selenium: Chromedriver quit() method doesn't close all chrome.exe processes

OS: Windows 7 (64-bit) Selenium Version: 3.14 Browser: Chrome, Firefox

Browser Version:
Google Chrome 68.0.3440.106 (Official Build) (64-bit)

Expected Behavior -

chromedriver.exe processes to be closed. geckodriver.exe processes to be closed.

Actual Behavior -

Hello guys, since a month ago, we’re expecting some kind of problems trying to kill the chromedriver.exe and geckodriver.exe processes.

We usually run several tests simultaneously and when the TestSuite ends, many chromedriver.exe / geckodriver.exe processes still there on the system.

This problem causes the system goes slower and slower, causing at the end the system crashes.

This is the message we’re receiving from the driver:

Trace init:

Starting ChromeDriver 2.41.578737 (49da6702b16031c40d63e5618de03a32ff6c197e) on port 36461
Only local connections are allowed.
ago 21, 2018 1:59:03 PM org.openqa.selenium.remote.ProtocolHandshake createSession
INFO: Detected dialect: OSS

When we try to quit() the driver:

INFO: Unable to drain process streams. Ignoring but the exception being swallowed follows.
org.apache.commons.exec.ExecuteException: The stop timeout of 2000 ms was exceeded (Exit value: -559038737)
	at org.apache.commons.exec.PumpStreamHandler.stopThread(PumpStreamHandler.java:295)
	at org.apache.commons.exec.PumpStreamHandler.stop(PumpStreamHandler.java:181)
	at org.openqa.selenium.os.OsProcess.destroy(OsProcess.java:135)
	at org.openqa.selenium.os.CommandLine.destroy(CommandLine.java:153)
	at org.openqa.selenium.remote.service.DriverService.stop(DriverService.java:223)
	at org.openqa.selenium.remote.service.DriverCommandExecutor.execute(DriverCommandExecutor.java:95)
	at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:548)
	at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:605)
	at org.openqa.selenium.remote.RemoteWebDriver.quit(RemoteWebDriver.java:448)
	at utils.Utils.quit(Utils.java:2783)
	at utils.Utils.guardarResultado(Utils.java:2816)
	at com.bbva.ebcf.pon.LimitePonMismoUsuarioFirmando.tearDown(LimitePonMismoUsuarioFirmando.java:163)
	at junit.framework.TestCase.runBare(TestCase.java:140)
	at junit.framework.TestResult$1.protect(TestResult.java:110)
	at junit.framework.TestResult.runProtected(TestResult.java:128)
	at junit.framework.TestResult.run(TestResult.java:113)
	at junit.framework.TestCase.run(TestCase.java:124)
	at junit.framework.TestSuite.runTest(TestSuite.java:243)
	at junit.framework.TestSuite.run(TestSuite.java:238)
	at org.junit.internal.runners.JUnit38ClassRunner.run(JUnit38ClassRunner.java:83)
	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
	at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)

ago 22, 2018 9:31:43 AM org.openqa.selenium.os.OsProcess destroy
SEVERE: Unable to kill process java.lang.ProcessImpl@70eecdc2

This is not happening every single time, for example, if we try to reproduce the error in oir IDE’s it is almost impossible. It seems that is something related whith too many chrome processes running at the same time (My guess).

This is the method we call in every single test we run (in @After ) we close and quit the driver:

	public static void quitDriver(WebDriver driver)
	{

		try
		{

			driver.close();
		}
		catch(Exception e1)
		{
			
		}

		try
		{
			driver.quit();
		}
		catch(Exception e)
		{

		}

	}

And this is the way we start the driver:

	System.setProperty("webdriver.chrome.driver", "lib/chromedriver.exe");

	String downloads = new File("downloads").getAbsolutePath();				
	HashMap<String, Object> chromePrefs = new HashMap<String, Object>();
	chromePrefs.put("profile.default_content_settings.popups", 0);
	chromePrefs.put("download.default_directory", downloads);	
	chromePrefs.put("download.prompt_for_download", false);
	chromePrefs.put("download.directory_upgrade", true);

	ChromeOptions options = new ChromeOptions();
	options.setExperimentalOption("prefs", chromePrefs);
	options.addArguments("enable-automation");
	options.addArguments("start-maximized");
	options.addArguments("disable-popup-blocking");
	options.addArguments("disable-default-apps"); 
	//options.addArguments("--no-sandbox");
	options.addArguments("ignore-certificate-errors");
	
	LoggingPreferences logPrefs = new LoggingPreferences();
	logPrefs.enable(LogType.PERFORMANCE, Level.ALL);
	
	options.setCapability(CapabilityType.LOGGING_PREFS, logPrefs);
	options.setCapability(CapabilityType.ACCEPT_SSL_CERTS, true);
	
	driver = new ChromeDriver(options);

We have tried almost everything (we are 5 testing engineers working on the same project) and the processes are still there.

Windows can’t kill the process with taskkill /f /im chromedriver.exe

So… Please, if someone have some idea, we would appreciate it. We have read a lot, before opening this issue.

Thank you guys! Thank you community!