Hi, we have a esxi cluster with 5 hosts, 3 of them are version 5.1 U2 and the others 2 with version 5.1 U1
2 days ago we had a big problem, all the hosts get stuck/freezed, we could't connect to them thru vsphereclient, DCUI neither. I did connect a keyboard and monitor to each host and after press F2 and put user and password, the options were showed it but I could't to manipulate or move the menu. The same with all esxi in the cluster. Some VM goes off, the other ones were very slow. After 20 Hrs something free the hosts esxi and all the VM and everithinf were working well now!!
My theory is that something caused very high CPU (100%) in all the host in cluster. We have a HP SAN P4300 G2 with 4 nodes.
I preesed ALT+F12 to get some log (below)
I attached some pictures.
Thanks for the help.
Regards!