ESX host grey out ~

Since last night, one of the ESX host in the cluster has became “not responding”, although all the VMs on it are still running, I just don’t know what will happen next.

From home, I logged in through Putty, and tried a few methods that found on Internet, still doesn’t resolve the problem.

This morning had a look at the console screen, it says some CPU Journal I/O error, not sure what it is yet, but looks like I will need to reboot the physical server to try fix it.