nfs error 'no locks available' after update to 16.10
Someone in systemd land decided that starting nfs shouldn't start the statd service which nfs uses to provide locks. So, your fix should be simple, on the host machine:
sudo systemctl enable rpc-statd # Enable statd on boot
sudo systemctl start rpc-statd # Start statd for the current session
You don't even need to reboot, just launch vagrant after doing that.
Thanks systemd!