Merge pull request #40310 from gtmanfred/2016.11

add warning when no host/dns record is found for fqdn_ip

salt/grains/core.py

@@ -1688,6 +1688,8 @@ def ip_fqdn():
                 info = socket.getaddrinfo(_fqdn, None, socket_type)
                 ret[key] = list(set(item[4][0] for item in info))
             except socket.error:
+                log.warning('Unable to find IPv{0} record for "{1}" causing a 10 second timeout when rendering grains. '
+                            'Set the dns or /etc/hosts for IPv{0} to clear this.'.format(ipv_num, _fqdn))
                 ret[key] = []
 
     return ret