minor adjustments

server/handler/vmModifyEvent.go

@@ -164,7 +164,14 @@ func (h *Handler) VmModifyEvent(w http.ResponseWriter, r *http.Request) {
 
 			if err != nil {
 				h.Logger.Error("unable to find existing inventory record for this VM", "error", err)
-				// TODO - how to handle?
+				w.Header().Set("Content-Type", "application/json")
+				w.WriteHeader(http.StatusInternalServerError)
+				json.NewEncoder(w).Encode(map[string]string{
+					"status": "ERROR",
+					"message": fmt.Sprintf("Valid request but could not locate vm id '%s' and datacenter name '%s' within inventory table : %s",
+						event.CloudEvent.Data.VM.VM.Value, event.CloudEvent.Data.Datacenter.Name, err),
+				})
+				return
 			} else {
 				params.InventoryId = sql.NullInt64{Int64: invResult.Iid, Valid: invResult.Iid > 0}
 			}