Question

当我使用Python使用Selenium执行此代码时：

from selenium import webdriver
from selenium.webdriver.common.by import By
import time
driver = webdriver.Chrome(executable_path=r'/Users/qa/Documents/Python/chromedriver')

发生错误：

   Traceback (most recent call last):
  File "/Users/qa/Documents/Python/try.py", line 4, in <module>
    driver = webdriver.Chrome(executable_path=r'/Users/qa/Documents/Python/chromedriver')
  File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/selenium/webdriver/chrome/webdriver.py", line 81, in __init__
    desired_capabilities=desired_capabilities)
  File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/selenium/webdriver/remote/webdriver.py", line 157, in __init__
    self.start_session(capabilities, browser_profile)
  File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/selenium/webdriver/remote/webdriver.py", line 252, in start_session
    response = self.execute(Command.NEW_SESSION, parameters)
  File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/selenium/webdriver/remote/webdriver.py", line 321, in execute
    self.error_handler.check_response(response)
  File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/selenium/webdriver/remote/errorhandler.py", line 242, in check_response
    raise exception_class(message, screen, stacktrace)
selenium.common.exceptions.SessionNotCreatedException: Message: session not created
from disconnected: unable to connect to renderer
  (Session info: chrome=71.0.3578.98)
  (Driver info: chromedriver=2.44.609545 (c2f88692e98ce7233d2df7c724465ecacfe74df5),platform=Mac OS X 10.13.6 x86_64)

有人可以帮助我吗？谢谢。

Answer 1

此错误消息...

selenium.common.exceptions.SessionNotCreatedException: Message: session not created
from disconnected: unable to connect to renderer

...表示 ChromeDriver 无法启动/产生新的 WebBrowser ，即 Chrome浏览器会话。

您需要考虑一个事实：

在使用 Mac OS X 时，必须使用 Value 来支持 Key executable_path： / p>
```
'/Users/qa/Documents/Python/chromedriver'
```

因此行将是：

driver = webdriver.Chrome(executable_path='/Users/qa/Documents/Python/chromedriver')

注意：路径本身是原始路径，因此您无需添加开关r并将其放置。

另外，确保系统上的/etc/hosts包含以下条目：

127.0.0.1 localhost.localdomain localhost
#or
127.0.0.1 localhost loopback

Answer 2

在 linux 上遇到同样的问题，特别是 raspberry pi 4（所以是 arm cpu）。我使用了chromium-browser 和chromium-chromedriver 包。

这是我的代码：

browser = Chrome(executable_path = '/usr/bin/chromedriver', options = opts)

这是错误信息：

File "/usr/lib/python3.8/runpy.py", line 194, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "/usr/lib/python3.8/runpy.py", line 87, in _run_code
    exec(code, run_globals)
  File "/home/ubuntu/Documents/reliant-scrape/reliant_scrape.py", line 296, in <module>
    output = logon(config['headless'], config['download'], config['site'], config['creds'])
  File "/home/ubuntu/Documents/reliant-scrape/reliant_scrape.py", line 75, in logon
    browser = Chrome(executable_path = '/usr/bin/chromedriver', options = opts)
  File "/home/ubuntu/.local/lib/python3.8/site-packages/selenium/webdriver/chrome/webdriver.py", line 76, in __init__
    RemoteWebDriver.__init__(
  File "/home/ubuntu/.local/lib/python3.8/site-packages/selenium/webdriver/remote/webdriver.py", line 157, in __init__
    self.start_session(capabilities, browser_profile)
  File "/home/ubuntu/.local/lib/python3.8/site-packages/selenium/webdriver/remote/webdriver.py", line 252, in start_session
    response = self.execute(Command.NEW_SESSION, parameters)
  File "/home/ubuntu/.local/lib/python3.8/site-packages/selenium/webdriver/remote/webdriver.py", line 321, in execute
    self.error_handler.check_response(response)
  File "/home/ubuntu/.local/lib/python3.8/site-packages/selenium/webdriver/remote/errorhandler.py", line 242, in check_response
    raise exception_class(message, screen, stacktrace)
selenium.common.exceptions.SessionNotCreatedException: Message: session not created
from disconnected: unable to connect to renderer
  (Session info: headless chrome=88.0.4324.150)

然而，当我单独运行 chromedriver 时它工作正常吗？我也将这一行添加到 /etc/hosts 中，但这没有帮助。

Answer 3

我遇到了类似的错误，首先得到错误信息：

<块引用>

selenium.common.exceptions.WebDriverException：消息：未知错误：Chrome 无法启动：正常退出。（未知错误：DevToolsActivePort 文件不存在）

通过向 ChromeOptions() 添加 options.add_argument("--remote-debugging-port=9230") 解决了这个问题。程序运行一次，我收到了与上面相同的错误消息：

<块引用>

selenium.common.exceptions.SessionNotCreatedException：消息：会话未创建从断开连接：无法连接到渲染器（会话信息：无头 chrome=89.0.4389.114）

这里的问题是 chrome 进程没有在程序中正确关闭，因此该进程在调试端口上仍然处于活动状态。要解决此问题，请关闭活动端口 sudo kill -9 $(sudo lsof -t -i:9230) 并简单地将以下几行添加到代码末尾：

driver.stop_client()
driver.close()
driver.quit()

因为我没有在任何地方找到这个答案，我希望它对某人有帮助。

Answer 4

我在Windows 10计算机上遇到了同样的问题。解决该问题的方法是打开任务管理器并退出所有Python.exe进程以及所有Chrome.exe进程。完成此操作后，

SessionNotCreatedException：消息：会话未从断开连接创建：无法使用ChromeDriver 2.45 Chrome v71连接到渲染器

4 个答案: