org.openqa.selenium.WebDriverException: java.net.ConnectException: Failed to connect to localhost/0:0:0:0:0:0:0:1:1941 with GeckoDriver and Selenium

Question

I am trying to use Eclipse to write a simple automated test and am having problems setting it up. I have not been able to launch firefox. My code is below and the error stack after that.

Code:

package cucumberTest;

import java.util.concurrent.TimeUnit;

import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.firefox.FirefoxDriver;

public class seleniumTest {

    private static WebDriver driver = null;

    public static void main(String[] args) {
        // TODO Auto-generated method stub

        //https://www.toolsqa.com/cucumber/first-cucumber-selenium-java-test/
        // new instance of frefox driver
        driver = new FirefoxDriver();

         //Put a Implicit wait, this means that any search for elements on the page 
         // could take the time the implicit wait is set for before throwing exception

        driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);

        //open page
         driver.get("http://www.store.demoqa.com");

Error Stack: this is what is displayed in the console window when I try to run the code in ECLIPSE.

Exception in thread "main" org.openqa.selenium.WebDriverException: java.net.ConnectException: Failed to connect to localhost/0:0:0:0:0:0:0:1:1941
Build info: version: '3.141.59', revision: 'e82be7d358', time: '2018-11-14T08:25:53'
System info: host: 'LAPTOP-P3SB6R8A', ip: '192.168.1.6', os.name: 'Windows 10', os.arch: 'amd64', os.version: '10.0', java.version: '1.8.0_161'
Driver info: driver.version: FirefoxDriver
    at org.openqa.selenium.remote.service.DriverCommandExecutor.execute(DriverCommandExecutor.java:92)
    at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:552)
    at org.openqa.selenium.remote.RemoteWebDriver.startSession(RemoteWebDriver.java:213)
    at org.openqa.selenium.remote.RemoteWebDriver.<init>(RemoteWebDriver.java:131)
    at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:147)
    at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:125)
    at cucumberTest.seleniumTest.main(seleniumTest.java:18)
Caused by: java.net.ConnectException: Failed to connect to localhost/0:0:0:0:0:0:0:1:1941
    at okhttp3.internal.connection.RealConnection.connectSocket(RealConnection.java:247)
    at okhttp3.internal.connection.RealConnection.connect(RealConnection.java:165)
    at okhttp3.internal.connection.StreamAllocation.findConnection(StreamAllocation.java:257)
    at okhttp3.internal.connection.StreamAllocation.findHealthyConnection(StreamAllocation.java:135)
    at okhttp3.internal.connection.StreamAllocation.newStream(StreamAllocation.java:114)
    at okhttp3.internal.connection.ConnectInterceptor.intercept(ConnectInterceptor.java:42)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:121)
    at okhttp3.internal.cache.CacheInterceptor.intercept(CacheInterceptor.java:93)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:121)
    at okhttp3.internal.http.BridgeInterceptor.intercept(BridgeInterceptor.java:93)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
    at okhttp3.internal.http.RetryAndFollowUpInterceptor.intercept(RetryAndFollowUpInterceptor.java:126)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:121)
    at okhttp3.RealCall.getResponseWithInterceptorChain(RealCall.java:200)
    at okhttp3.RealCall.execute(RealCall.java:77)
    at org.openqa.selenium.remote.internal.OkHttpClient.execute(OkHttpClient.java:103)
    at org.openqa.selenium.remote.ProtocolHandshake.createSession(ProtocolHandshake.java:105)
    at org.openqa.selenium.remote.ProtocolHandshake.createSession(ProtocolHandshake.java:74)
    at org.openqa.selenium.remote.HttpCommandExecutor.execute(HttpCommandExecutor.java:136)
    at org.openqa.selenium.remote.service.DriverCommandExecutor.execute(DriverCommandExecutor.java:83)
    ... 6 more
Caused by: java.net.ConnectException: Connection refused: connect
    at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
    at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source)
    at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
    at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
    at java.net.AbstractPlainSocketImpl.connect(Unknown Source)
    at java.net.PlainSocketImpl.connect(Unknown Source)
    at java.net.SocksSocketImpl.connect(Unknown Source)
    at java.net.Socket.connect(Unknown Source)
    at okhttp3.internal.platform.Platform.connectSocket(Platform.java:129)
    at okhttp3.internal.connection.RealConnection.connectSocket(RealConnection.java:245)
    ... 28 more

Please can someone help me identify what the problem is?

Answer 1

This error message...

Exception in thread "main" org.openqa.selenium.WebDriverException: java.net.ConnectException: Failed to connect to localhost/0:0:0:0:0:0:0:1:1941
Build info: version: '3.141.59', revision: 'e82be7d358', time: '2018-11-14T08:25:53'
System info: host: 'LAPTOP-P3SB6R8A', ip: '192.168.1.6', os.name: 'Windows 10', os.arch: 'amd64', os.version: '10.0', java.version: '1.8.0_161'
Driver info: driver.version: FirefoxDriver
.
Caused by: java.net.ConnectException: Failed to connect to localhost/0:0:0:0:0:0:0:1:1941

...implies that your program was unable to initiate/spawn a new GeckoDriver service.

While working with Selenium v3.x, GeckoDriver and Firefox to initiate a new GeckoDriver service and Firefox Browser session you need to pass the Key webdriver.gecko.driver along with the Value set as the absolute path of the GeckoDriver through the System.setProperty() line as follows :

System.setProperty("webdriver.gecko.driver", "C:\\path\\to\\geckodriver.exe");
driver = new FirefoxDriver();

Additionally,

• Your JDK version is 1.8.0_161 which is pretty old.
• Your Selenium Client version is v3.141.59.
• Your GeckoDriver version is unknown to us.
• Your Firefox version is unknown to us.

So there is a clear mismatch between the JDK v8u161 and Selenium Client v3.141.59.

Solution

• Upgrade JDK to recent levels JDK 8u202.
• Upgrade GeckoDriver to GeckoDriver v0.24.0 level.
• GeckoDriver is present in the specified location.
• GeckoDriver is having executable permission for non-root users.
• Upgrade Firefox version to Firefox v65.0 levels.
• Clean your Project Workspace through your IDE and Rebuild your project with required dependencies only.
• If your base Web Client version is too old, then uninstall it through Revo Uninstaller and install a recent GA and released version of Web Client.
• Take a System Reboot.
• Execute your Test as a non-root user.
• Always invoke driver.quit() within tearDown(){} method to close and destroy the WebDriver and Web Client instances gracefully.