When multiple environment files are specified, combine them in the engine instead of the client. This will give Heat enough information to do the Right Thing on PATCH updates. Blueprint: * https://blueprints.launchpad.net/heat/+spec/multi-environments
I will be confident to mark this one as verified after successful upgrades and updates as well.
Since this cannot be tested by a user, I had to wait until enough time and testing was done. regular testing on heat in osp9 and also upgrading from 8 to 9 and running tests post upgrades are enough to convince me that this new feature is working well.
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://rhn.redhat.com/errata/RHEA-2016-1597.html