Andrea Boriero ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) *resolved* as *Fixed* Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiOTM2M2Y1ZWMz... ) / Bug ( https://hibernate.atlassian.net/browse/HHH-16750?atlOrigin=eyJpIjoiOTM2M2... ) HHH-16750 ( https://hibernate.atlassian.net/browse/HHH-16750?atlOrigin=eyJpIjoiOTM2M2... ) ClassCastException when an Entity with an ElementCollection has an EmbeddableId with just one field and Batch is enabled ( https://hibernate.atlassian.net/browse/HHH-16750?atlOrigin=eyJpIjoiOTM2M2... ) Change By: Andrea Boriero ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) Resolution: Fixed Status: In Progress Resolved ( https://hibernate.atlassian.net/browse/HHH-16750#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-16750#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#100226- sha1:c25eebb )