Starting Selenium Grid with Selenium 4 for C#

Question

I am having issues running Selenium Grid from Visual Studio from Csharp using Selenium 4. I keep getting the error:

Message:

System.InvalidOperationException : Could not start a new session. Could not start a new session. Error while creating session with the driver service. Stopping driver service: Driver server process died prematurely.
Build info: version: '4.1.1', revision: 'e8fcc2cecf'
System info: host: 'ATTPA-1450', ip: '172.26.0.1', os.name: 'Windows 10', os.arch: 'amd64', os.version: '10.0', java.version: '11.0.12'
Driver info: driver.version: unknown
Build info: version: '4.1.1', revision: 'e8fcc2cecf'
System info: host: 'ATTPA-1450', ip: '172.26.0.1', os.name: 'Windows 10', os.arch: 'amd64', os.version: '10.0', java.version: '11.0.12'
Driver info: driver.version: unknown
Build info: version: '4.1.1', revision: 'e8fcc2cecf'
System info: host: 'ATTPA-1450', ip: '172.26.0.1', os.name: 'Windows 10', os.arch: 'amd64', os.version: '10.0', java.version: '11.0.12'
Driver info: driver.version: unknown (SessionNotCreated)
TearDown : System.NullReferenceException : Object reference not set to an instance of an object.

Stack Trace:

WebDriver.UnpackAndThrowOnError(Response errorResponse)
WebDriver.Execute(String driverCommandToExecute, Dictionary`2 parameters)
WebDriver.StartSession(ICapabilities desiredCapabilities)
WebDriver.ctor(ICommandExecutor executor, ICapabilities capabilities)
RemoteWebDriver.ctor(ICommandExecutor commandExecutor, ICapabilities desiredCapabilities)
RemoteWebDriver.ctor(Uri remoteAddress, ICapabilities desiredCapabilities, TimeSpan commandTimeout)
WebDriverFactory.OpenBrowser() line 28
BaseTest.Test_Setup() line 54*

Can you tell me what I am missing. I downloaded the .jar file from this location - https://www.selenium.dev/downloads/

I started selenium hub on my local machine here:

I then registered selenium node here:

I made sure I can get to grid here:

Here is my code (I initially used http://localhost:4444/wd/hub) but still got the same error:

When I change the code to

I get this error

_driver = new RemoteWebDriver(new Uri("http://localhost:4444/wd/hub"), browserOptions);

Message:

OpenQA.Selenium.WebDriverException : The HTTP request to the remote WebDriver server for URL http://localhost:4444/wd/hub/session timed out after 60 seconds.
  ----> System.Threading.Tasks.TaskCanceledException : The operation was canceled.
  ----> System.IO.IOException : Unable to read data from the transport connection: The I/O operation has been aborted because of either a thread exit or an application request..
  ----> System.Net.Sockets.SocketException : The I/O operation has been aborted because of either a thread exit or an application request.
TearDown : System.NullReferenceException : Object reference not set to an instance of an object.*

score 0 · Answer 1 · answered Jan 17 '22 at 19:52

This error message...

System.InvalidOperationException : Could not start a new session. Could not start a new session. Error while creating session with the driver service. Stopping driver service: Driver server process died prematurely.
Build info: version: '4.1.1', revision: 'e8fcc2cecf'
System info: host: 'ATTPA-1450', ip: '172.26.0.1', os.name: 'Windows 10', os.arch: 'amd64', os.version: '10.0', java.version: '11.0.12'
Driver info: driver.version: unknown

...implies that the ChromeDriver was unable to initiate/spawn a new Browsing Context i.e. Chrome Browser session.

Possibly your main issue is the incompatibility between the version of the binaries you are using as the ChromeDriver version is not getting detected:

Driver info: driver.version: unknown

Solution

Ensure that:

ChromeDriver is updated to current ChromeDriver 97.0.4692.71 level.
Chrome is updated to current chrome=Version 97.0.4692.71 (as per chrome=97.0.4692.71 release notes).

Starting Selenium Grid with Selenium 4 for C#

1 Answers1

Solution