Davide D'Alto ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) *updated* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiNWM1OWNkMTc1... ) / Bug ( https://hibernate.atlassian.net/browse/HHH-16869?atlOrigin=eyJpIjoiNWM1OW... ) HHH-16869 ( https://hibernate.atlassian.net/browse/HHH-16869?atlOrigin=eyJpIjoiNWM1OW... ) Make the illegal pop error message more user friendly ( https://hibernate.atlassian.net/browse/HHH-16869?atlOrigin=eyJpIjoiNWM1OW... ) Change By: Davide D'Alto ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) When something is wrong with the way the session is used (in a non thread-safe way I think), the following exception is thrown: {code:none}java.lang.IllegalStateException: Illegal pop() with non-matching JdbcValuesSourceProcessingState{code} This is puzzling for users, can we change it to something more user friendly? The error is thrown by [LocalContexts#deregister|https://github.com/hibernate/hibernate-orm/blob/...] It might also be helpful to have an error code for this message. It makes it easier to search it (it can happen quite easily with Hibernate Reactive). ( https://hibernate.atlassian.net/browse/HHH-16869#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-16869#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#100227- sha1:d7f1864 )