Could not initialize class org.openqa.selenium.os.Kernel32 - selenium-grid2

Question

I am new to Selenium grid. My hub and the node is running. I tried a test to automate in the node. But I am getting the error "Could not initialize class org.openqa.selenium.os.Kernel32". I could not find the solution anywhere. Please help
My code is :
import org.testng.Assert;
import org.testng.annotations.AfterTest;
import org.testng.annotations.BeforeTest;
import org.testng.annotations.Test;
import org.openqa.selenium.Platform;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.remote.DesiredCapabilities;
import org.openqa.selenium.remote.RemoteWebDriver;
import java.net.URL;
import java.net.MalformedURLException;
public class TestGrid {
WebDriver driver;
String baseURL, nodeURL;
#BeforeTest
public void setup() throws MalformedURLException{
baseURL = "http://newtours.demoaut.com/";
nodeURL = "http://192.168.0.6:5566/wd/hub";
DesiredCapabilities capability = DesiredCapabilities.firefox();
capability.setBrowserName("firefox");
capability.setPlatform(Platform.WIN8);
driver = new RemoteWebDriver(new URL(nodeURL), capability);
}
#Test
public void verifyTitle() {
String actualTitle = driver.getTitle();
String expectedTitle = "Welcome: Mercury Tours";
Assert.assertEquals(actualTitle, expectedTitle);
}
#AfterTest
public void closeSetup(){
driver.quit();
}
}

Answer 1

I had the same problem. And there was another error message appearing frequently.
org.openqa.selenium.WebDriverException: Native library (com/sun/jna/windows-x86-64/jnidispatch.dll) not found in resource path ([file:/C:/Users/admin/work/Selenium-batch-files/Windows/selenium-server-standalone-2.47.1.jar])
To solve the problem, I manually create selenium standalone jar file with jnidispatch.dll in correct path.
The steps below.
1) unzip selenium-server-standalone-2.47.1.jar using 7-zip. Then find out the "jnidispatch.dll" does exist, but no /com/sun/jna/windows-x86-64/ directory.
2) Create a directory .../com/sun/jna/windows-x86-64/ and copy "jnidispatch.dll" in.
3) create jar file.
"C:\Program Files\Java\jdk1.8.0_45\bin\jar.exe" cf yournewselenium.jar *
Note: you need to be in unzipped folder.
4) To run runSeleniumHub.bat and runSeleniumNode.bat, still complain "no menifest attribute". To fix this, change file
From:
call java -jar selenium-server-standalone-2.47.1.jar -role hub
To:
call java -cp yournewselenium.jar org.openqa.grid.selenium.GridLauncher -role hub
And on runSeleniumNode.batch
From:
call java -Dos.name=windows -Dwebdriver.chrome.driver=chromedriver.exe -Dwebdriver.ie.driver=IEDriverServer.exe -jar selenium-server-standalone-2.47.1.jar -role node -hub http://localhost:4444/grid/register -browser "browserName=internet explorer,version=11,platform=WINDOWS" -browser "browserName=chrome,platform=WINDOWS" -browser "browserName=firefox,platform=WINDOWS"
To:
call java -Dos.name=windows -Dwebdriver.chrome.driver=chromedriver.exe -Dwebdriver.ie.driver=IEDriverServer.exe -cp yournewselenium.jar org.openqa.grid.selenium.GridLauncher -role node -hub http://localhost:4444/grid/register -browser "browserName=internet explorer,version=11,platform=WINDOWS" -browser "browserName=chrome,platform=WINDOWS" -browser "browserName=firefox,platform=WINDOWS"
After the above changes, the problem is fixed. The error message not appear any more.

Answer 2

just dont use parameters
os.name, os.arch, os.version
when you run command
java -jar selenium-server-standalone-xxx.jar
(solution was tested on windows 10)

Answer 3

I was facing the same problem. After using proper URL, my problem has gone.
You should try with: http://www.yoursite.com
Also have a look here: https://stackoverflow.com/a/22149459/4921776