Andrea Boriero ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) *commented* on HHH-16825 ( https://hibernate.atlassian.net/browse/HHH-16825?atlOrigin=eyJpIjoiMjZkMj... ) Re: Cascading an entity with a composite key causes NullPointerException in AbstractClassJavaType.extractHashCode ( https://hibernate.atlassian.net/browse/HHH-16825?atlOrigin=eyJpIjoiMjZkMj... ) Hi Tomáš Müller ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=5b50823... ) , i tried your test with Hibernate 4.3.11 and it throws java.lang.NullPointerException: Cannot invoke "Object.hashCode()" because "value" is null ( https://hibernate.atlassian.net/browse/HHH-16825#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-16825#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#100232- sha1:1e691fe )