GitHub user Chih80 closed the discussion with a comment: HTTP ERROR 503 Service Unavailable
I encounter this problem upgrading from 4.19.1.1 to 4.20.0. After upgrade I tried to access UI but got the 503 error. After downgrading by selecting java 11, I was able to access the UI again. I thought 4.20 needed java 17 to work?? Still searching with a solution. I revert my mgm server back to 4.19.1 java11 and all my KVM host are running on 4.20. All my system VM are also on 4.19.1. GitHub link: https://github.com/apache/cloudstack/discussions/9880#discussioncomment-13382192 ---- This is an automatically sent email for users@cloudstack.apache.org. To unsubscribe, please send an email to: users-unsubscr...@cloudstack.apache.org