'Connection refused! Is selenium server started?\n' while running Nightwatch.js tests against Selenium Grid

Question

I use Nightwatch-Cucumber based on Nightwatch.js to automate my tests. And now I want to use Selenium Grid with a Selenium hub and several Selenium

Answer 1

This error message...

message: 'Connection refused!

...implies that the Selenium Grid Node was unable to initiate/spawn a new WebClient i.e. Web Browsing session.

Your main issue is in the command being used to start / initialize Selenium Grid Node. The Selenium Grid Node should be started with the desired WebDriver variant as an argument as follows :

1. Start the Selenium Grid Hub (default on port 4444):

   java -jar selenium-server-standalone-3.9.1.jar -role hub
   

2. Start the Selenium Grid Node (default on port 5555):

   java -Dwebdriver.chrome.driver=C:/path/to/chromedriver.exe -jar selenium-server-standalone-3.9.1.jar -role node -hub http://localhost:4444/grid/register
   

You can find a similar detailed discussion in Connection refused! Is selenium server started nightwatch on edge