What is the 1SessionNotCreatedException?
The 1SessionNotCreatedException is a frustrating error that can bring your automation testing to a grinding halt. It’s an exception that occurs when Selenium WebDriver is unable to create a new session, leaving you with a cryptic error message that’s as puzzling as it is infuriating.
The Error Message
The error message itself is quite vague, providing little insight into the root cause of the issue:
org.openqa.selenium.SessionNotCreatedException: Could not start a new session. Possible causes are invalid address of the remote server or browser start-up failure.This error message can be triggered by a variety of factors, making it a challenging issue to troubleshoot and resolve.
Common Causes of the 1SessionNotCreatedException
Before we dive into the solution, it’s essential to understand the common causes of the 1SessionNotCreatedException. Here are some of the most frequent culprits:
- Invalid Remote Server Address: This is perhaps the most common cause of the 1SessionNotCreatedException. If the remote server address is incorrect or invalid, Selenium WebDriver will be unable to establish a connection, leading to the exception.
- Browser Start-up Failure: Sometimes, the browser may fail to start, causing the exception to occur. This can be due to various reasons, including incorrectly configured browser settings or corrupted browser files.
- Incompatible Browser Version: Using an incompatible browser version with the Selenium WebDriver can trigger the 1SessionNotCreatedException. It’s essential to ensure that the browser version is compatible with the Selenium WebDriver version.
- Driver executable issues: Corrupted or outdated driver executables can cause the 1SessionNotCreatedException. Make sure to use the correct and up-to-date driver executable for your browser.
- Firewall or Network Issues: Firewall or network issues can prevent Selenium WebDriver from establishing a connection with the remote server, leading to the exception.
- Java Runtime Environment (JRE) Issues: Issues with the JRE, such as an outdated or corrupted version, can cause the 1SessionNotCreatedException.
Solving the 1SessionNotCreatedException
Now that we’ve covered the common causes of the 1SessionNotCreatedException, let’s dive into the solutions. Here are some step-by-step instructions to help you resolve the issue:
Step 1: Verify the Remote Server Address
Double-check the remote server address to ensure it’s correct and valid. Make sure to use the correct protocol (http or https) and the correct port number.
DesiredCapabilities capabilities = DesiredCapabilities.chrome();
capabilities.setBrowserName("chrome");
capabilities.setVersion("latest");
capabilities.setPlatform("Windows 10");
URL url = new URL("http://localhost:4444/wd/hub");
RemoteWebDriver driver = new RemoteWebDriver(url, capabilities);Step 2: Check Browser Start-up
Verify that the browser is starting correctly by checking the browser logs for any errors. You can do this by setting the browser’s log level to debug:
System.setProperty("webdriver.chrome.logfile", "chromedriver.log");
System.setProperty("webdriver.chrome.verbose", "true");This will create a log file that contains detailed information about the browser’s start-up process.
Step 3: Ensure Compatible Browser Version
Make sure to use a compatible browser version with the Selenium WebDriver. You can check the compatible versions on the official Selenium WebDriver website:
| Selenium WebDriver Version | Compatible Browser Version |
|---|---|
| 3.14.159 | Chrome 73-75 |
| 3.141.59 | Chrome 72-74 |
| 3.14.0 | Chrome 71-73 |
Step 4: Update Driver Executables
Ensure that you’re using the correct and up-to-date driver executable for your browser. You can download the latest driver executables from the official Selenium WebDriver website:
System.setProperty("webdriver.chrome.driver", "path/to/chromedriver.exe");Step 5: Check Firewall and Network Issues
Verify that there are no firewall or network issues that could be preventing Selenium WebDriver from establishing a connection with the remote server. Check your firewall settings and ensure that the necessary ports are open.
Step 6: Check JRE Issues
Ensure that you’re using the correct and up-to-date JRE version. You can check the JRE version by running the following command:
java -versionIf you’re using an outdated or corrupted JRE version, update to the latest version and try running your tests again.
Conclusion
The 1SessionNotCreatedException can be a frustrating issue to resolve, but by following these step-by-step instructions, you should be able to identify and fix the root cause of the problem. Remember to:
- Verify the remote server address
- Check browser start-up
- Ensure compatible browser version
- Update driver executables
- Check firewall and network issues
- Check JRE issues
By following these steps, you should be able to resolve the 1SessionNotCreatedException and get your automation testing up and running smoothly.
Additional Tips and Resources
If you’re still experiencing issues, here are some additional tips and resources to help you troubleshoot the problem:
- Check the Selenium WebDriver documentation for the latest information on compatible browser versions and driver executables.
- Join the Selenium WebDriver community forum for help and support from other users.
- Check out the official Selenium WebDriver GitHub page for the latest updates and releases.
Remember, troubleshooting the 1SessionNotCreatedException requires patience, persistence, and a systematic approach. By following these steps and tips, you should be able to resolve the issue and get your automation testing back on track.
Frequently Asked Question
Get answers to your burning questions about the pesky “1SessionNotCreatedException: Could not start a new session. Possible causes are invalid address of the remote server or browser start-up failure” error!
What is a SessionNotCreatedException and why is it ruining my day?
A SessionNotCreatedException is an error that occurs when your automation tool (like Selenium) can’t create a new session with the browser. This usually happens when the browser can’t start or the remote server address is invalid. Don’t worry, it’s not the end of the world! We’re here to help you troubleshoot and get back to automated testing bliss.
How do I check if my remote server address is valid?
Easy peasy! Double-check that your remote server address is correct and that it’s not blocked by firewalls or other security measures. Make sure to copy-paste the address correctly, and if you’re using a cloud-based service, ensure you have the correct credentials. If all else fails, try pinging the remote server to see if it’s reachable.
What’s the deal with browser start-up failure?
Browser start-up failure can happen due to various reasons, such as incorrect browser version, missing dependencies, or even a simple typo in your code. Try updating your browser version, reinstalling dependencies, and reviewing your code for any typos. If you’re still stuck, try running your tests in a different browser or environment to isolate the issue.
Can I debug my code to identify the root cause of the error?
Absolutely! Debugging is your best friend in this situation. Enable verbose logging, set breakpoints, and inspect variables to identify where your code is failing. You can also try running your tests in a debug mode or using a tool like Selenium Grid to get more detailed logs. With some patience and persistence, you’ll be able to pinpoint the issue and fix it!
What if I’ve tried everything and still get the error?
Don’t throw your hands up in the air just yet! If you’ve exhausted all troubleshooting steps, it’s time to seek help from the community or an expert. Post your issue on online forums or seek help from a Selenium expert. Provide as much detail as possible about your environment, code, and error messages, and someone will be able to help you out. Remember, we’ve all been there, and there’s always a solution waiting to be found!
