Felix König ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=5a4bad5... ) *commented* on HHH-4042 ( https://hibernate.atlassian.net/browse/HHH-4042?atlOrigin=eyJpIjoiOTY1MTI... ) Re: StatelessSession does not flush when using jdbc batch_size > 1 ( https://hibernate.atlassian.net/browse/HHH-4042?atlOrigin=eyJpIjoiOTY1MTI... ) This is still a problem and source of potential data loss in hibernate 6.1.7. For my case, which is Spring Boot, I’ve implemented this workaround: @Service public class StatelessSessionRunner { private final Session session; public StatelessSessionRunner(Session session) { this.session = session; } public <T> T runWithStatelessSession(Function<StatelessSession, T> func) { return session.doReturningWork(connection -> { try (StatelessSession statelessSession = session.getSessionFactory().openStatelessSession(connection)) { var result = func.apply(statelessSession); // workaround for https://hibernate.atlassian.net/browse/HHH-4042 ((SharedSessionContractImplementor) statelessSession).getJdbcCoordinator().executeBatch(); return result; } }); } } Which allows you to perform some operations using a stateless session within a larger transaction. ( https://hibernate.atlassian.net/browse/HHH-4042#add-comment?atlOrigin=eyJ... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-4042#add-comment?atlOrigin=eyJ... ) 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- sha1:65be9f2 )