Hello, [oVirt 4.2.4.5-1.el7] Sequence : - Among 7 active UP hosts, one of them runs zero VM - On this (still in UP state) host, I run a SSH-restart via the web GUI - The host gracefully shuts down then reboots, with no issue - In the web GUI, as in real life, the host stays in Reboot state forever A this point, the engine can ping it, can ssh-connect to it, the host seems to have zero issue. In the web GUI, I can not put it into active state because it is not in maintenance state. It stays in reboot state. I can not either put it in maintenance state because it stays in reboot state. This state lasts long enough to allow me type this mail, look into logs, and as I was about to send logs, I see the host is returning to life (its states comes back as UP). I don't type fast, so after the host has finished rebooting, maybe 5 or 10 minutes have passed before the engine links again to the host. Before posting additional logs and comments, does anybody know if this is a know bug or behavior, or do I have to open a BZ? Regards, -- Nicolas ECARNOT