Cannot read property ‘fd’ of null

[honcheng]

I’m not able to run the example.js.
When I made the first request, it prints out this without any notifications in Google Home.

{ text: 'Hello Google Home' }
Device "Google-Home-3e482a7482fb715cf1cc578a08278d10" at 192.168.1.88:8009

Then, subsequent requests will get this error. I made sure I have the latest version of nodejs.

{ text: 'Hello Google Home' }
TypeError: Cannot read property 'fd' of null
at Browser.start (/home/pi/google-home-notifier/node_modules/mdns/lib/mdns_service.js:32:35)
at Object.notify (/home/pi/google-home-notifier/google-home-notifier.js:23:13)
at /home/pi/google-home-notifier/example.js:20:16
at Layer.handle [as handle_request] (/home/pi/google-home-notifier/node_modules/express/lib/router/layer.js:95:5)
at next (/home/pi/google-home-notifier/node_modules/express/lib/router/route.js:137:13)
at /home/pi/google-home-notifier/node_modules/body-parser/lib/read.js:130:5
at invokeCallback (/home/pi/google-home-notifier/node_modules/raw-body/index.js:262:16)
at done (/home/pi/google-home-notifier/node_modules/raw-body/index.js:251:7)
at IncomingMessage.onEnd (/home/pi/google-home-notifier/node_modules/raw-body/index.js:307:7)
at emitNone (events.js:105:13)

[honcheng]

Problem goes away when reverting back to this commit ae2b118

[tinoue]

The error occurs when google-home-notifier can't find Google Home by mDNS.
In my case my wifi access point disables all multicast transmission.

[kazhik]

If service.name('Google-Home-***') doesn't contain device(Google Home), browser is stopped.
Next call of browser.start() will throw TypeError: Cannot read property 'fd' of null.

  if (!deviceAddress){
     browser.start();
     browser.on('serviceUp', function(service) {
      console.log('Device "%s" at %s:%d', service.name, service.addresses[0], service.port);
      if (service.name.includes(device.replace(' ', '-'))){
        deviceAddress = service.addresses[0];
        getSpeechUrl(message, deviceAddress, function(res) {
          callback(res);
        });
      }
      browser.stop();

Fix: kazhik@34e9f53