Why is My Selenium Chrome Driver Failing to Start and How Can I Fix It?

Selenium: Troubleshooting "WebDriverException: Chrome Failed to Start" Error

Problem:

After switching computers, users report encountering issues launching Chrome with Selenium. Attempts to launch Firefox also fail, with the browser instance remaining unresponsive.

Error Message:

selenium.common.exceptions.WebDriverException: Message: unknown error: Chrome failed to start: crashed
  (unknown error: DevToolsActivePort file doesn't exist)
  (The process started from chrome location /opt/google/chrome/google-chrome is no longer running, so ChromeDriver is assuming that Chrome has crashed.)
  (Driver info: chromedriver=2.43.600233, platform=Linux 4.15.0-38-generic x86_64)

Possible Solutions:

1. Update Chrome and ChromeDriver:

Ensure that the latest versions of both Chrome and ChromeDriver are installed. You can download the latest ChromeDriver from the official ChromeDriver website.

2. Use Headless Chrome:

Try using headless Chrome, which runs without a graphical user interface. This can help avoid conflicts with other running processes. To use headless Chrome, add the following arguments to your chrome_options:

chrome_options = Options()
chrome_options.add_argument('--headless')
chrome_options.add_argument('--no-sandbox')
chrome_options.add_argument('--disable-dev-shm-usage')

3. Check for System Conflicts:

Verify that no other processes are using the port that Chrome uses for DevTools (usually port 9222). Close any such processes or adjust the port setting in the chrome_options.

4. Set Chrome Executable Path:

Manually specify the path to the Chrome executable in your code:

chrome_options.add_experimental_option('debuggerAddress', '127.0.0.1:9222')
d = webdriver.Chrome(executable_path='/opt/google/chrome/google-chrome', chrome_options=chrome_options)

5. Try Using a Different Browser:

If all else fails, try launching a different browser with Selenium, such as Firefox or Safari. This can help isolate the issue to Chrome specifically.

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