I do have Geodata service and couple of mapservice in ArcGIS Server. There is no activities (sync) going on server, but still see the following error in ArcGIS Server logs. Any idea why am I getting this error? We don't have clusters, using only one ArcGIS Server 10.2.2 machine.
Error:An error was encountered while synchronizing with the config store. Failed to synchronize machine 'XXXXX' with the site. Failed to update the identity store configuration. Failed to refresh the identity store configuration. RemoteException occurred in server thread; nested exception is: java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is: java.lang.ClassNotFoundException: com.esri.arcgis.discovery.servicelib.ServerContext