Selenium Grid in Java: org.openqa.selenium.SessionNotCreatedException: invalid argument: can't kill an exited process

Question

I've wanted to write a Selenium Grid app in Java.

On http://localhost:4444/grid/console it says that the node is connected to the hub.

On the client-side I've wanted to write the following:

try {
        DesiredCapabilities capability = DesiredCapabilities.firefox();

        WebDriver driver = new RemoteWebDriver(new URL("http://IP of Hub:4444/wd/hub"), capability);
        capability.setBrowserName("firefox");
        driver.get("https://www.google.com");

} catch (MalformedURLException ex) {
        System.err.println("URL Exception: "+ex.getMessage());
}

Unfortunately, the following exception was thrown when running the client app:

    Exception in thread "main" org.openqa.selenium.SessionNotCreatedException: invalid argument: can't kill an exited process
...
Driver info: driver.version: unknown

Answer 1

Provide geckodriver path before initializing a webdriver instance,

try {
     DesiredCapabilities capability = DesiredCapabilities.firefox();
     System.setProperty("webdriver.gecko.driver", "/PATH_OF_DRIVER/geckodriver.exe");
     driver = new RemoteWebDriver(new URL("http://Hub_IP/wd/hub"), capability);
     capability.setBrowserName("firefox");
     driver.get("https://www.google.com");

} catch (MalformedURLException ex) {
     System.err.println("URL Exception: "+ex.getMessage());
}

Answer 2

Solution: There was something wrong with the geckodriver in Linux (node). I added a node on a Windows PC and it worked.