Summary
The org.openqa.selenium.SessionNotCreatedException is a common issue encountered when using Selenium WebDriver, particularly when configuring ChromeDriver. This exception occurs when Selenium is unable to create a new session, often due to version mismatches between the Chrome browser and ChromeDriver, or issues with the WebDriverManager configuration. In this case, the user has ensured that the Chrome browser and ChromeDriver versions are identical, yet the exception persists.
Root Cause
The root cause of this issue can be attributed to several factors, including:
- Version mismatch: Although the user has specified the correct version, there might be other dependencies or configurations that are causing a mismatch.
- Cache issues: The user is flushing the cache, but there could be other cache-related problems that are not being addressed.
- WebDriverManager configuration: The configuration of WebDriverManager might be incorrect or incomplete, leading to issues with the ChromeDriver setup.
- System or environment issues: There could be system or environment-related issues that are preventing the Chrome process from being created.
Why This Happens in Real Systems
This issue can occur in real systems due to various reasons, including:
- Inconsistent dependencies: Dependencies might be inconsistent across different environments or systems, leading to version mismatches.
- Incorrect configurations: Configurations might be incorrect or incomplete, causing issues with the WebDriver setup.
- System updates: System updates can sometimes cause issues with the Chrome browser or ChromeDriver, leading to version mismatches or other problems.
- Network or connectivity issues: Network or connectivity issues can prevent the Chrome process from being created.
Real-World Impact
The impact of this issue can be significant, including:
- Test failures: Test failures can occur due to the inability to create a new session, leading to delays in testing and deployment.
- Deployment issues: Deployment issues can arise due to the inability to automate testing, leading to delays in releasing new features or updates.
- Increased maintenance: Increased maintenance is required to troubleshoot and resolve the issue, taking away from other important tasks.
- Reduced productivity: Reduced productivity can occur due to the time spent troubleshooting and resolving the issue.
Example or Code
String targetVersion = "145.0.7632.26";
WebDriverManager.chromedriver().clearDriverCache().browserVersion(targetVersion).setup();This code snippet demonstrates how to specify the target version of ChromeDriver using WebDriverManager.
How Senior Engineers Fix It
Senior engineers can fix this issue by:
- Verifying dependencies: Verifying that all dependencies are consistent and up-to-date.
- Checking configurations: Checking that all configurations are correct and complete.
- Troubleshooting system issues: Troubleshooting system or environment-related issues that might be preventing the Chrome process from being created.
- Using debugging tools: Using debugging tools to identify and resolve the issue.
Why Juniors Miss It
Juniors might miss this issue due to:
- Lack of experience: Lack of experience with Selenium WebDriver and ChromeDriver.
- Insufficient knowledge: Insufficient knowledge of the dependencies and configurations required for Selenium WebDriver.
- Inadequate troubleshooting: Inadequate troubleshooting skills, leading to an inability to identify and resolve the issue.
- Overlooking details: Overlooking important details, such as version mismatches or cache issues.