ConnectionResetError: [WinError 10054] 现有连接被 ChromeDriver Chrome Selenium Django 的远程主机错误强行关闭

Question

我正在通过“Obey the testing goat book”学习 TDD，但我正在尝试使用 Django 3 来学习。

如果有人知道，我在第 6 章。

我的代码是：

class VisitorTest(LiveServerTestCase):

    def setUp(self):
        self.browser = webdriver.Chrome()
        self.browser.implicitly_wait(2)

    def tearDown(self):
        self.browser.quit()

    def test_starting(self):
        print(self.live_server_url) 

        self.browser.get(self.live_server_url)

在控制台中我得到了

Creating test database for alias 'default'...
System check identified no issues (0 silenced).

DevTools listening on ws://127.0.0.1:52187/devtools/browser/e9a03a04-819e-40a3-a0e4-bd4133d8f6cb
http://localhost:52180
----------------------------------------
Exception happened during processing of request from ('127.0.0.1', 52204)
----------------------------------------
----------------------------------------
Exception happened during processing of request from ('127.0.0.1', 52202)
Exception happened during processing of request from ('127.0.0.1', 52203)
Traceback (most recent call last):
Traceback (most recent call last):
  File "C:\Users\Alex\AppData\Local\Programs\Python\Python36\lib\socketserver.py", line 654, in process_request_thread
    self.finish_request(request, client_address)
  File "C:\Users\Alex\AppData\Local\Programs\Python\Python36\lib\socketserver.py", line 654, in process_request_thread
    self.finish_request(request, client_address)
Traceback (most recent call last):
  File "C:\Users\Alex\AppData\Local\Programs\Python\Python36\lib\socketserver.py", line 364, in finish_request
    self.RequestHandlerClass(request, client_address, self)
  File "C:\Users\Alex\AppData\Local\Programs\Python\Python36\lib\socketserver.py", line 364, in finish_request
    self.RequestHandlerClass(request, client_address, self)
  File "C:\Users\Alex\AppData\Local\Programs\Python\Python36\lib\socketserver.py", line 724, in __init__
    self.handle()
  File "C:\Users\Alex\AppData\Local\Programs\Python\Python36\lib\socketserver.py", line 724, in __init__
    self.handle()
  File "C:\Users\Alex\PycharmProjects\goat\lib\site-packages\django\core\servers\basehttp.py", line 172, in handle
    self.handle_one_request()
  File "C:\Users\Alex\PycharmProjects\goat\lib\site-packages\django\core\servers\basehttp.py", line 172, in handle
    self.handle_one_request()
  File "C:\Users\Alex\PycharmProjects\goat\lib\site-packages\django\core\servers\basehttp.py", line 182, in handle_one_request
    self.raw_requestline = self.rfile.readline(65537)
  File "C:\Users\Alex\PycharmProjects\goat\lib\site-packages\django\core\servers\basehttp.py", line 182, in handle_one_request
    self.raw_requestline = self.rfile.readline(65537)
  File "C:\Users\Alex\AppData\Local\Programs\Python\Python36\lib\socket.py", line 586, in readinto
    return self._sock.recv_into(b)
  File "C:\Users\Alex\AppData\Local\Programs\Python\Python36\lib\socket.py", line 586, in readinto
    return self._sock.recv_into(b)
ConnectionResetError: [WinError 10054] An existing connection was forcibly closed by the remote host
ConnectionResetError: [WinError 10054] An existing connection was forcibly closed by the remote host
----------------------------------------
----------------------------------------
  File "C:\Users\Alex\AppData\Local\Programs\Python\Python36\lib\socketserver.py", line 654, in process_request_thread
    self.finish_request(request, client_address)
  File "C:\Users\Alex\AppData\Local\Programs\Python\Python36\lib\socketserver.py", line 364, in finish_request
    self.RequestHandlerClass(request, client_address, self)
  File "C:\Users\Alex\AppData\Local\Programs\Python\Python36\lib\socketserver.py", line 724, in __init__
    self.handle()
  File "C:\Users\Alex\PycharmProjects\goat\lib\site-packages\django\core\servers\basehttp.py", line 174, in handle
    self.handle_one_request()
  File "C:\Users\Alex\PycharmProjects\goat\lib\site-packages\django\core\servers\basehttp.py", line 182, in handle_one_request
    self.raw_requestline = self.rfile.readline(65537)
  File "C:\Users\Alex\AppData\Local\Programs\Python\Python36\lib\socket.py", line 586, in readinto
    return self._sock.recv_into(b)
ConnectionResetError: [WinError 10054] An existing connection was forcibly closed by the remote host
----------------------------------------
.
----------------------------------------------------------------------
Ran 1 test in 8.779s

OK
Destroying test database for alias 'default'...

但是测试运行良好（我没有在这里展示它们）。

我进行了研究，但没有发现任何结论

知道为什么要显示这些以及如何修复它们吗？

Answer 1

我尝试了不同的建议解决方案，但均未成功：

• changing test server address 从“本地主机”到“127.0.0.1”
• 更新旧的 ChromeDriver，因为 Anaconda 的 ChromeDriver 2.38 未正式支持我的 Chrome 83
• 在调用quit() 之前添加self.browser.refresh()（作为书本身suggest）
• 使用Edge浏览器（嗯……IE驱动没有这个问题，我也没试过FF）

如果我们深入研究，这种错误由LiveServerTestCase.server_thread.httpd.handle_error 函数处理，socketserver.BaseServer 中的默认实现只是将错误消息打印到stderr。由于这些消息是无害的，我决定将它们隐藏起来。

import sys
from contextlib import contextmanager

@contextmanager
def suppress_stderr():
    "Temporarly suppress writes to stderr"
    class Null:
        write = lambda *args: None
    err, sys.stderr = sys.stderr, Null
    try:
        yield
    finally:
        sys.stderr = err

# Suppress stderr messages during quit process
with suppress_stderr():
    self.browser.quit()

Answer 2

此错误消息...

ConnectionResetError: [WinError 10054] An existing connection was forcibly closed by the remote host

...暗示 ChromeDriver 和 Browsing Context 之间的连接，即 Chrome 浏览器 会话间歇性关闭。

当您使用的二进制文件版本之间不兼容时，会出现此问题。

---

解决方案

确保：

• Selenium 升级到当前级别 Version 3.141.59。
• ChromeDriver 已更新到当前的ChromeDriver v79.0.3945.36 级别。
• Chrome 已更新至当前 Chrome 版本 79.0 级别。 （根据ChromeDriver v79.0 release notes）
• 清理你的项目工作区通过你的IDE和重建你的项目只需要依赖。
• （仅限 Windows 操作系统）使用 CCleaner 工具在执行您的测试套件之前和之后清除所有操作系统琐事。
• （仅限 LinuxOS）Free Up and Release the Unused/Cached Memory in Ubuntu/Linux Mint 在执行您的测试套件之前和之后。
• 如果您的基本 Web 客户端 版本太旧，请卸载它并安装最新的 GA 和发布版本的 Web 客户端。
• 进行系统重启。
• 以非root用户身份执行@Test。
• 始终在 tearDown(){} 方法中调用 driver.quit() 以优雅地关闭和销毁 WebDriver 和 Web Client 实例。

---

参考

您可以在以下位置找到一些相关讨论：

• urllib3.exceptions.ProtocolError: ('Connection aborted.', error(10054, 'An existing connection was forcibly closed by the remote host'))

Answer 3

如果你正在使用 run_subprocess() 设置 detach_mode=True 并尝试一下