@OrderColumn on a generic collection type fails at entityManagerFactory startup with a NPE :

Caused by: java.lang.NullPointerException: Cannot invoke "org.hibernate.annotations.common.reflection.XClass.getName()" because the return value of "org.hibernate.annotations.common.reflection.XProperty.getMapKey()" is null
	at org.hibernate.boot.model.internal.ClassPropertyHolder$1.doSecondPass(ClassPropertyHolder.java:312)
	at org.hibernate.boot.internal.InFlightMetadataCollectorImpl.processSecondPasses(InFlightMetadataCollectorImpl.java:1846)
	at org.hibernate.boot.internal.InFlightMetadataCollectorImpl.processSecondPasses(InFlightMetadataCollectorImpl.java:1803)

Collection declaration :

(in abstract)
...
	@OneToMany(mappedBy="withGeneric")
	@OrderColumn
	public List<T> targets;
...

Generic type is setup in concrete class.

This pattern used to work with Hibernate (works for Hibernate 5.6.15, and previous versions).

A minimal test-case based on https://github.com/hibernate/hibernate-test-case-templates is coming.

There is an existing ticket already open with a similar error https://hibernate.atlassian.net/browse/HHH-16562 but :

• it does not imply a generic collection
• my minimal test case shows that a non-generic @OneToMany collection is OK

I’ll post my github repository with a minimal test-case in a few minutes.