Gavin King ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) *commented* on HHH-15737 ( https://hibernate.atlassian.net/browse/HHH-15737?atlOrigin=eyJpIjoiNmI4YT... ) Re: Support for Inheritance and Bytecode Enchanced Lazy Loading ( https://hibernate.atlassian.net/browse/HHH-15737?atlOrigin=eyJpIjoiNmI4YT... ) IMO, the real problem here is that @ManyToOne(fetch=LAZY) @LazyToOne(NO_PROXY) is a combination we just don’t support for polymorphic associations (and have never ever supported). The previous behavior was to ignore fetch=LAZY , and give priority to NO_PROXY which was, well, better than the current behavior of ignoring NO_PROXY , since fetch is defines as a hint. But I think that what should actually happen here is that we should throw, with a clear and helpful error message, since the mapping isn’t supported, and accepting it is misleading. ( https://hibernate.atlassian.net/browse/HHH-15737#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-15737#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#100210- sha1:9b34d7c )