Marcus Ilgner ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=608faf0... ) *commented* on HCANN-128 ( https://hibernate.atlassian.net/browse/HCANN-128?atlOrigin=eyJpIjoiZjVmYm... ) Re: Reflection does not use ClassLoaderService ( https://hibernate.atlassian.net/browse/HCANN-128?atlOrigin=eyJpIjoiZjVmYm... ) I’m not sure I understand what the issue might be, unfortunately. In the meantime I have managed to work around this by loading the class through a different classloader. So it’s not acute for me and if it doesn’t cause any issues for anyone else, feel free to close this. The error message was just a NoClassDefFound with the name of the class used in the property with the ManyToOne association. ( https://hibernate.atlassian.net/browse/HCANN-128#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HCANN-128#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#100217- sha1:f4229d0 )