Around 3:30pm, our new file server decided to unexport one of the necessary file systems (/misc) and refused to export it when the command exportfs -a was given.  A reboot was necessary to restore service.

     I had been running the latest 4.2.3 kernel rather than the Ubuntu 3.19.0-31 kernel, but opted at that point to revert back to the officially supported kernel.

     Still can’t get rpc.rquotad to function but at least now I know it’s not kernel related.