Is it possible the SQL database is corrupt or has too many connections on it? Ultimately what happens with the “process” is the FOG Client sends the data to it’s respective service script. FOG Printer Management sends to {$fogwebdir}/service/PrinterManager.php. The php obtains the information and pulls it from the Database, then reports it’s “findings” to the Client that initiated the call.
It sounds to me like the mysql server has limited the connections, and may be in a Locked or timed out status.