Tag Archives: Selenium.common.exceptions.WebDriverException

[Solved] selenium.common.exceptions.WebDriverException: Message: unknown error: DevToolsActivePort file doesn

Error Messages: selenium.common.exceptions.WebDriverException: Message: unknown error: DevToolsActivePort file doesn’t exist

Traceback (most recent call last):
  File "/opt/Vcert/myVcert/vul.py", line 2, in <module>
    from selenium import webdriver
ImportError: No module named selenium
Traceback (most recent call last):
  File "/opt/Vcert/myVcert/vul.py", line 228, in <module>
    main()
  File "/opt/Vcert/myVcert/vul.py", line 44, in main
    browser = my_browser()
  File "/opt/Vcert/myVcert/vul.py", line 31, in my_browser
    browser = webdriver.Chrome(executable_path='/opt/bin/chromedriver', chrome_options=chrome_options)
  File "/opt/py3/lib64/python3.6/site-packages/selenium/webdriver/chrome/webdriver.py", line 81, in __init__
    desired_capabilities=desired_capabilities)
  File "/opt/py3/lib64/python3.6/site-packages/selenium/webdriver/remote/webdriver.py", line 157, in __init__
    self.start_session(capabilities, browser_profile)
  File "/opt/py3/lib64/python3.6/site-packages/selenium/webdriver/remote/webdriver.py", line 252, in start_session
    response = self.execute(Command.NEW_SESSION, parameters)
  File "/opt/py3/lib64/python3.6/site-packages/selenium/webdriver/remote/webdriver.py", line 321, in execute
    self.error_handler.check_response(response)
  File "/opt/py3/lib64/python3.6/site-packages/selenium/webdriver/remote/errorhandler.py", line 242, in check_response
    raise exception_class(message, screen, stacktrace)
selenium.common.exceptions.WebDriverException: Message: unknown error: DevToolsActivePort file doesn't exist

 

Solution:
1. Kill chromedriver, kill webdriver, kill chrome.
2. Add browser.close() after each browser.

[Solved] Selenium.common.exceptions.WebDriverException: Message: newSession

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This is the error reported:

Traceback (most recent call last):
  File "D:\python-professional-workplace\pycharm projest\ArticleSpider\lib\site-packages\twisted\internet\defer.py", line 1386, in _inlineCallbacks
    result = g.send(result)
  File "D:\python-professional-workplace\pycharm projest\ArticleSpider\lib\site-packages\scrapy\crawler.py", line 81, in crawl
    start_requests = iter(self.spider.start_requests())
  File "D:\python--\scrapytest\Scripts\scrapypy3\Scripts\ArticleSpider\ArticleSpider\spiders\zhihu.py", line 68, in start_requests
    browser = webdriver.Firefox(executable_path="D:/python--/geckodriver.exe")
  File "D:\python-professional-workplace\pycharm projest\ArticleSpider\lib\site-packages\selenium\webdriver\firefox\webdriver.py", line 162, in __init__
    keep_alive=True)
  File "D:\python-professional-workplace\pycharm projest\ArticleSpider\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 154, in __init__
    self.start_session(desired_capabilities, browser_profile)
  File "D:\python-professional-workplace\pycharm projest\ArticleSpider\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 243, in start_session
    response = self.execute(Command.NEW_SESSION, parameters)
File "D:\python-professional-workplace\pycharm projest\ArticleSpider\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 312, in execute
    self.error_handler.check_response(response)
  File "D:\python-professional-workplace\pycharm projest\ArticleSpider\lib\site-packages\selenium\webdriver\remote\errorhandler.py", line 242, in check_response
    raise exception_class(message, screen, stacktrace)
selenium.common.exceptions.WebDriverException: Message: newSession

Solution:

1. The browser I use is Firefox. The main reason is that the version of geckodriver is too low, and the version of the browser is 64.0.

Update to v0.23.0: https://github.com/mozilla/geckodriver/releases

Put the downloaded geckodriver.exe into the Scripts folder under the python installation path.

Note: I set up a virtual environment, so geckodriver.exe is placed in a folder under the virtual environment, not under the scripts file.

2. Update the version of selenium (I updated the selenium first and then updated the geckodriver, so I am not sure if only updating geckodriver is useful, but only updating selenium is useless)

They are:

pip show selenium
python -m pip install --upgrade pip
pip install -U selenium

After the update, update selenium in pycharm.