Node issue #5545 reproduction script.js

var http = require('http');

var timeInterval = 20; //ms
var maxOutstandingRequests = 10;

var successCount = 0;
var outstandingRequests = 0;

var options = {
    hostname: 'www.google.com'
  , agent: false
};

var makeRequest = function() {

  if ( outstandingRequests >= maxOutstandingRequests ) {
    return;
  }

  outstandingRequests++;
  var req = http.get(options, function(res) {
    if ( ! res || ! res.statusCode || res.statusCode !== 200 ) {
      outstandingRequests--;
      console.log('Fail. successCount: ', successCount, ', outstandingRequests: ', outstandingRequests);
    } else {
      res.resume(); // or res.on('data', fn) or repeatedly call res.read() to pull the data out
      res.on('end', function() {
        outstandingRequests--;
        successCount++;
      });
    }
  });

  req.on('error', function(e) {
    outstandingRequests--;
    console.log('error: ', e.message, ', successCount: ', successCount);
  });
};

setInterval(makeRequest, timeInterval);