SOLVED WSUS synchronization failed on SCCM server with error : AN HTTP Error OCcured WebException: The underlying connection was closed: An unexpected error

[udaykumar35]

WSUS SYnchronization failing after the SCCM upgrade with below error message, please suggest us how to resolve this


WebException: The underlying connection was closed: An unexpected error occurred on a send. --->

System.IO.IOException: Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host.

at System.Web.Services.Protocols.WebClientProtocol.GetWebResponse(WebRequest request)

at Microsoft.UpdateServices.ServerSync.ServerSyncCompressionProxy.GetWebResponse(WebRequest webRequest)

at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)

at Microsoft.UpdateServices.ServerSyncWebServices.ServerSync.ServerSyncProxy.GetAuthConfig()

at Microsoft.UpdateServices.ServerSync.ServerSyncLib.InternetGetServerAuthConfig(ServerSyncProxy proxy, WebServiceCommunicationHelper webServiceHelper)

at Microsoft.UpdateServices.ServerSync.ServerSyncLib.Authenticate(AuthorizationManager authorizationManager, Boolean checkExpiration, ServerSyncProxy proxy, Cookie cookie, WebServiceCommunicationHelper webServiceHelper)

at Microsoft.UpdateServices.ServerSync.CatalogSyncAgentCore.SyncConfigUpdatesFromUSS()

at Microsoft.UpdateServices.ServerSync.CatalogSyncAgentCore.ExecuteSyncProtocol(Boolean allowRedirect)

 

[Garth]

Exactly what Trouble shooting have you done?

 

[udaykumar35]

Verfied the ports are fine, there is no firewall blocking, verified MSupdate sites\url's are accessible via server
verified the TLS is ruled out as server is 2016 by default it is enabled
uninstalled and reinstalled the SUP Role