Hibernate throwing ConcurrentModificationException with an embedded ElementCollection

Question

I\'m running Hibernate 4.2.6.Final / JPA2 and trying to have an @ElementCollection List of @Embeddable objects which themselves contain an @ElementCollection List of String.

Answer 1

This an issue that was already reported to Hibernate developers and no fix is scheduled! Sorry. See https://hibernate.atlassian.net/browse/HHH-4313.

Answer 2

I spent some time digging around a little more and found this similar issue on SO which in turn references this Jira issue:

ConcurrentModificationException when collection of embeddable contains a collection

It was already raised in 2007, but to date nothing has been implemented for it.

Workaround at the moment is to make Address into an Entity, but maintain the lifecycle through User.