Question

我正在使用复杂的python-selenium测试套件来测试非公共网页。在那个设置中，我需要得到如下的webdriver：

self.driver = webdriver.Firefox(firefox_profile = profile, log_path = logfile)

有一些配置文件和日志路径。在大多数情况下，这行代码运行正常，但有时（5％或者情况）我得到套接字超时错误：

File "/root/tests/usecase_tests/tools/basicsuite.py", line 213, in set_driver_firefox
    self.driver = webdriver.Firefox(firefox_profile = profile, log_path = logfile)
  File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/firefox/webdriver.py", line 158, in __init__
    keep_alive=True)
  File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/remote/webdriver.py", line 154, in __init__
    self.start_session(desired_capabilities, browser_profile)
  File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/remote/webdriver.py", line 243, in start_session
    response = self.execute(Command.NEW_SESSION, parameters)
  File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/remote/webdriver.py", line 309, in execute
    response = self.command_executor.execute(driver_command, params)
  File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/remote/remote_connection.py", line 460, in execute
    return self._request(command_info[0], url, body=data)
  File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/remote/remote_connection.py", line 484, in _request
    resp = self._conn.getresponse()
  File "/usr/lib/python2.7/httplib.py", line 1136, in getresponse
    response.begin()
  File "/usr/lib/python2.7/httplib.py", line 453, in begin
    version, status, reason = self._read_status()
  File "/usr/lib/python2.7/httplib.py", line 409, in _read_status
    line = self.fp.readline(_MAXLINE + 1)
  File "/usr/lib/python2.7/socket.py", line 480, in readline
    data = self._sock.recv(self._rbufsize)
timeout: timed out

可能导致此错误的原因是什么？如何调试此错误？怎么解决？

Answer 1

错误说明了一切：

  File "/usr/lib/python2.7/socket.py", line 480, in readline
    data = self._sock.recv(self._rbufsize)
timeout: timed out

事件顺序

以下是发生的事件序列：

最初错误发生在basicsuite.py文件中的以下行：

self.driver = webdriver.Firefox(firefox_profile = profile, log_path = logfile)

经过一系列检查后，最终调用以下方法失败：

def readinto(self, b):
"""Read up to len(b) bytes into the writable buffer *b* and return
the number of bytes read.  If the socket is non-blocking and no bytes
are available, None is returned.

If *b* is non-empty, a 0 return value indicates that the connection
was shutdown at the other end.
"""
self._checkClosed()
self._checkReadable()
if self._timeout_occurred:
    raise OSError("cannot read from timed out object")
while True:
    try:
    return self._sock.recv_into(b)
    except timeout:
    self._timeout_occurred = True
    raise
    except error as e:
    if e.args[0] in _blocking_errnos:
        return None
    raise

程序错误发生在：

self._sock.recv(b) # where If *b* is non-empty, a 0 return value indicates that the connection was shutdown at the other end.

结论

结论是尝试使Connection无法成功，这意味着webdriver实例的初始化并进一步产生新的Mozilla Firefox浏览器会议没有成功。

分析

无法确定 timeout: timed out 发生的真正原因。但您可以按照以下方式遵循一些最佳实践：

提供日志文件的完整名称以及日志文件的 logical location （来自项目级别），如下所示：
```
self.driver = webdriver.Firefox(firefox_profile=profile, log_path='./Log/geckodriver.log')
```
始终在 tearDown（）方法中使用 quit() ，以便 webdriver 和 webclient 都被正确销毁。
在开始Test Execution之前，通过Task Manager确保 GeckoDriver 或<没有悬空实例您的系统中强> Firefox 处理。
确保您使用的二进制版本 JDK ， Selenium ， GeckoDriver ， Mozilla Firefox Browser 兼容。您可以在此质量检查Selenium WebDriver 3.4.0 + geckodriver 0.18.0 + Firefox ?? - which combination works?

Project Workspace

清除 IDE中的Test Suite。
定期使用 CCleaner 工具擦除关闭操作系统。
如果Firefox Browser的基本版本过于古老，请使用Firefox Browser通过 Revo Uninstaller 卸载Moderate Scan并安装最近版本GA-Released的{{1}}版本。

Answer 2

这在我的Django应用中发生了。当我在DEBUG = False文件中设置settings.py时，问题消失了。

如何避免selenium webdriver的套接字超时？

2 个答案:

事件顺序

结论

分析