The last months we have had several issues with ESXi hosts going in a “Not responding” status. The VMs are still active and online in this scenario, but the ESXi cannot be managed. This also affets backup as it won’t be able to reach the VMs through the APIs.
Previously we have normally just restarted the management agents on the host and it has been able to connect to vCenter and after this we have managed to migrate the VMs off the host. Lately this hasn’t worked and we have been forced to boot the host with the result of the VMs getting rebooted by HA and eventually started on a different host.… continue reading