org.hibernate.TransactionException: Transaction not successfully started

[Bai Shen]

I keep getting this exception and I'm not sure why.

I have a servlet that gets an object from the database using hibernate and places it in the web session. Then later, another servlet retrieves the object from the web session, modifies it, and saves it back to the database using hibernate.

ObjectOne o1 = (ObjectOne)req.getSession().getAttribute("objectOne");
Session s = HibernateUtil.getSessionFactory().getCurrentSession();
ObjectOne o2 = (ObjectOne)s.load(ObjectOne.class, o1.getID());

After the o2 assignment, I set some values, call save, and then commit. However, it never runs those AFAIK. I have a log statement before and after the load command, and only the one before gets called.

I tried it without the load statement, but then I get an error during the save.

Any ideas what I'm doing wrong? Should I just do a query instead of the load?

[Cameron Wallace McKenzie]

You need to both start and commit your transaction.

session.beginTransaction();

session.getTransaction().commit();

   Session session = factory.getCurrentSession();
session.beginTransaction();
/* create & initialize your User POJO */
User u = new User();
u.setPassword("abc123");

/* at this point, the User instance 
is still transient */

/* ask the session to save your 
POJO to the db*/

session.saveOrUpdate(u); 
/*at this point, the User instance 
is considered persistent*/

session.getTransaction().commit(); 

Introductory Hibernate Tutorial

-Cameron McKenzie

[Bai Shen]

Hmm. I could have sworn I originally had it set up that way and it didn't work.

I'm not sure what I did wrong, but by adding a beginTransaction call, everything seems to be working now. Thanks.