org.postgresql.util.PSQLException: Large Objects may not be used in auto-commit mode

Question

I am using Spring , JPA, Hibernate, Postgresql. I can upload/insert a file to the database. But I got the error when tried to access the file.

EVERE: Servle         


        

Answer 1

Since you have defined your Spring transactions via @Transactional, you are by default running inside of an auto-commit transaction. As per this other thread, you need to create a second session factory which runs in autocommit = false to retrieve the file.

Additionally, the DAO for the retrieval should be annotated with @Qualifier so that it knows which session factory to use. Example:

@Autowired
public MyDAOImpl(@Qualifier("someSessionFactory") SessionFactory sessionFactory) {
   setSessionFactory(sessionFactory);
}