feat(server): cluster level event system (#9884)

packages/backend/server/src/base/websocket/adapter.ts

@@ -39,17 +39,18 @@ export class SocketIoAdapter extends IoAdapter {
     }
 
     const pubClient = this.app.get(SocketIoRedis);
-
-    pubClient.on('error', err => {
-      console.error(err);
-    });
-
     const subClient = pubClient.duplicate();
-    subClient.on('error', err => {
-      console.error(err);
-    });
 
     server.adapter(createAdapter(pubClient, subClient));
+    const close = server.close;
+
+    server.close = async fn => {
+      await close.call(server, fn);
+      // NOTE(@forehalo):
+      //   the lifecycle of duplicated redis client will not be controlled by nestjs lifecycle
+      //   we've got to manually disconnect it
+      subClient.disconnect();
+    };
 
     return server;
   }