Java 11: Issues with Lazy Initialization of Hibernate Entities Causing NullPointerException
I'm stuck trying to I've been researching this but I'm encountering a `NullPointerException` when trying to access lazily-initialized properties of my Hibernate entities. I have a `User` entity that has a `@OneToMany` relationship with an `Order` entity. The `List<Order>` in the `User` class is annotated with `@OneToMany(fetch = FetchType.LAZY)`. When I try to retrieve the orders in my service layer, the collection is not initialized, leading to the exception. I've checked that the session is still open while accessing the property, but I'm still facing this issue. Here’s a snippet of my code: ```java @Entity public class User { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) private Long id; @OneToMany(mappedBy = "user", fetch = FetchType.LAZY) private List<Order> orders; // getters and setters } ``` And in my service class: ```java @Service public class UserService { @Autowired private UserRepository userRepository; public List<Order> getUserOrders(Long userId) { User user = userRepository.findById(userId).orElseThrow(() -> new RuntimeException("User not found")); return user.getOrders(); // This line throws NullPointerException } } ``` I also ensured that I am using the same session to retrieve the user and access its orders. I tried enabling Hibernate’s `hibernate.enable_lazy_load_no_trans` property to see if that would help, but it didn’t resolve the issue. Is there a specific configuration or best practice I might be missing to handle lazy loading properly in this scenario? I'm developing on Windows 10 with Java. Is there a simpler solution I'm overlooking? What are your experiences with this?