My COde

Inside USers class implements Serializable

    @OneToOne(fetch=FetchType.EAGER)
    @JoinTable(name = "user_roles", joinColumns = {@JoinColumn(name = "userid")}, inverseJoinColumns = {@JoinColumn(name = "roleid")})
    @JsonManagedReference
    private Roles userroles;
.
Inside Roles class
@Entity
public class Roles implements Serializable {
    /**
     *
     */
    private static final long serialVersionUID = -7186993404873006567L;
    @OneToOne
    @JsonBackReference
    Users userRole;


My DAO code
    @Override
    @Transactional
    public boolean insertUser(Users user) {

        Criteria criteria = sessionFactory.getCurrentSession().createCriteria(Users.class);

        criteria.add(Restrictions.eq("email", user.getEmail()));
        Users temp = (Users) criteria.uniqueResult();


        if (temp == null) {
            user.setEnabled(true);
            Roles userrole = new Roles("USER", user);
            user.setUserRole(userrole);
            userrole.setUsers(user);
            logger.info(user.toString() + "before save");

            sessionFactory.getCurrentSession().save(user);
            logger.info(user.toString() + "after save");
            return true;

        } else {
            logger.info("user is null in insertUser");


            return false;

        }
    }