Could not obtain transaction-synchronized session for current thread.

Question

Problem :

I am beginner to spring + hibernate. Recently I have created the application with the use of spring + hibernate but I always face below error. I am trying to work on it for the very first time.

Below is the error for your reference:

INFO: HHH000397: Using ASTQueryTranslatorFactory
Exception in thread "main" org.hibernate.HibernateException: Could not obtain transaction-synchronized Session for current thread
at org.springframework.orm.hibernate4.SpringSessionContext.currentSession(SpringSessionContext.java:134)
at org.hibernate.internal.SessionFactoryImpl.getCurrentSession(SessionFactoryImpl.java:1014)
at coreservlets.StudentDAOImpl.create(StudentDAOImpl.java:19)
at coreservlets.MainApp.main(MainApp.java:14)

Can somebody help me in overcoming above error?

Answer 1

I like answering questions based on  spring + hibernate so I am trying to help you in fixing your mentioned error.

I had also faced the same issue in the past it was in the class which was not the part of any service layer. My transaction manager was very easily obtained from a context by my getBean() method and also my class belonged to a view layer and the project was utilizing the OpenSessionInView technique.

In my case my sessionFactory.getCurrentSession() method was causing the same exception as yours. And solution for it is very simple as given below for your reference.

Session session;

try {
    mysession = sessionFactory.getCurrentSession();
} catch (HibernateException mye) {
    mysession = sessionFactory.openSession();
}

If by any chance the getCurrentSession() method fails for you then the openSession() should do the work for you..

Comments

this opensession causes performance problem and it will not work as expected when you have saveOrUpdate() method, it will not update records into DB as expected. It is not a good fix. I dont know how to fix this still i m searching , if any good way. please share.