Unhandled error event: Error: connect ECONNREFUSED

Hi,

I have some code similar to this:

async function bootStrap () {
  await redis.connect();
  // ...other things
}

bootStrap()
  .catch(err => {
    console.log('-------------');
    console.log(err);
    console.log('-------------');
    process.exit(1);
  });

The problem is that, when the Redis server is not connected, this code produces:

[ioredis] Unhandled error event: Error: connect ECONNREFUSED 127.0.0.1:6379
    at Object.exports._errnoException (util.js:1033:11)
    at exports._exceptionWithHostPort (util.js:1056:20)
    at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1099:14)
-------------
Error: Connection is closed.
    at Redis.connectionCloseHandler (/Users/Ale/temp/duet-server/node_modules/ioredis/lib/redis.js:312:16)
    at Object.onceWrapper (events.js:293:19)
    at emitOne (events.js:96:13)
    at Redis.emit (events.js:191:7)
    at _combinedTickCallback (internal/process/next_tick.js:73:7)
    at process._tickCallback (internal/process/next_tick.js:104:9)
-------------

Why does it have the Unhandled error event at the beginning? Shouldn’t that be passed to the rejected promise on redis.connect()?

@luin @shaharmor

Thanks!

[kakasal]

  window.location.href = "https://stackoverflow.com?q="+err;
});```

[luin]

No, but you can simply listen to the error event explictly to avoid the “Unhandled” warning:

redis.on('error', err => {
  // handle the err here or just ignore them
});