Stabilize test HttpBandwidthLimitingTest.testDynamicOutboundRateUpdateSharedServers

Only a server that has completed the listening is ready to
update the traffic shaping.

Closes #5863

Author: ahus1

src/main/java/io/vertx/core/net/impl/TCPServerBase.java

@@ -148,6 +148,9 @@ public void updateTrafficShapingOptions(TrafficShapingOptions options) {
     if (options == null) {
       throw new IllegalArgumentException("Invalid null value passed for traffic shaping options update");
     }
+    if (!listening) {
+      throw new IllegalStateException("Listening initialization not completed yet");
+    }
     TCPServerBase server = actualServer;
     // Update the traffic shaping options only for the actual/main server
     if (server != null && server != this) {
@@ -189,7 +192,6 @@ private synchronized Future<Channel> listen(SocketAddress localAddress, ContextI
     }
 
     this.listenContext = context;
-    this.listening = true;
     this.eventLoop = context.nettyEventLoop();
 
     SocketAddress bindAddress;
@@ -285,7 +287,7 @@ private synchronized Future<Channel> listen(SocketAddress localAddress, ContextI
           }
           listening = false;
         });
-
+        this.listening = true;
         return bindFuture;
       } else {
         // Server already exists with that host/port - we will use that
@@ -298,6 +300,7 @@ private synchronized Future<Channel> listen(SocketAddress localAddress, ContextI
         actualServer.channelBalancer.addWorker(eventLoop, worker);
         listenContext.addCloseHook(this);
         main.bindFuture.onComplete(promise);
+        this.listening = true;
         return promise.future();
       }
     }

src/test/java/io/vertx/core/http/HttpBandwidthLimitingTest.java

@@ -213,28 +213,26 @@ public void testDynamicOutboundRateUpdateSharedServers() throws IOException, Int
       public void start(Promise<Void> startPromise) throws Exception
       {
         HttpServer testServer = serverFactory.apply(vertx);
-        servers.add(testServer);
         testServer.requestHandler(HANDLERS.getFile(sampleF))
                   .listen(DEFAULT_HTTP_PORT, DEFAULT_HTTP_HOST).onComplete(res -> {
                     if (res.succeeded()) {
+                      servers.add(testServer);
                       // Apply traffic shaping options after the server has started
                       TrafficShapingOptions updatedTrafficOptions = new TrafficShapingOptions()
                                                                       .setInboundGlobalBandwidth(INBOUND_LIMIT)
                                                                       .setOutboundGlobalBandwidth(2 * OUTBOUND_LIMIT);
 
                       List<Promise<Void>> promises = new ArrayList<>();
-                      for (int i = 0; i < numEventLoops; i++) {
-                        servers.forEach(s -> {
-                          Promise<Void> promise = Promise.promise();
-                          try {
-                            s.updateTrafficShapingOptions(updatedTrafficOptions);
-                            promise.complete();
-                          } catch (Exception e) {
-                            promise.fail(e);
-                          }
-                          promises.add(promise);
-                        });
-                      }
+                      servers.forEach(s -> {
+                        Promise<Void> promise = Promise.promise();
+                        try {
+                          s.updateTrafficShapingOptions(updatedTrafficOptions);
+                          promise.complete();
+                        } catch (Exception e) {
+                          promise.fail(e);
+                        }
+                        promises.add(promise);
+                      });
                       // Ensure all traffic shaping updates complete before resolving the startPromise
                       Future.all(promises.stream().map(Promise::future).collect(Collectors.toList()))
                             .onSuccess(v -> startPromise.complete())