Github user michaelandrepearce commented on the issue: https://github.com/apache/activemq-artemis/pull/1793 Really need PR build to be green. Maybe re-push with a comment update to get try trigger another build. Seems some methods have been still left in-implemented. Also could/should look to use string to SimpleString pools. Lastly have you checked that this persists to disk and is recoverable without converting to core.