I keep receiving the same two persistent log messages / errors in Server Manager 10.2.1 and it seems to be related to a single cached Map Service.
There is an error during the draw (1.) Unspecified error
Unable to process request. bytes
As you can see below the log is consistently repeating every 30 mins or so. Admittedly my Server Manager maybe overloaded as there are about 75 services running on 5 clustered servers but generally speaking my services are working fine including the service receiving errors mentioned above, as I have not received any feedback to make me think otherwise.
Has anyone had similar issues? And how were you able to resolve this?

Can anyone help, please?