EntityManager.merge not doing anything
Try the em.flush() also after the em.merge(). Sometimes the EntityManager just keeps the the changes for updating later.
EntityManager autocommit is false. Please use transaction like below;
EntityManager em = null;EntityTransaction t = null;try { em = emf.createEntityManager(); t = em.getTransaction(); t.begin(); em.merge(myTestObject); t.commit();} catch (Exception e) { t.rollback(); throw new RuntimeException(e.getMessage());}finally{ if(em != null) em.close();}
I had the very issue and got resolved by changing the scope.
@PersistenceContext(type=PersistenceContextType.EXTENDED)