
        return team;
    }

I have seen most issues related to this exception but haven't found solution that works. How to fix it?

Update:

It seems to be some kind of bug the Hibernate team had to fix. In my case the logic is extremely trivial, I cannot believe Hibernate unable to update current entity. There has to be a way.

I think getCurrentSession().get(Team.class, id) point the same object with a different location. Try to create a new instance of team, as follow: Team team = new Team(); and tell me — Joe Taras, Feb 22 '15 at 19:52
In getTeam method, instead Team team = (Team) getCurrentSession().get(Team.class, id); write: Team team = new Team(); — Joe Taras, Feb 22 '15 at 20:15

score 1 · Answer 1 · answered Apr 03 '17 at 09:58

1

Fixed it by removing CascadeType from source entity.

answered Apr 03 '17 at 09:58

Sarang

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I spent hours trying to solve this problem. Thank you for the hint. – Mohamed Ennahdi El Idrissi Sep 05 '18 at 21:52

Hibernate cannot merge and persist two instances of entity class

1 Answers1