Hello all!

I am using Hibernate and getting

Exception in thread "main" org.hibernate.ObjectNotFoundException: No row with the given identifier exists: [<MyDbObject>#271]

What is pretty weird about this error is, that the object with the given id exists in the database. I inserted the problematic record in another run of the application. If I access it in the same run (i.e. same hibernate session) there seem to be no problems retrieving the data.

Just because it could be a fault of the mapping:

public class ProblemClass {
  @ManyToOne(optional = false)
  private MyDbObject myDbObject;
}
public class MyDbObject {
  @OneToMany(mappedBy = "myDbObject")
  private List<ProblemClass> problemClasses;
}

I have absolutely no clue even where to look at. Any hints highly appreciated!