Hello all,
the hole toolserver-cluster was away between (circa) 19:12 and 20:30 UTC. The main-problem was that nfs stoped working and so no login, no web-apps and no command-line-command could have run. It looks that nfs stoped working because DNS-resolving stoped working (and AFAIS DNS stoped working because of low memory or a network-problem). The roots will investigate where the problem exactly was.
Just as information.
Sincerly, DaB.