"Incompatibility between Ruby + watir-webdriver and Selenium Grid2 causes an exception

Using selenium-server-standalone-2.18.0.jar. Configured the hub and node on the same host. Executing the client code on a separate host.

Observing in the hub console, I notice that one of the nodes has connected with 5 firefox icons. Upon running my client code, I witness that one of the firefox icons disappears, indicating that the hub has assigned the task to the connected node. There are no errors present in the hub logs. Launching the browser using ruby + watir-webdriver:

capabilities = WebDriver::Remote::Capabilities.firefox
b=Watir::Browser.new(:remote, :url => "http://[remote-host]:4444/wd/hub", :desired_capabilities => capabilities)

The encountered error is as follows:

from (irb):52>> b=Watir::Browser.new(:remote, :url => "http://[remote-host]:4444/wd/hub", :desired_capabilities => capabilities)
Selenium::WebDriver::Error::UnknownError: Error forwarding the new session request for webdriver should contain a location header with the session. (org.openqa.grid.common.exception.GridException)
...
rubyselenium-rcselenium-webdriverwatir-webdriverselenium-grid

Answer №1

Version 2.21.0 of Selenium Grid addressed numerous bugs and improvements. It is recommended to execute your tests using the latest JAR file.

Answer №2

Hello! I see that it's been quite some time since you first posted your question. Have you managed to find a solution for it yet? If not, here's a suggestion regarding the variable for capabilities that may help:

In my experience using Cucumber with Watir-webdriver and Selenium Grid2, I found success by utilizing an env.rb variable named browser_name. Here's how it was implemented:

def browser_name
  (ENV['BROWSER'] ||= 'firefox').downcase.to_sym
end

Subsequently, within the env.rb file:

Before do
    @browser = Watir::Browser.new(:remote, :url=>"http://[mygridhubhost]:4444/wd/hub", :desired_capabilities=> browser_name)

By initiating the test in this manner, it establishes a connection with the grid based on the specified browser_name value (defaulting to firefox if not explicitly set) before execution...

This configuration has proven effective for me, particularly when operating with Selenium Grid 2 version 2.31.

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