RabbitMQ Node.js设置预取或QOS不起作用

Question

我使用RabbitMQ，我需要在队列中获取随机数量的消息。

但是，不幸的是，运行代码时，预取和Qos设置不起作用。 2条消息同时具有相同的diliveryTag。 因此我无法获得预期的消息数量。

这是我的代码：

exports.getMessageFromQueue = async  function(queue,numbMessage) {
            var exchange = queue + '.exchange';
            var result = [];
            var countReceive = 0;
            var isDone = false;



          let channel = await conn.createChannel()
          let response = await channel.assertQueue(queue)
          await channel.prefetch(1);
          await channel.qos(1); 

          response = await channel.bindQueue(response.queue, exchange, '');


          channel.consume(response.queue,getMessage(numbMessage), {noAck: false})

          setTimeout(() => {
            eventEmitter.emit('consumeDone');
          if(channel != null)channel.close();}, timeout)

          await new Promise(resolve => eventEmitter.once('consumeDone', ()=>{
            console.log("done event");
            resolve()
          }));
          console.log("return");
          return result;
        //   console.log('reading for query finish')

          function getMessage(messageCount) {
            return msg => {
                var content = msg.content.toString();
                var secs = content.split('.').length - 1;
                result.push(JSON.parse(content));
                console.log("deliveryTag:" + msg.fields.deliveryTag)
                if (messageCount == deliveryTag) {
                    console.log(" [x] Done messageCount");
                    eventEmitter.emit('consumeDone')
                    channel.cancel(msg.fields.consumerTag)
                    channel.ack(msg);
                    channel.close();
                    channel = null;
                }else {
                  setTimeout(function() {
                    console.log(" [x] Done");
                    channel.ack(msg);
                  },  secs *1000);
                }
           }

          }
        }

任何人都遇到这个问题，请帮忙！