The DNS server does not have a cache or other database entry for root name servers. Either the root hints file, cache.dns, ...

The DNS server does not have a cache or other database entry for root name servers. 
Either the root hints file, cache.dns, or Active Directory must have at least one name server (NS) resource record, indicating a root DNS server and a corresponding host (A) resource record for that root DNS server.  Otherwise, the DNS server will be unable to contact the root DNS server on startup and will be unable to answer queries for names outside of its own authoritative zones.  To correct this problem, use the DNS console to update the server root hints.  For more information, see the online Help.