WebDriver: ChromeDriver attempting to reach http://localhost/session on initialization and failing - selenium

Question

The full error message is:
Test(s) failed. OpenQA.Selenium.WebDriverException : The HTTP request to the remote WebDriver server for URL http://localhost:59662/session timed out after 60 seconds.
----> System.Net.WebException : The operation has timed out
The line in my code where this is happening simply instances a new ChromeDriver instance:
CurrentDriver = new ChromeDriver(section["chromedriverfolder"]);
So my question is... why does a new ChromeDriver invokes the /session URL, and what could be causing it to fail?

Answer 1

I experienced this same error using Selenium.WebDriver.ChromeDriver v2.22 and Chrome v52.0.2743.116 m running on TeamCity 9.x. I was able to fix the problem by rolling back the version of Chrome running on the TeamCity agents to v51.
When examining the agent executing the test, there is a popup with error: "Chrome Automation extension has crashed. Click this balloon to reload the extension."
It seems like a bug with the latest version of Chrome and Selenium.WebDriver.ChromeDriver, but as of yet this is the only lead I've found
EDIT: The link to the ChromeDriver issue
EDIT2: The link to the resolution

Answer 2

I have the answer where ChromeDriver invokes the /session URL, but not to the second part why it is timing out. Please see if it can provide some lead to the debug process to find out the failure :
When we call new ChromeDriver()
It creates RemoteWebDriver in the constructor :
super(new DriverCommandExecutor(service), capabilities);
which ultimately goes to :
public RemoteWebDriver(CommandExecutor executor, Capabilities desiredCapabilities,
Capabilities requiredCapabilities) {
In this method we do startClient which basically does nothing in this particular case
After startClient we do :
startSession(desiredCapabilities, requiredCapabilities);
This method issues the request /session in the following line :
Response response = execute(DriverCommand.NEW_SESSION, parameters);
The DriverCommand.NEW_SESSION is set as newSession which is mapped to post /session in the Command Codec
defineCommand(NEW_SESSION, post("/session"));