how to verify connection / debug connection problems?

[codeofsumit]

How can I debug connection problems?

This is my code but there is no console output at all. I'm sure the connection did not establish but I'd like some debug information.

const Kafka = require('kafka-node');
const Consumer = Kafka.Consumer;
const client = new Kafka.Client('localhost:3001', 'kafka-node-client');
const consumer = new Consumer(client, [
  {
    topic : 'test'
  }
]);

client.on('error',function(err) {
  console.log(err);
});

consumer.on("ready", (err) => {
    console.log(err || "Connected to kafka");
});

consumer.on('error', function (err) {
    console.log('err: ' + err);
});

[hyperlink]

Hi. Is the address you're passing into the client a zookeeper host?

Unfortunately, if the module can't connect to zookeeper the zookeeper client will just silently fail and keep retrying. #117

[codeofsumit]

that's very unfortunate :-/

[hyperlink]

but in practice it's not a big issue. How often are you unsure of where your zookeeper host lives? If you're worried about failures you can also provide a list of zookeeper hosts and it will attempt to connect to any of them.

[ApoorvSaxena]

Possible to provide a timeout in the config which fails in case Zookeeper connection is not feasible till then?

[hyperlink]

It's simple to add a timeout around if ready was emitted.