Nathan Xu ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) *commented* on HHH-13882 ( https://hibernate.atlassian.net/browse/HHH-13882?atlOrigin=eyJpIjoiNzI0OT... ) Re: NullPointerException when using JPA @Lock + @EntityGraph + @ElementCollection ( https://hibernate.atlassian.net/browse/HHH-13882?atlOrigin=eyJpIjoiNzI0OT... ) I investigated a little bit. It seems the root cause is some internal bug that collection from element is registered with class alias ending up with overriding existing entity from element. I’ll create a PR quickly. The bugfix will only be applied to v5.x for v6 has gone through dramatic redesign in the relevant code part. ( https://hibernate.atlassian.net/browse/HHH-13882#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-13882#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#100121- sha1:a2b3dcc )