fix(microservices): multiple rmq client urls issue #9364

integration/microservices/e2e/sum-rmq.spec.ts

@@ -77,6 +77,13 @@ describe('RabbitMQ transport', () => {
       .expect(200, '15');
   });
 
+  it(`/POST (multiple-urls)`, () => {
+    return request(server)
+      .post('/multiple-urls')
+      .send([1, 2, 3, 4, 5])
+      .expect(200, '15');
+  }).timeout(10000);
+
   it(`/POST (event notification)`, done => {
     request(server)
       .post('/notify')

integration/microservices/src/rmq/rmq.controller.ts

@@ -61,6 +61,21 @@ export class RMQController {
       .reduce(async (a, b) => (await a) && b);
   }
 
+  @Post('multiple-urls')
+  @HttpCode(200)
+  multipleUrls(@Body() data: number[]) {
+    const clientWithMultipleUrls = ClientProxyFactory.create({
+      transport: Transport.RMQ,
+      options: {
+        urls: [`amqp://localhost:5671`, `amqp://localhost:5672`],
+        queue: 'test',
+        queueOptions: { durable: false },
+        socketOptions: { noDelay: true },
+      },
+    });
+    return clientWithMultipleUrls.send<number>({ cmd: 'multiple-urls' }, data);
+  }
+
   @Post('record-builder-duplex')
   @HttpCode(200)
   useRecordBuilderDuplex(@Body() data: Record<string, any>) {
@@ -109,6 +124,11 @@ export class RMQController {
     return from(data);
   }
 
+  @MessagePattern({ cmd: 'multiple-urls' })
+  handleMultipleUrls(data: number[]): number {
+    return (data || []).reduce((a, b) => a + b);
+  }
+
   @Post('notify')
   async sendNotification(): Promise<any> {
     return this.client.emit<number>('notification', true);

packages/microservices/client/client-rmq.ts

@@ -3,7 +3,7 @@ import { loadPackage } from '@nestjs/common/utils/load-package.util';
 import { randomStringGenerator } from '@nestjs/common/utils/random-string-generator.util';
 import { EventEmitter } from 'events';
 import { EmptyError, fromEvent, lastValueFrom, merge, Observable } from 'rxjs';
-import { first, map, share, switchMap } from 'rxjs/operators';
+import { first, map, retryWhen, scan, share, switchMap } from 'rxjs/operators';
 import {
   CONNECT_FAILED_EVENT,
   DISCONNECTED_RMQ_MESSAGE,
@@ -118,7 +118,20 @@ export class ClientRMQ extends ClientProxy {
         }),
       );
     const disconnect$ = eventToError(DISCONNECT_EVENT);
-    const connectFailed$ = eventToError(CONNECT_FAILED_EVENT);
+
+    const urls = this.getOptionsProp(this.options, 'urls');
+    const connectFailed$ = eventToError(CONNECT_FAILED_EVENT).pipe(
+      retryWhen(e =>
+        e.pipe(
+          scan((errorCount, error: any) => {
+            if (urls.indexOf(error.url) >= urls.length - 1) {
+              throw error;
+            }
+            return errorCount + 1;
+          }, 0),
+        ),
+      ),
+    );
     return merge(source$, disconnect$, connectFailed$).pipe(first());
   }