DHT routing example code does not discover peers and exits irregularly

[pvh]

• Version: 2a81fc7
• Platform: ubuntu 17.10 / node v8.7.0
• Subsystem: js-libp2p-dht-kad

Type: Example routing code crashes

Severity: high

Description: the example code does not execute successfully

Steps to reproduce the error:

1. checkout js-libp2p
2. copy examples/peer-and-content-routing/{12}.js somewhere
3. npm install all the things
4. node {1,2}.js

Result

The scripts fail to discover other peers and exit irregularly.

This is the DEBUG=* from routing/1.js: https://gist.github.com/anonymous/fc0b56120e94b054d0006f35fe8a5620

[dryajov]

thanks for reporting this, @pvh !

[nunofmn]

It seems that 100 ms is not enough time to peers establish connections.
By increasing to 300 ms was possible to discover other peers

// Set up of the cons might take time
(cb) => setTimeout(cb, 100)

I'm going to open a PR to increase the delay.

[pvh]

On a different machine here the examples work with a 100ms timeout but not a 10ms timeout, so it appears you've found the right cause, Nuno. I would suggest a more descriptive error message is worth doing. Also, if you're fixing the examples the link from the README.md is broken.

[daviddias]

Thanks for fixing this @nunofmn and @pvh for catching :)