Recently noticed the following error with sync :
Sync failed: Unknown: IOException: Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host. ---> System.Net.Sockets.SocketException: An existing connection was forcibly closed by the remote host~~at
System.Net.ConnectStream.Read(Byte[] buffer, Int32 offset, Int32 size). Source: Microsoft.SystemsManagementServer.SoftwareUpdatesManagement.WsusSyncAction.WSyncAction.SyncWSUS
1. assumed it may be related to firewall appliance, so i bypassed it into DMZ - No joy
2. changed the SUP classifications. Found if I just leave definitions on it works. Checking anything else from critical updates to updates, to feature packs, etc, causes the error repetitively.
3. removed SUP, rebooted, removed WSuS (windows 2012 R2- site is hosted on the Windows 2012 R2 box). No joy.
4.Server cleanup wizard in wsus console - no joy
5. considering reindexing the sql WID DB, but i dont think will make a difference.
I have wrestled with this for weeks without success. no proxy involved. this is a primary site with the WSUS and SUP role.
Any ideas?