Getting unable to extract capabilities exception

[vinaybalepur]

Hi. Thanks for sharing the way to create our own capabilities. But I am getting following exception even after following all the steps you have specified. Please let me know how to fix this.

org.openqa.grid.common.exception.GridException: Cannot extract a capabilities from the request:
The extra capability I have provided is nodeName. If I do not pass this then the node call goes through. With this it is failing.

Few more details -
Selenium server - 3.14
Appium java client - 6.1.0

[krmahadevan]

@vinaybalepur - This doesn't seem to be a problem with Selenium, but looks to be a problem specific to the appium java client.

Here's a pure Selenium sample that still runs fine when using Selenium 3.14

import java.net.MalformedURLException;
import java.net.URL;
import org.openqa.selenium.remote.DesiredCapabilities;
import org.openqa.selenium.remote.RemoteWebDriver;
import org.testng.annotations.AfterClass;
import org.testng.annotations.BeforeClass;
import org.testng.annotations.Test;

public class Example {
  private RemoteWebDriver driver;

  @BeforeClass
  public void beforeClass() throws MalformedURLException {
    URL url = new URL("http://localhost:4444/wd/hub");
    DesiredCapabilities dc = DesiredCapabilities.chrome();
    dc.setCapability("nodeName", "dummy");
    driver = new RemoteWebDriver(url, dc);
  }

  @Test
  public void testMethod() {
    driver.get("http://www.google.com");
    System.err.println("Title " + driver.getTitle());
  }

  @AfterClass
  public void afterClass() {
    if (driver != null) {
      driver.quit();
    }
  }
}

Here are the logs from the selenium grid node.

18:07 $ java -jar selenium-server-standalone-3.14.0.jar -role node
18:07:41.585 INFO [GridLauncherV3.launch] - Selenium build info: version: '3.14.0', revision: 'aacccce0'
18:07:41.612 INFO [GridLauncherV3$3.launch] - Launching a Selenium Grid node on port 9741
2018-10-25 18:07:41.745:INFO::main: Logging initialized @548ms to org.seleniumhq.jetty9.util.log.StdErrLog
18:07:41.931 INFO [SeleniumServer.boot] - Selenium Server is up and running on port 9741
18:07:41.932 INFO [GridLauncherV3$3.launch] - Selenium Grid node is up and ready to register to the hub
18:07:41.991 INFO [SelfRegisteringRemote$1.run] - Starting auto registration thread. Will try to register every 5000 ms.
18:07:41.991 INFO [SelfRegisteringRemote.registerToHub] - Registering the node to the hub: http://localhost:4444/grid/register
18:07:42.562 INFO [SelfRegisteringRemote.registerToHub] - The node is registered to the hub and ready to use
18:10:38.001 INFO [ActiveSessionFactory.apply] - Capabilities are: {
  "browserName": "chrome",
  "version": ""
}
18:10:38.003 INFO [ActiveSessionFactory.lambda$apply$11] - Matched factory org.openqa.selenium.remote.server.ServicedSession$Factory (provider: org.openqa.selenium.chrome.ChromeDriverService)
Starting ChromeDriver 2.37.544337 (8c0344a12e552148c185f7d5117db1f28d6c9e85) on port 15476
Only local connections are allowed.
18:10:39.974 INFO [ProtocolHandshake.createSession] - Detected dialect: OSS
18:10:40.343 INFO [RemoteSession$Factory.lambda$performHandshake$0] - Started new session ad461ba6881a3fc8c238692fe718082a (org.openqa.selenium.chrome.ChromeDriverService)
18:10:42.601 INFO [ActiveSessions$1.onStop] - Removing session ad461ba6881a3fc8c238692fe718082a (org.openqa.selenium.chrome.ChromeDriverService)
18:16:21.430 INFO [ActiveSessionFactory.apply] - Capabilities are: {
  "browserName": "chrome",
  "nodeName": "dummy",
  "version": ""
}
18:16:21.431 INFO [ActiveSessionFactory.lambda$apply$11] - Matched factory org.openqa.selenium.remote.server.ServicedSession$Factory (provider: org.openqa.selenium.chrome.ChromeDriverService)
Starting ChromeDriver 2.37.544337 (8c0344a12e552148c185f7d5117db1f28d6c9e85) on port 17911
Only local connections are allowed.
18:16:22.687 INFO [ProtocolHandshake.createSession] - Detected dialect: OSS
18:16:22.744 INFO [RemoteSession$Factory.lambda$performHandshake$0] - Started new session 959230718a278ce2a4772ee38595f979 (org.openqa.selenium.chrome.ChromeDriverService)
18:16:24.916 INFO [ActiveSessions$1.onStop] - Removing session 959230718a278ce2a4772ee38595f979 (org.openqa.selenium.chrome.ChromeDriverService)

I haven't tried anything using appium client... Do you have a simple standalone sample that can be used to reproduce this issue ? Please share a simple one, so that I can easily run it. I haven't setup appium on my machine for a very long time.

[vinaybalepur]

Thank you for the information. I can provide the code. But appium has to be set up for running it. Othere wise will not be possible.

[krmahadevan]

@vinaybalepur - I am not asking for an appium setup. I am asking for a simple standalone test that can be executed to reproduce the issue. Also please ensure that the sample relies on using the demo app from appium.