When using the Zero Downtime Upgrade (ZDU) to go from 12.3 to 21.0.5 or earlier OR from any service pack within 21.0 to a later service pack or hotfix within 21.0 with postgres as a database for the Automic backend, the following may happen:
4. after changing the Database back to the previous state the system works again.
Full steps to reproduce:
Customer has a system with patch level 12.3.9 + HF.2 and wants to ZDU to 21.0.4 + HF.1
1. Start ZDU - Result everything works fine
2. Start the V21 ucybdbld utility and load the DB -> load finishes fine
The issues above then start to happen
This also happens within 21.0, e.g. using ZDU to go from 21.0.1 to 21.0.4 HF1
Release : 21.0.5 and earlier
There is a bug that appears to be with the base database. This will not be fixed for upgrades from 12.3, but is planned to be fixed with 21.0.6. Until customers are on a fixed version, do not use the ZDU if the backend database for Automic is on postgres.