Parameter Exception - was passed main parameter but no main parameter was defined in your arg class while launching Selenium Grid Node

Question

Error:

Parameter Exception - was passed main parameter but no main parameter was defined in your arg class

Snapshot of the error:

Hub - 10.72.24.148:5555

I am running node using command line:

java -Dwebdriver.gecko.driver="C:\geckodriver.exe" -jar selenium-server-standalone-3.141.59.jar -role node -hub http://10.72.24.148:5555/grid/register -port 5566

Confrere

Answer 1

The command to launch the Selenium Grid Node is error prone. You need to drop the double quotes i.e. "..." around C:\geckodriver.exe and replace the single back slash i.e. \ with escaped back slash i.e. \\ as follows:

java -Dwebdriver.gecko.driver=C:\\geckodriver.exe -jar selenium-server-standalone-3.141.59.jar -role node -hub http://10.72.24.148:5555/grid/register -port 5566

Haffner

Hi, Could you please verify on what mistake am I making with this below command java -Dwebdriver.chrome.driver=C:\\chromedriver.exe -jar selenium-server-standalone-3.141.59.jar -role node -hub 10.130.106.33:4444/grid/register -port 5566 – Tailgate

When I run this command I see the following message Exception in thread "main" com.beust.jcommander.ParameterException: Was passed main parameter '-hub 10.130.106.33:4444/grid/register -port' but no main parameter was defined in y our arg class at com.beust.jcommander.JCommander.initMainParameterValue(JCommander.java:936) – Tailgate

My colleague able to access my gird console using 10.130.106.33:4444/grid/console using a browser. Could you please help me in understanding on what am I making. – Tailgate

@SrinivasanRamu Can you raise a new question with your new requirements please? – Haffner

It would have been more helpful for me, if someobody has pointed out me that the "browser" name for Firefox was gecko, not firefox, here as well. I was fighting with -dWebdriver.firefox.driver= and not getting any visibility of the fault cause. – Martens

Answer 2

Had the same error, above helps but also found in addition in Powershell, you have to use double quote, for example

java -"Dwebdriver.chrome.driver"=C:\Tools\chromedriver.exe  -jar .\selenium-server-standalone-3.141.59.jar

Above seems to work fine, note "Dwebdriver.chrome.driver"

Merow

Answer 3

I got the same error and fixed with this

java -Dwebdriver.chrome.driver=chromedriver.exe -jar selenium-server-standalone-3.9.1.jar -role node -hub http://192.168.1.185:4444/grid/register -maxSession 100 -browser browserName=”chrome”,version=ANY,platform=WINDOWS,maxInstances=50 

Hiccup