I am on Windows central hub and MS SQL as the DB and went 8.31->8.51.
Issues I've run into:
- rules in discovery_server change - hopefully for the better - Expect that if you use USM and haven't yet cleaned up from the 8.31 GA discovery_server, you will have an opportunity to have many previously working web pages show incomplete information as the device id relationships are reworked.
- The upgrade does a lousy job checking the completion of the SQL upgrade scripts. Expect that several of these will fail silently.
- The new alarm_server/nas combo take more RAM. You may need to increase the JVM settings
- The password portlet is gone. Need to replace pages that have that with the account admin portlet. Make sure your ACLs are correct
- You need to manually upgrade the REST interface if you use that
- USM is much much much slower than in 8.31 - by two orders of magnitude in my case. 17 minutes to successfully load worst case of the successful loads - nothing shorter than 30 seconds or so. More often than not your login expires before the load is complete.
- Wasp startup is slow. The official comment from support is that 15 minutes for startup - activate to first successful page load - is expected and normal.
- Make sure that policy_engine stays disabled. The upgrade will inactivate it on the central hub but since it is now replaced, you have to manually disable and remove it wherever it might be installed.
- EMS is in this new release - appears to only support a single central hub. Bad news if you use HA or nas replication
- The Wasp upgrade may fail to install the UMP root. Need to delete the webapps/ROOT directory and the the ROOT.war (could be wrong about the name) and redeploy to get it to create.
- The listviewer portlet didn't deploy correctly on the first attempt - apparently the .war file didn't deploy and so the old version was left in place at the end of the upgrade.
- Expect the UIM and UMP upgrades together to take roughly five hours - longer if you have to call support.... And you have to do both at the same time. There are several database changes that break UMP. If you have customers using the portal pages, they will experience an outage for the whole duration.
So this is my short list - there are many more annoyances
-Garin