MagicMirror² v2.13.0 is available! For more information about this release, check out this topic.

npm start and black screen

  • Here is the log:

    Sockets connected & modules started ...
    Whoops! There was an uncaught exception...
    { Error: listen EADDRINUSE
        at Object.exports._errnoException (util.js:1026:11)
        at exports._exceptionWithHostPort (util.js:1049:20)
        at Server._listen2 (net.js:1253:14)
        at listen (net.js:1289:10)
        at net.js:1399:9
        at _combinedTickCallback (internal/process/next_tick.js:77:11)
        at process._tickCallback (internal/process/next_tick.js:98:9)
        at Module.runMain (module.js:592:11)
        at run (bootstrap_node.js:402:7)
        at startup (bootstrap_node.js:157:9)
      code: 'EADDRINUSE',
      errno: 'EADDRINUSE',
      syscall: 'listen',
      address: '',
      port: 8080 }
    MagicMirror will not quit, but it might be a good idea to check why this happened. Maybe no internet connection?
    If you think this really is an issue, please open an issue on GitHub:
    Launching application.
    Shutting down server...

    How to fix this?

    Note : Use “pm2 start mm” is able to run mm.

  • @dexterbeng
    I found the problem issue

    So i use pm2 stop mm, then i can use back npm start since no application is using port:8080.

    But still, is there anyone can explain to me, why my pm2 start mm is take while to boot up my mm, even i ctrl+q, it will turn mm back very long time or never turn on again?

  • @dexterbeng If you have pm2 and the mm script installed, it’s simplest to use pm2 start/stop mm. However, npm start dev is still useful to debug server and client consoles, just don’t forget to first pm2 stop mm as you describe.

  • @ninjabreadman
    Ya, agree with that pm2 is the easier way.
    By the way, can I know when you using pm2 to start your mm and you ctrl+q to quit it, how long it takes to auto boot it up again?
    For me, it likes 15 seconds to 30 seconds, and sometimes never turn on again…

  • @dexterbeng I would guess 15-30 seconds. pm2 has to detect that the process has terminated and restart. It depends on the polling interval for pm2 (which, as far as I can tell from their docs/issues, is 100ms, and cannot be changed – seems more frequent than I expected).

    Why are you killing mm with Ctrl+Q? Better to use pm2 restart mm or even pm2 start mm --watch which will also restart mm after file system changes (you may need to configure which directories to watch).

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