Cannot start the driver service on http://localhost

Question

I would kindly like to ask for help an issue I have running selenium on on a windows server without an interface, I get the following error:

Cannot start the driver service on http://localhost:49906/ at OpenQA.Selenium.DriverService.Start() at OpenQA.Selenium.Remote.DriverServiceCommandExecutor.Execute(Command commandToExecute) at OpenQA.Selenium.Remote.RemoteWebDriver.Execute(String driverCommandToExecute, Dictionary`2 parameters) at OpenQA.Selenium.Remote.RemoteWebDriver.StartSession(ICapabilities desiredCapabilities) at OpenQA.Selenium.Remote.RemoteWebDriver..ctor(ICommandExecutor commandExecutor, ICapabilities desiredCapabilities) at OpenQA.Selenium.Chrome.ChromeDriver..ctor(ChromeDriverService service, ChromeOptions options, TimeSpan commandTimeout) at OpenQA.Selenium.Chrome.ChromeDriver..ctor(ChromeOptions options)

ran it in headless mode and I still get the error – THATO MOLEFE Sep 18 '18 at 11:40 — THATO MOLEFE, Sep 18 '18 at 11:40
As stated, please show us your code. – HaR Sep 18 '18 at 11:59 — HaR, Sep 18 '18 at 11:59

score 1 · Answer 1 · answered Oct 15 '19 at 17:30

1

Changed my Target Framework to .NET Core 2.1 (previously set to .net core 3.0) now its working.

answered Oct 15 '19 at 17:30

Suresh Bhandari

109
1
3

score 1 · Answer 2 · answered May 06 '20 at 13:25

As I wrote here:

When the service start the only things executed are a process with the driver service and an api call to that service.
The problems that can rise could be:

you can't execute the process, because the executable is not reachable
- executable not there
- wrong permissions
some configurations are preventing you from executing successfully the api call and reach http://localhost:60623/
- proxy settings (adding NO_PROXY environment variable excluding localhost might help)
- firewall settings
- port already used

score 1 · Answer 3 · answered Nov 15 '21 at 02:18

In my case, it was because there are too many background chrome process running. Run cmd as admin and use taskkill /f /im chromedriver.exe to kill all chrome driver instances and use taskkill /f /im chrome.ext /t to kill all chrome instances made it work.

score 0 · Answer 4 · answered Sep 17 '18 at 13:41

0

Browser opened with Selenium requires to run in Session 0 (GUI interface in Windows). Most possible that error that you provided is references to this problems.

You can try to solve Session 0 problem with running browser in headless mode, as it doesn't require to render in UI.

How to do it you can check it with this link Headless Chrome

answered Sep 17 '18 at 13:41

Werewolfas

46
4

I ran it in headless mode and I still get the error – THATO MOLEFE Sep 18 '18 at 10:28
After some research in the internet I found that similar problem was registered in Selenium GitHub. Can you please check if this solution will work for you [OpenQA.Selenium.WebDriverException : Cannot start the driver service on http://localhost/](https://github.com/SeleniumHQ/selenium/issues/5293) If this solution does not work can you please provide source code for you WebDriver initialization. – Werewolfas Sep 18 '18 at 14:13

score 0 · Answer 5 · answered Dec 28 '20 at 07:58

Having a VPN client running? In order to fully isolate (for amateurs), the loopback both as Ip and/or hostname are not directly accessible (unless the client is giving a possibility to exclude localhost or 127.0.0.1(and its Ipv6 equivalent) - was freaking me out once like crazy when i couldnt get the driver to work just because I still had my Cyberghost client running, but back to the most likely reason:

Especially when working a lot with ports, and possibily a ton of drivers, manually managing ports or at least manually checking/setting the port for the driver service can help.

I do this like this: I get all currently active TcpConnections(local endpoints). I create a random port from a given range for the driver service until the assigned port is not currently being used.

var ipGlobalProperties = IPGlobalProperties.GetIPGlobalProperties();
var tcpConnInfoArray = ipGlobalProperties.GetActiveTcpConnections();
do
{
   driverService.Port = Random.Next(29999,65535);
} while (tcpConnInfoArray.Any(d => d.LocalEndPoint.Port == driverService.Port));

score 0 · Answer 6 · answered Feb 24 '22 at 10:31

0

It seems that Selenium hosts a webserver on the localhost, which is not accessible. I disabled using a proxy for local addresses, and this solved the problem.

answered Feb 24 '22 at 10:31

Tamás Kovács

263
5
7

Cannot start the driver service on http://localhost

6 Answers6