After searching for answer from the net, I found one which somehow explains what might have gone wrong with my website yesterday… it’s in my previous posting.

You see, all of us are accessing our website’s files from the server across the network. And we might be using Network File System (NFS) which is a network file system protocol. NFS allows us to access the files freely as if they are attached to our local disks.

It explained NFS has mechanisms to help it cope with error conditions. But what happen to my two folders yesterday? It went deadlock. No one have access to it. I think this is where the Stale File Handles was used to fix the two problematic folders by un-mounting and re-mounting the whole devices in my website services through service restart by the 24×7 support team.