WebDriverException was encountered while attempting to establish a connection with localhost/0:0:0:0:0:0:0:1:1941 using GeckoDriver and Selenium due to a java.net.ConnectException

I am currently facing an issue while trying to set up Eclipse for writing a basic automated test. Specifically, I am encountering difficulties in launching Firefox. Below is the code I have written along with the error stack that follows:

Here's the code snippet:

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");

The following is the Error Stack displayed in the console window when attempting 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

I would greatly appreciate any assistance in identifying and resolving this problem. Thank you!

javaseleniumfirefoxgeckodriverselenium-firefoxdriver

Answer №1

This particular 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

This indicates that the program failed to initialize a new GeckoDriver service.

If you are using Selenium v3.x, GeckoDriver and Firefox to start a new GeckoDriver service and Firefox Browser session, make sure to provide the correct Key webdriver.gecko.driver paired with the Value set as the absolute path of the GeckoDriver using the System.setProperty() method like this:

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

In addition,

  • Your JDK version is 1.8.0_161 which might be outdated.
  • The version of your Selenium Client is v3.141.59.
  • We do not have information about the versions of your GeckoDriver and Firefox.

Hence, there seems to be a mismatch between JDK v8u161 and Selenium Client v3.141.59.

Solution

  • Upgrade your JDK to the latest version such as JDK 8u202.
  • Update your GeckoDriver to GeckoDriver v0.24.0.
  • Make sure that GeckoDriver is available at the specified location.
  • Ensure that GeckoDriver has executable permission for non-root users.
  • Upgrade your Firefox to version Firefox v65.0.
  • Clean your Project Workspace in your IDE and rebuild the project with necessary dependencies only.
  • If your base Web Client version is too outdated, uninstall it using Revo Uninstaller and install a more recent version.
  • Reboot the system.
  • Execute your Test as a non-root user.
  • Always remember to include driver.quit() within the tearDown(){} method to close and destroy the instances of WebDriver and Web Client properly.

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