write error to log

functions.go

@@ -16,5 +16,5 @@ func CreateObject(v *Instance, config interface{}) (interface{}, error) {
 }
 
 func PrintDeprecatedFeatureWarning(feature string) {
-	newError("You are using a deprecated feature: " + feature + ". Please update your config file with latest configuration format, or update your client software.")
+	newError("You are using a deprecated feature: " + feature + ". Please update your config file with latest configuration format, or update your client software.").WriteToLog()
 }