[hibernate-issues] [JIRA] (HHH-16555) Join fetch query in combination with the inheritance pattern not working in hibernate 6

Finn ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=712020%... ) *created* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiMzgzNDZiZWE5... ) / Bug ( https://hibernate.atlassian.net/browse/HHH-16555?atlOrigin=eyJpIjoiMzgzND... ) HHH-16555 ( https://hibernate.atlassian.net/browse/HHH-16555?atlOrigin=eyJpIjoiMzgzND... ) Join fetch query in combination with the inheritance pattern not working in hibernate 6 ( https://hibernate.atlassian.net/browse/HHH-16555?atlOrigin=eyJpIjoiMzgzND... ) Issue Type: Bug Affects Versions: 6.2.2 Assignee: Unassigned Attachments: HibernateTicket.png Components: query-hql Created: 05/May/2023 01:20 AM Priority: Major Reporter: Finn ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=712020%... ) I’m using the following entity structure with the inheritance pattern. ( https://hibernate.atlassian.net/secure/attachment/50339/50339_HibernateTi... ) I want so select all *animals* and load all *kittens* as well if the animal is a cat. I’m using the following query to load alls animals. select animal from Animal animal left join fetch animal.kittens In Hibernate 5 all *kittens* are loaded as expected. After the upgrade to hibernate 6 I get a *LazyInitializationException* on accessing the *kittens* Testcase https://github.com/finn0s/hibernate-test-case-templates ( https://hibernate.atlassian.net/browse/HHH-16555#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-16555#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#100225- sha1:f83bc8f )