As of the latest Grouper 2.6 release, the migration utility is apparently failing calling an unsupported Hibernate method. I'll include the stack trace in a comment. The method is org.hibernate.SessionFactory.getAllClassMetadata, which was deprecated for a while and I guess is now defunct.

The migration tool worked great moving a test instance from MySQL to Postgres when used it last year in an older 2.6 release, so I guess Hibernate was bumped. Maybe one option if I have to hack around it would be to throw an older set of jars into lib just to get the tool to run, but I was hoping there might be a real fix.

I know the tool is maybe not viewed as 100% reliable, but it was definitely very helpful for me at the time, so if it's still supported, I figured I would ask.