This was on the client box. The server box seemed fine. I pressed control-C to allow the box to continue booting. The above process worked. The mount succeeded.
Life goes on.
Each time I reboot the NFS server, I find that the clients can't access it. I also noticed that one of my mounts doesn't mount properly. And that mountd was not running on the server. Then, on the client, I manually mounted the missing volumes. Remember, all articles age with time.