This next one left me scratching my head…

I was trying to put one of my hosts into MM for an NSX upgrade / patching and got the following error:

Host cannot enter maintenance mode because it failed to enter Namespaces maintenance mode on the node.

What is really strange is that I don’t run workload management in my environment because I don’t have the licenses for it!!

Anyway, the only way to get the host to enter maintenance mode was to reboot the vCenter… (wtf??)

I am running vCenter 7.0.1 17005016 and the host was on VMware ESXi 7.0.0 15843807 at the time.

Hope this was helpful.