Jan Schatteman ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) *commented* on HHH-16249 ( https://hibernate.atlassian.net/browse/HHH-16249?atlOrigin=eyJpIjoiYmIzZT... ) Re: StatelessSession does not flush when using jdbc batch_size > 1 ( https://hibernate.atlassian.net/browse/HHH-16249?atlOrigin=eyJpIjoiYmIzZT... ) OK, it’s true that there is no hard requirement to use a transaction, but I will go out on a limb here and state that Hibernate strongly suggests that applications always use transactions. Technically though, you are right, we should finish any currently ‘open’ batch, so we’ll be providing a fix for that. Thanks for the reproducer. ( https://hibernate.atlassian.net/browse/HHH-16249#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-16249#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- sha1:45db922 )