rabbitmq + nodejs Why is the message not removed from the queue after being received?

Question

Node.js

// send.js
amqp.connect('amqp://localhost', function(err, conn) {
  conn_ = conn;
  conn.createChannel(function(err, ch) {
    ch_ = ch;
    var q = 's1';
    ch.assertQueue(q, {durable: false});
    ch.sendToQueue(q, new Buffer('Hello World! '+ +new Date()));
  });
});

// read.js
amqp.connect('amqp://localhost', function(err, conn) {
  conn.createChannel(function(err, ch) {
    var q = config.rabbitmq.queue_name;
    ch.assertQueue(q, {durable: false});
    ch.consume(q, (msg) => {
      console.log(msg.content.toString());
    });
  });
});

Answer 1

rabbitmq is waiting for confirmation of message processing.
You must either confirm (ack) or create a consumer indicating that you do not need to wait for confirmation (noAck)