Red Hat RHEL7 - NFS service is down - reboot needed

Problem:
NFS service is down

Logs: 
[16-11-23-10:06:00] [root@servername - ~]
cat /etc/redhat-release
Red Hat Enterprise Linux Server release 7.3 (Maipo)

[16-11-23-10:06:02] [root@servername - ~]
systemctl status nfs-server.service
● nfs-server.service - NFS server and services
   Loaded: loaded (/usr/lib/systemd/system/nfs-server.service; enabled; vendor preset: disabled)
   Active: failed (Result: exit-code) since Wed 2016-11-23 10:06:02 CET; 7s ago
  Process: 11699 ExecStart=/usr/sbin/rpc.nfsd $RPCNFSDARGS (code=exited, status=1/FAILURE)
  Process: 11697 ExecStartPre=/usr/sbin/exportfs -r (code=exited, status=0/SUCCESS)
 Main PID: 11699 (code=exited, status=1/FAILURE)

Nov 23 10:06:02 servernamesystemd[1]: Starting NFS server and services...
Nov 23 10:06:02 sservername rpc.nfsd[11699]: rpc.nfsd: writing fd to kernel failed: errno 111 (Connection refused)
Nov 23 10:06:02 servername rpc.nfsd[11699]: rpc.nfsd: unable to set any sockets for nfsd
Nov 23 10:06:02 servername systemd[1]: nfs-server.service: main process exited, code=exited, status=1/FAILURE
Nov 23 10:06:02 servername systemd[1]: Failed to start NFS server and services.
Nov 23 10:06:02 servernamesystemd[1]: Unit nfs-server.service entered failed state.
Nov 23 10:06:02 servernamesystemd[1]: nfs-server.service failed.

So checking the rpcbind service:

[16-11-23-10:07:18] [root@servername - ~]
systemctl status rpcbind.service start
● rpcbind.service - RPC bind service
   Loaded: loaded (/usr/lib/systemd/system/rpcbind.service; indirect; vendor preset: enabled)
   Active: failed (Result: start-limit) since Wed 2016-11-23 05:31:58 CET; 4h 35min ago
 Main PID: 1278 (code=exited, status=0/SUCCESS)

Nov 23 05:31:58 servername systemd[1]: Starting RPC bind service...
Nov 23 05:31:58 servername rpcbind[20677]: /sbin/rpcbind: symbol lookup error: /sbin/rpcbind: undefined symbol: libtirpc_set_debug
Nov 23 05:31:58 servername systemd[1]: rpcbind.service: control process exited, code=exited status=127
Nov 23 05:31:58 servername systemd[1]: Failed to start RPC bind service.
Nov 23 05:31:58 servername systemd[1]: Unit rpcbind.service entered failed state.
Nov 23 05:31:58 servername systemd[1]: rpcbind.service failed.
Nov 23 05:31:58 servername systemd[1]: start request repeated too quickly for rpcbind.service
Nov 23 05:31:58 servername systemd[1]: Failed to start RPC bind service.
Nov 23 05:31:58 servername systemd[1]: rpcbind.service failed.

Solution:
actually, a quite big set of update was applied from Red Hat Satellite, and server needed a reboot (even if it was not advertised by Satellite updates summary).
shutdown -r now
As I did not find any related information for the errors above, I quickly write this :)