It looks like your FQDN for the VC is not resolvable.
From what point of view are you referring to DNS resolution? e.g. on the ESXi hosts, from the vShield/vCNS Manager, etc.
It also looks like a spawned ID for vCenter ... and it might not be the actual DNS value ... this also means that some certificates in vCenter may be using this ID rather than the more appropriate FQDN as defined in DNS.