backend-defaults: immediately close connections on shutdown in local dev

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

.changeset/bright-boats-dream.md

@@ -0,0 +1,5 @@
+---
+'@backstage/backend-defaults': patch
+---
+
+Immediately close all connections when shutting down in local development.

packages/backend-defaults/src/entrypoints/rootHttpRouter/http/createHttpServer.ts

@@ -53,6 +53,12 @@ export async function createHttpServer(
 
     stop() {
       return new Promise<void>((resolve, reject) => {
+        if (process.env.NODE_ENV === 'development') {
+          // Ensure that various polling connections are shut down fast in development
+          server.closeAllConnections();
+        } else {
+          server.closeIdleConnections();
+        }
         server.close(error => {
           if (error) {
             reject(error);