未知错误：会话因页面崩溃而从未知错误中删除：无法通过ChromeDriver Selenium崩溃的选项卡确定加载状态

Question

我正在使用使用Python和Selenium的InstaPy。我每个Cron都会启动脚本，并且有时会崩溃。所以它确实是不规则的，有时运行得很好。我也已经在GitHub
Repo上发布了消息，但是在那儿没有得到答案，所以我现在在这里问是否有人知道为什么。

这是一台数字海洋ubuntu服务器，我在无头模式下使用它。驱动程序版本在日志中可见。这是错误消息：

ERROR [2018-12-10 09:53:54] [user]  Error occurred while deleting cookies from web browser!
b'Message: invalid session id\n  (Driver info: chromedriver=2.44.609551 (5d576e9a44fe4c5b6a07e568f1ebc753f1214634),platform=Linux 4.15.0-42-generic x86_64)\n'
Traceback (most recent call last):
  File "/root/InstaPy/instapy/util.py", line 1410, in smart_run
    yield
  File "./my_config.py", line 43, in <module>
    session.follow_user_followers(['xxxx','xxxx','xxxx','xxxx'], amount=100, randomize=True, interact=True)
  File "/root/InstaPy/instapy/instapy.py", line 2907, in follow_user_followers
    self.logfolder)
  File "/root/InstaPy/instapy/unfollow_util.py", line 883, in get_given_user_followers
    channel, jumps, logger, logfolder)
  File "/root/InstaPy/instapy/unfollow_util.py", line 722, in get_users_through_dialog
    person_list = dialog_username_extractor(buttons)
  File "/root/InstaPy/instapy/unfollow_util.py", line 747, in dialog_username_extractor
    person_list.append(person.find_element_by_xpath("../../../*")
  File "/usr/local/lib/python3.6/dist-packages/selenium/webdriver/remote/webelement.py", line 351, in find_element_by_xpath
    return self.find_element(by=By.XPATH, value=xpath)
  File "/usr/local/lib/python3.6/dist-packages/selenium/webdriver/remote/webelement.py", line 659, in find_element
    {"using": by, "value": value})['value']
  File "/usr/local/lib/python3.6/dist-packages/selenium/webdriver/remote/webelement.py", line 633, in _execute
    return self._parent.execute(command, params)
  File "/usr/local/lib/python3.6/dist-packages/selenium/webdriver/remote/webdriver.py", line 321, in execute
    self.error_handler.check_response(response)
  File "/usr/local/lib/python3.6/dist-packages/selenium/webdriver/remote/errorhandler.py", line 242, in check_response
    raise exception_class(message, screen, stacktrace)
selenium.common.exceptions.WebDriverException: Message: unknown error: session deleted because of page crash
from unknown error: cannot determine loading status
from tab crashed
  (Session info: headless chrome=70.0.3538.110)
  (Driver info: chromedriver=2.44.609551 (5d576e9a44fe4c5b6a07e568f1ebc753f1214634),platform=Linux 4.15.0-42-generic x86_64)

During handling of the above exception, another exception occurred:

    Traceback (most recent call last):
  File "/root/InstaPy/instapy/instapy.py", line 3845, in end
    self.browser.delete_all_cookies()
  File "/usr/local/lib/python3.6/dist-packages/selenium/webdriver/remote/webdriver.py", line 878, in delete_all_cookies
    self.execute(Command.DELETE_ALL_COOKIES)
  File "/usr/local/lib/python3.6/dist-packages/selenium/webdriver/remote/webdriver.py", line 321, in execute
    self.error_handler.check_response(response)
  File "/usr/local/lib/python3.6/dist-packages/selenium/webdriver/remote/errorhandler.py", line 242, in check_response
    raise exception_class(message, screen, stacktrace)
selenium.common.exceptions.WebDriverException: Message: chrome not reachable
  (Session info: headless chrome=71.0.3578.80)
  (Driver info: chromedriver=2.44.609551 (5d576e9a44fe4c5b6a07e568f1ebc753f1214634),platform=Linux 4.15.0-42-generic x86_64)

知道原因可能是什么以及如何解决？

Answer 1

虽然您看到的错误为：

Error occurred while deleting cookies from web browser!
b'Message: invalid session id\n  (Driver info: chromedriver=2.44.609551 (5d576e9a44fe4c5b6a07e568f1ebc753f1214634),platform=Linux 4.15.0-42-generic x86_64)\n'

主要的例外是：

selenium.common.exceptions.WebDriverException: Message: unknown error: session deleted because of page crash
from unknown error: cannot determine loading status
from tab crashed

您的代码试用会为我们提供一些出了什么问题的线索。

解

有多种解决此问题的方法。但是，按照UnknownError：由于标签页崩溃导致会话删除，会话可以通过以下解决方案之一解决：

• 添加以下内容chrome_options：

  chrome_options.add_argument('--no-sandbox')
  

• 由于太小，Chrome似乎在某些页面的Docker容器中崩溃/dev/shm。因此，您可能必须修复较小的/dev/shm尺寸。

• 一个例子：

  sudo mount -t tmpfs -o rw,nosuid,nodev,noexec,relatime,size=512M tmpfs /dev/shm
  

• 如果您使用-v /dev/shm:/dev/shm选项共享 主机， 它也可以工作 __/dev/shm

• 使它起作用的另一种方法是将chrome_optionsas 添加 --disable-dev-shm-usage 。这将迫使Chrome使用该/tmp目录。尽管这会减慢执行速度，因为将使用磁盘而不是内存。

  chrome_options.add_argument('--disable-dev-shm-usage')
  

从标签页崩溃

从标签崩溃的 是 Chromium团队 进行WIP（ 工作进行中 ）了相当长时间了，这与 Linux试图始终使用/ dev /
shm作为不可执行内存有关
。以下是参考资料：

• Linux：Chrome / Chromium SIGBUS / Aw，Snap！在小型/ dev / shm上
• 当/ dev / shm太小且无法覆盖位置时，Chrome崩溃/无法加载
• 根据Comment61＃Issue 736452，此修复程序似乎已随 Chrome v65.0.3299.6 一起 发布