Sanne Grinovero ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) *commented* on HHH-16440 ( https://hibernate.atlassian.net/browse/HHH-16440?atlOrigin=eyJpIjoiMjU2YT... ) Re: Classleak in the BytecodeProviderImpl ( https://hibernate.atlassian.net/browse/HHH-16440?atlOrigin=eyJpIjoiMjU2YT... ) Hi Thorsten Goetzke, great analysis thank you for that. As far as I remember, I’m responsible for clearing those caches on shutdown; you’re right that I was primarily thinking of containers and “regular production” users, in which bootstrap would happen only once. I didn’t think about integration tests. I’m wondering now if we should introduce a special mode for testing, but I suspect people wouldn’t use it; perhaps we shouldn’t reset those caches unless we’re configured to do so? I could recommend to people who maintain the integration framework/Hibernate to set it, but this would be a breaking change which won’t be applied overnight. Do you have any suggestions? Regarding the “fastClass not being cached” - I’m not sure I understand why it should be cached; could you elaborate please? ( https://hibernate.atlassian.net/browse/HHH-16440#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-16440#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#100228- sha1:e911e2c )