[hibernate-issues] [JIRA] (HHH-15529) Cannot override non-identifier propety from @MappedSuperclass and make it identifier in subclass

JohannesMartin ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) *updated* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiMDcxYzUyNTdi... ) / Bug ( https://hibernate.atlassian.net/browse/HHH-15529?atlOrigin=eyJpIjoiMDcxYz... ) HHH-15529 ( https://hibernate.atlassian.net/browse/HHH-15529?atlOrigin=eyJpIjoiMDcxYz... ) Cannot override non-identifier propety from @MappedSuperclass and make it identifier in subclass ( https://hibernate.atlassian.net/browse/HHH-15529?atlOrigin=eyJpIjoiMDcxYz... ) Change By: JohannesMartin ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) I’ve got a @MappedSuperClass A defining field testA as non-identifier. Class B extends Class A, defining additional field testB. Class B annotates both field testA and field testB with @Id. At runtime, hibernate 5.6.11 complains: org.hibernate.MappingException: You cannot override the \[testA] non-identifier property from the \[sample.entities.A] base class or @MappedSuperclass and make it an identifier in the \[sample.entities.B] subclass\! Earlier versions just silently ignore the @Id annotation on testA. If I annotate testA as @Id in the MappedSuperclass, the code runs fine, but this violates JPA spec (JPA 2.1 [http://download.oracle.com/otndocs/jcp/persistence-2_1-fr-eval-spec|http:... Chapter 2.4): {quote}The primary key must be defined on the entity class that is the root of the entity hierarchy or on a mapped superclass that is a (direct or indirect) superclass of all entity classes in the entity hierarchy. The primary key must be defined exactly once in an entity hierarchy.{quote} Why does hibernate handle things like this? Is there a way around it. ? ( https://hibernate.atlassian.net/browse/HHH-15529#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-15529#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#100207- sha1:1c92a42 )