title: Selenium: "DevTools Request: 127.0.0.1:12583/json/version failed" upon instantiation
body: <p>When I create a new chrome driver in Selenium while  Google Chrome is already running AND I am referencing the users settings/data (via <code>user-data-dir</code>). A new Chrome window will open, but my application will hang. The ChromeDriver console will display the following error each second: <code>DevTools Request: 127.0.0.1:12585/json/version. DevTools request failed</code></p>
  
  <p>Screenshot: <a href="https://i.stack.imgur.com/7mUnX.png" rel="noreferrer"><img src="https://i.stack.imgur.com/7mUnX.png" alt="enter image description here"></a></p>
  
  <p>Code to instantiate the driver:</p>
  
  <pre><code>        ChromeDriverService driverService = ChromeDriverService.CreateDefaultService();
          //driverService.HideCommandPromptWindow = true;
          driverService.EnableVerboseLogging = true;
  
          string path = Environment.ExpandEnvironmentVariables("%LOCALAPPDATA%\\Google\\Chrome\\User Data");
  
          ChromeOptions options = new ChromeOptions();
          options.AddArguments("user-data-dir=" + path);
          options.AddArguments("--start-maximized");
          options.AddArguments("--disable-extensions");
  
          IWebDriver driver = new ChromeDriver(driverService, options);
  </code></pre>
  
  <p>This will work perfectly fine in every instance if I do not try and load user settings/data. If I am trying to load user setting/data it will only work if there is no instance of Chrome running on the device already.</p>
  
  <p><strong>Versions:</strong></p>
  
  <ul>
  <li>Selenium v 2.47.0 </li>
  <li>ChromeDriver v 2.16.333243  </li>
  <li>Chrome v44.0.2403</li>
  </ul>
  
  <p>What can I do to resolve this?</p>