org.openqa.selenium.SessionNotCreatedException: Unable to find a matching set of capabilities while initiating Firefox v37 through Selenium v3.11.0

Question

I am trying to run test a run a website in Firefox, but I am getting error "The path to the driver executable must be set by the webdriver.gecko.driver system property;" I have set the path correctly, still don't know where the problem is. Here is my code:

if (browsers.equalsIgnoreCase("Firefox")) 
{
 String driverPath = System.getProperty("user.dir") + "\\src/test/java\\drivers\\geckodriver.exe";
 System.setProperty("webdriver.firefox.marionette", "false");
 driver = new FirefoxDriver();
 driver.manage().timeouts().implicitlyWait(30, TimeUnit.SECONDS);
 } else if (browsers.equalsIgnoreCase("Chrome")) {
 // String driverPath = System.getProperty("user.dir") +
 // "\\src\\Drivers\\chromedriver";
 // System.setProperty("webdriver.chrome.driver", driverPath);
 System.setProperty("webdriver.chrome.driver", "D:\\chromedriver.exe");
 driver = new ChromeDriver();
 driver.manage().timeouts().implicitlyWait(30, TimeUnit.SECONDS);
 }

Here is the Failure Trace of my code:

FAILED CONFIGURATION: @BeforeClass launchBrowser
org.openqa.selenium.SessionNotCreatedException: Unable to find a matching set of capabilities
Build info: version: '3.8.0', revision: '924c4067df', time: '2017-11-30T11:36:59.109Z'
System info: host: 'DSCHD-PC-180', ip: '192.168.6.122', os.name: 'Windows 7', os.arch: 'amd64', os.version: '6.1', java.version: '1.8.0_161'
Driver info: driver.version: FirefoxDriver
remote stacktrace: 
 at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
 at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
 at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
 at java.lang.reflect.Constructor.newInstance(Unknown Source)
 at org.openqa.selenium.remote.W3CHandshakeResponse.lambda$new0ドル(W3CHandshakeResponse.java:57)
 at org.openqa.selenium.remote.W3CHandshakeResponse.lambda$getResponseFunction2ドル(W3CHandshakeResponse.java:104)
 at org.openqa.selenium.remote.ProtocolHandshake.lambda$createSession0ドル(ProtocolHandshake.java:123)
 org.openqa.selenium.remote.ProtocolHandshake.createSession(ProtocolHandshake.java:126)
 at org.openqa.selenium.remote.ProtocolHandshake.createSession(ProtocolHandshake.java:73)
 at org.openqa.selenium.remote.HttpCommandExecutor.execute(HttpCommandExecutor.java:142)
 at org.openqa.selenium.remote.service.DriverCommandExecutor.execute(DriverCommandExecutor.java:83)
 at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:601)
 at org.openqa.selenium.remote.RemoteWebDriver.startSession(RemoteWebDriver.java:219)
 at org.openqa.selenium.remote.RemoteWebDriver.<init>(RemoteWebDriver.java:142)
 at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:120)
 at Utility.UtilityMethods.openBrowser(UtilityMethods.java:26)
 at TestCases.LoginTestCase.launchBrowser(LoginTestCase.java:35)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
 at java.lang.reflect.Method.invoke(Unknown Source)
 at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:124)
 at org.testng.internal.MethodInvocationHelper.invokeMethodConsideringTimeout(MethodInvocationHelper.java:59)
 at org.testng.internal.Invoker.invokeConfigurationMethod(Invoker.java:455)
 at org.testng.internal.Invoker.invokeConfigurations(Invoker.java:222)
 at org.testng.internal.Invoker.invokeConfigurations(Invoker.java:142)
 at org.testng.internal.TestMethodWorker.invokeBeforeClassMethods(TestMethodWorker.java:168)
 at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:105)
 at org.testng.TestRunner.privateRun(TestRunner.java:648)
 at org.testng.TestRunner.run(TestRunner.java:505)
 at org.testng.SuiteRunner.runTest(SuiteRunner.java:455)
 at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:450)
 at org.testng.SuiteRunner.privateRun(SuiteRunner.java:415)
 at org.testng.SuiteRunner.run(SuiteRunner.java:364)
 at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
 at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:84)
 at org.testng.TestNG.runSuitesSequentially(TestNG.java:1208)
 at org.testng.TestNG.runSuitesLocally(TestNG.java:1137)
 at org.testng.TestNG.runSuites(TestNG.java:1049)
 at org.testng.TestNG.run(TestNG.java:1017)
 at org.testng.remote.AbstractRemoteTestNG.run(AbstractRemoteTestNG.java:114)
 at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:251)
 at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:77)
SKIPPED CONFIGURATION: @AfterClass quitBrowser
SKIPPED: registration 

• Larry: This is a potential duplicate issue. Please see the following: stackoverflow.com/questions/38676719/…

Answer 1

To keep things simple, as you are using Selenium Client v3.11.0 and Firefox v37 you need to download the latest GeckoDriver from mozilla/geckodriver and save it any where within your system. Next within the System.setProperty() line pass the Key webdriver.gecko.driver along with the Value as the absolute path of the GeckoDriver and finally through DesiredCapabilities class set the capability marionatte to false and merge into an instance of FirefoxOptions instance to initiate the Firefox browser as follows :

System.setProperty("webdriver.gecko.driver", "C:/path/to/geckodriver.exe");
DesiredCapabilities dc = new DesiredCapabilities();
dc.setCapability("marionatte", false);
FirefoxOptions opt = new FirefoxOptions();
opt.merge(dc);
FirefoxDriver driver = new FirefoxDriver(opt);
driver.get("https://stackoverflow.com");
System.out.println("Application opened");
System.out.println("Page Title is : "+driver.getTitle());
driver.quit();

---

Update

As per your comment update you are using GeckoDriver v0.20.1.

But if you look back at the Release Notes of GeckoDriver v0.18.0 it clearly mentions :

geckodriver now recommends Firefox 53 and greater

So using GeckoDriver v0.18.0 and above you have to mandatory use Firefox 53 and greater. To get rid of this constraint you can downgrade either to any of these versions :

• GeckoDriver v0.17.0
• GeckoDriver v0.16.1

• Rohn Kerry: This code is giving me error " Unable to find a matching set of capabilities", That mean it did not have set the capability marionatte to "false"
• Rohn Kerry: Just to update you , I have done some changes- dc.setCapability("marionatte", false); FirefoxDriver driver = new FirefoxDriver(dc); ....This have initiated the Firefox browser but now I am getting the error "connection refused", Why is this happening?
• undetected Selenium: @RohnKerry Update the question with the complete error stack trace for further analysis please
• Rohn Kerry: I have found the solution for that. The code is : System.setProperty("webdriver.firefox.marionette","D:\\geckodriver.exe")
• Rohn Kerry: My geckodriver version is- geckodriver-v0.20.1

Answer 2

This is how system property is set:

System.setProperty("webdriver.gecko.driver", "C:\\...\\geckodriver.exe");

Answer 3

I had this error for 2 days, the solution for me was in Set.Platform, put Platform.ANY or Platform.Windows because Platform.WIN10 not worked, marionette wasn't necessary.

public class Main { public static RemoteWebDriver driver;
public static void main(String[] args) throws MalformedURLException {
 System.setProperty("webdriver.gecko.driver", "D:/Lib/geckodriver.exe");
 DesiredCapabilities desiredCapabilities = new 
 DesiredCapabilities().firefox();
 desiredCapabilities.setPlatform(Platform.ANY);
 desiredCapabilities.setBrowserName("firefox");
 driver = new RemoteWebDriver(new URL("http://172.20.19.182:5557/wd/hub"), 
 desiredCapabilities);
 driver.navigate().to("http://www.google.com");
 driver.findElementByName("q").sendKeys("execute automation");
 driver.findElementByName("q").sendKeys(Keys.ENTER);
 driver.close();
 // write your code here
}

Answer 4

you are using user.dir that basically means : current working directory

Here is the code that let you initialize firefox browser using selenium.

public static void main(String[] args) {
 System.setProperty("webdriver.gecko.driver", "C:\\your\\gecko\\driver\\path\\geckodriver.exe");
 driver = new firefoxDriver();

That's it ! you can use Firefox driver to performs several operations like :

1. driver.get(String args0);
2. driver.getCurrentUrl();
3. driver.getPageSource();
4. driver.getTitle();
5. driver.findElememt(By args0);
6. driver.findElements(By args0);
7. driver.naviagate();
8. driver.manage();
9. driver.close();
10. driver.quit();
11. driver.switchTo();
12. driver.getWindowHandle();
13. driver.getWindowHandles();

Please let me know if you have any concerns related to this.

• Rohn Kerry: That is correct but the issue is, I am using firefox version 37, So I have to put marionette= false. Now we can send only two string values in .setProperty.So where I can put the path to the geckodriver?
• cruisepandey: Which version of selenium you are using with FF37?
• Rohn Kerry: Like can we do that- System.setProperty("webdriver.firefox.marionette=false", "driverPath"); ?
• Rohn Kerry: I am using selenium 3.11.0
• cruisepandey: @RohnKerry : I'm not sure about this. Give me some time, if I will find anything, I will update you !

Answer 5

Just updated your code. You will have to set driver path while setProperty and user webdriver.gecko.driver for latest firefox driver.

 if (browsers.equalsIgnoreCase("Firefox")) {
 String driverPath = System.getProperty("user.dir") + "\\src\\test\\java\\drivers\\geckodriver.exe"; 
 System.setProperty("webdriver.firefox.driver", "driverPath"); 
 DesiredCapabilities capabilities = new DesiredCapabilities();
 capabilities.setCapability("marionette", false); 
 FirefoxOptions options = new FirefoxOptions(); 
 options.merge(capabilities);
 FirefoxDriver driver = new FirefoxDriver(options);
 driver.manage().timeouts().implicitlyWait(30, TimeUnit.SECONDS);
 } 
 else if (browsers.equalsIgnoreCase("Chrome")) {
 // String driverPath = System.getProperty("user.dir") +
 // "\\src\\Drivers\\chromedriver";
 // System.setProperty("webdriver.chrome.driver", driverPath);
 System.setProperty("webdriver.chrome.driver", "D:\\chromedriver.exe");
 driver = new ChromeDriver();
 driver.manage().timeouts().implicitlyWait(30, TimeUnit.SECONDS);
 }

Let me know.

• Rohn Kerry: But the problem is I am not using latest firefox version, I am using ff version 37. That is why I have set the marionette= false, for compatibility.
• BhavinD.: @RohnKerry, the latest Firefox version is 59 and you don't need to set marionette for that if you are using ff version 37 then you have to use compatible firefoxdriver.exe
• Rohn Kerry: So you mean to say that I have to download a compatible Firefox Webdriver for ff version 37?
• BhavinD.: No need to download. you can use latest FireFox geckodriver and you can set marionette=false using DesiredCapabilities class.
• Rohn Kerry: Yes I have already did that but the problem is you can pass two values to the .setProperty() and I have to also give path to geckodriver in that.