Hello All,
I got "503 server unavailable" error on vCenter appliance after some time after I upgraded one of the ESXi hosts from 5.5 to 6.0.0b I'm not sure if the upgrade caused to this issue but I saw this issue 12 hours later after upgrade. I was using vCenter Update Manager to upgrade ESXi host.
I run a vCenter cluster which contains two vCenters and one Platform Service Controller. The issue happened on the vCenter which manages the upgraded ESXi hosts. Another vCenter works fine.
Any idea, where I can look for the issue? Or is somebody was facing a similar issue after ESXi hosts upgrade?
Thank you!
