tomas ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=5f3fc10... ) *created* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiNTc0MTZjNzFi... ) / Bug ( https://hibernate.atlassian.net/browse/HHH-16136?atlOrigin=eyJpIjoiNTc0MT... ) HHH-16136 ( https://hibernate.atlassian.net/browse/HHH-16136?atlOrigin=eyJpIjoiNTc0MT... ) LAZY @ManyToOne may break EAGER @ManyToOne when used on the same entity in a different parent ( https://hibernate.atlassian.net/browse/HHH-16136?atlOrigin=eyJpIjoiNTc0MT... ) Issue Type: Bug Affects Versions: 6.2.0.CR2, 6.1.6 Assignee: Unassigned Created: 04/Feb/2023 04:54 AM Priority: Major Reporter: tomas ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=5f3fc10... ) Say I have the following entities 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 } 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. ( 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- sha1:6115380 )