Tomas Cerskus ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=5f3fc10... ) *updated* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiMjA3YzcyYTQw... ) / Bug ( https://hibernate.atlassian.net/browse/HHH-16136?atlOrigin=eyJpIjoiMjA3Yz... ) HHH-16136 ( https://hibernate.atlassian.net/browse/HHH-16136?atlOrigin=eyJpIjoiMjA3Yz... ) LAZY @ManyToOne may break EAGER @ManyToOne when used on the same entity in a different parent with Bytecode Enhancement ( https://hibernate.atlassian.net/browse/HHH-16136?atlOrigin=eyJpIjoiMjA3Yz... ) Change By: Tomas Cerskus ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=5f3fc10... ) Say I have the following entities {noformat}User { @Id id: String name: String } Order { @Id id: String @ManyToOne(fetch = FetchType.EAGER) @JoinColumn user: User // Meant to be different from Order.user // This extra field makes Hibernate use several queries when fetching which then leads to this bug @ManyToOne(fetch = FetchType.EAGER) @JoinColumn targetUser: User @OneToMany(targetEntity=OrderItem.class, mappedBy="order", fetch=FetchType.EAGER) orderItems: Set<OrderItem> } OrderItem { @Id id: String @ManyToOne(fetch = FetchType.LAZY) @JoinColumn order: Order // Same as Order.user // Note that unlike Order.user, here it is LAZY @ManyToOne(fetch = FetchType.LAZY) @JoinColumn user: User }{noformat} Fetching a single entity works well and returns an Order with all the relationships populated. But fetching multiple entities returns Order with Order.user not initialised. This issue is present with - and without - bytecode enhancement. -I’ll add a PR with a test case shortly.- - done ( https://hibernate.atlassian.net/browse/HHH-16136#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-16136#add-comment?atlOrigin=ey... ) Get Jira notifications on your phone! Download the Jira Cloud app for Android ( https://play.google.com/store/apps/details?id=com.atlassian.android.jira.... ) or iOS ( https://itunes.apple.com/app/apple-store/id1006972087?pt=696495&ct=Em... ) This message was sent by Atlassian Jira (v1001.0.0-SNAPSHOT#100214- sha1:6795dbd )