NFS Stale File Handles
We replaced a backup server at work because of hardware issues and age.
I had to help a person who uses NFS to connect to the server. After the replacement the other person ended up with infamous
stale file handle errors.
I recommended running
umount -f -l and then manually remounting. I considered suggesting rebooting if that command failed, but I pretended that would be unnecessary. I knew better. I was wrong.
The person had to reboot the client system to clear the problem.
At work we had the same problem with servers using the backup server. In our case
umount -f -l succeeded.
How long has NFS been around and this idiotic problem persists?