NodeJS { [Error: socket hang up] code: 'ECONNRESET' } - node.js

Question

I use Node v0.12.18 and Express v4, and for one POST request, I got this error :
{ [Error: socket hang up] code: 'ECONNRESET' }
Error: socket hang up
at createHangUpError (_http_client.js:215:15)
at Socket.socketOnEnd (_http_client.js:300:23)
at Socket.emit (events.js:129:20)
at _stream_readable.js:908:16
at process._tickDomainCallback (node.js:381:11)
With this code :
optionsYoutube = {
host: dostsub_host,
port: 80,
path: '/api/media/'+ uuid +'/youtube/push',
method: 'POST',
timeout: 1200000, //20 min
headers: {
'Authorization': auth
}
};
console.log('TRY > Youtube');
var postYoutube = http.request(optionsYoutube, function(json) {
json.on('data', function(d) {
body += d;
});
json.on('end', function() {
.....
}).on('error', function(err) {
console.log(err);
return next(err);
});
I try to use this API : https://dotsub.com/apidoc/api#youtube
I looked that can be a problem of timeout, so I set in my app.js :
// set timeout
var timeout = require('connect-timeout');
app.use(timeout(1200000));
app.use(haltOnTimedout);
function haltOnTimedout(req, res, next){
if (!req.timedout) next();
}
But it changed nothing. How can I have more informations on the error ?