Hello. I'm upgrading our current infra (Vcenter/3 ESXi 4.1 hosts/Essential license). vCenter Server was upgraded OK, then I began upgrade esxi hosts one by one.
Upgrade process is OK, but after rebooting, upgraded server marked as "not responding" in vsphere client. I could ping this host and connect through ssh.
When trying to reconnect host from client, got a strange error "This edition of vCenter only supports 3 host(s) in the inventory". After 3-4 hours of doing nothing host
began to showing ok. After upgrade a second host, the same situation. I don't understand, how to resolve it without waiting another 4 hours.
Restarting management agents on host does not help.