fix: return a 480 response when an AOR is not found in the location t…

…able

mods/connect/src/handlers/request.ts

@@ -16,6 +16,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+import * as grpc from "@grpc/grpc-js"
 import { Helper as H } from "@routr/location"
 import { tailor } from "../tailor"
 import {
@@ -87,6 +88,9 @@ export const handleRequest =
 
       res.send(tailor(route as CT.Route, req))
     } catch (err) {
+      if (err.code === grpc.status.NOT_FOUND) {
+        return res.sendTemporarilyUnavailable()
+      }
       logger.error(err)
       res.sendInternalServerError()
     }

mods/location/src/location.ts

@@ -126,9 +126,12 @@ export default class Location implements ILocationService {
         ? [await this.nextWithAffinity(routes, request.sessionAffinityRef)]
         : [this.next(routes, request)]
 
-    this.store.put(storeKeyWithLabels, r[0])
+    if (r.length > 0 && r[0]) {
+      this.store.put(storeKeyWithLabels, r[0])
+      return r
+    }
 
-    return r
+    return []
   }
 
   /** @inheritdoc */
@@ -139,6 +142,7 @@ export default class Location implements ILocationService {
   private next(routes: Array<Route>, request: FindRoutesRequest): Route {
     const { backend } = request
     const ref = backend?.ref || request.aor
+
     if (
       backend?.balancingAlgorithm === CT.LoadBalancingAlgorithm.LEAST_SESSIONS
     ) {