When using the ZDU to upgrade to 21.0.5 there are numerous problems that occur:
1) after starting of new process - FORCED TRACES are written
2) new WP aborted
3) during ZDU wizard - agent and user re-connect not working
4) FINALIZE not working - throws error: There are still messages waiting in 'mq2pwp'
5)Occasionnally 21.0.5 Work processes can crash with a Segmentation fault Signal (SIGSEV 11 during processing of Events).
Release : ZDU upgrading to 21.0.5
Component: Automation Engine
Function: ZDU (Zero Downtime Upgrade)
Database Type: All Databases
OS: All OS Types
This is fixed with 21.0.5 HF2 and higher
It is important to not use ZDU to upgrade to any lower release of 21.0 than 21.0.5 HF2. Manual upgrades can still be carried out without issue.
All OS and Databases are impacted