connerr.js

var mod_http = require('http');

var host = '127.0.0.1';
var port = 8085;
var concurrency = 20;

var done = 0;

var server = mod_http.createServer(function (request, response) {
	response.writeHead(200, {'Content-Type': 'text/plain'});
	response.end('Hello World\n');
});

server.listen(port, function () {
	for (var ii = 0; ii < concurrency; ii++)
		makeRequest(doneRequest);
});

process.on('SIGHUP', function () {
	console.log('finished %d requests so far', done);
});

function makeRequest(callback)
{
	var request;

	request = mod_http.request({
		host: host,
		port: port,
		path: '/',
		method: 'GET',
		agent: false
	}, function (response) {
		response.on('data', function (chunk) {});
		response.on('end', function() { callback(); });
	});

	request.end();
}

function doneRequest(err)
{
	if (err) {
		console.log('dying after %d requests', done);
		throw (err);
	}

	done++;
	makeRequest(doneRequest);
}