Sometimes during RabbitMQ startup this message pops up. We indeed don't support upgrades in this library, because it's stateless, so no state has to survive during upgrades.
Although this message is harmless, it's a constant source of confusion. Let's fix it by adding stub upgrade function, and thus suppressing it.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://access.redhat.com/errata/RHBA-2017:1473