Client is not passed to server.published method when message has QoS 2

[pkinney]

When a message is sent with QoS of 2, the client object is not passed to the published method. The code below demonstrates this behavior.

const AedesPersistence = require('aedes-persistence');

// -- SERVER ---------------------------
const server = require('aedes')({ persistence: new AedesPersistence() });
require('net').createServer(server.handle).listen(3000);

server.published = (packet, client, cb) => {
  if (packet.topic === 'hello') {
    console.log(`QoS ${packet.qos} =>`, client && client.id); // <-- client is null when QoS is 2
  }
  cb();
};

// -- CLIENT ---------------------------
const client = require('mqtt').connect({ host: '127.0.0.1', port: '3000', clientId: 'my-client' });

client.once('connect', () => {
  client.publish('hello', 'world', { qos: 0 }, () => {});
  client.publish('hello', 'world', { qos: 1 }, () => {});
  client.publish('hello', 'world', { qos: 2 }, () => {});
});

Outputs:

QoS 0 => my-client
QoS 1 => my-client
QoS 2 => null