org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role while using Javers

Question

I'm getting the error: org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: com.fleetx.persistence.model.Account.users, could not initialize proxy - no Session

when I try to do a create operation on one of the entities I'm trying to audit using Javers. The following is the structure of my application:

AudityEntity.java

@Data
@Entity
@Table
public class AuditEntity extends Base {
    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "account_id", updatable = false)
    @JsonIgnore
    private Account account;

    // other fields
}

Account.java

@Data
@Entity
@Table
public class Account extends Base {
    @OneToMany(mappedBy = "account", fetch = FetchType.LAZY, cascade = CascadeType.ALL)
    @JsonIgnore
    private List<User> users;

    // other fields
}

AuditEntityRepository.java

@JaversSpringDataAuditable
public interface AuditEntityRepository extends JpaRepository<AuditEntityRepository, Long> {
    // crud operations
}

I don't want to change the fetch type of private Account account; or private List<User> users; to FetchType.EAGER .

Any help would be appreciated. Thankyou.

Answer 1

If you don't want to change to FetchType.EAGER then wherever you are accessing Account.getUsers() needs to be in a transaction so the Hibernate Session isn't discarded. The easiest way to do this is to add the @Transactional to the method of the service or bean where the fetching and getUsers() access is being done. Make sure Transactions are turned on with @EnableTransactionManagement .