title: Selenium Webdrive socket.error
body: <p>I using Ubuntu x64</p>
  
  <p>When I execute fallowing code:</p>
  
  <pre><code>from selenium import webdriver
  x = webdriver.Firefox()
  x.get('any address')
  </code></pre>
  
  <p>I get the fallowing error:</p>
  
  <pre><code> % python seleniumtest.py 
  Traceback (most recent call last):
    File "seleniumtest.py", line 2, in &lt;module&gt;
      x = webdriver.Firefox()
    File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/firefox/webdriver.py", line 85, in __init__
      keep_alive=True)
    File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/remote/webdriver.py", line 90, in __init__
      self.start_session(desired_capabilities, browser_profile)
    File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/remote/webdriver.py", line 177, in start_session
      response = self.execute(Command.NEW_SESSION, capabilities)
    File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/remote/webdriver.py", line 234, 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 401, 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 432, in _request
      resp = self._conn.getresponse()
    File "/usr/lib/python2.7/httplib.py", line 1051, in getresponse
      response.begin()
    File "/usr/lib/python2.7/httplib.py", line 415, in begin
      version, status, reason = self._read_status()
    File "/usr/lib/python2.7/httplib.py", line 371, in _read_status
      line = self.fp.readline(_MAXLINE + 1)
    File "/usr/lib/python2.7/socket.py", line 476, in readline
      data = self._sock.recv(self._rbufsize)
  socket.error: [Errno 104] Connection reset by peer
  </code></pre>
  
  <p>What is this problem? how to can I fix this?</p>
  
  <hr>
  
  <p><strong>This problem I resolved</strong> executing fallowing command in terminal:</p>
  
  <p>terminal 1: <code>% sudo Xvfb :10 -ac</code>
  terminal 2: <code>$ export DISPLAY=:10</code></p>
  
  <p>Executing fallowing code:</p>
  
  <pre><code>from selenium import webdriver
  from selenium.webdriver.common.keys import Keys
  
  driver = webdriver.Firefox()
  driver.get("http://www.python.org")
  assert "Python" in driver.title
  elem = driver.find_element_by_name("q")
  elem.clear()
  elem.send_keys("pycon")
  elem.send_keys(Keys.RETURN)
  assert "No results found." not in driver.page_source
  driver.close()
  </code></pre>
  
  <p>Is returning this error:</p>
  
  <pre><code> % python seleniumtest.py
  Traceback (most recent call last):
    File "seleniumtest.py", line 4, in &lt;module&gt;
      driver = webdriver.Firefox()
    File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/firefox/webdriver.py", line 81, in __init__
      self.binary, timeout)
    File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/firefox/extension_connection.py", line 51, in __init__
      self.binary.launch_browser(self.profile, timeout=timeout)
    File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/firefox/firefox_binary.py", line 68, in launch_browser
      self._wait_until_connectable(timeout=timeout)
    File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/firefox/firefox_binary.py", line 98, in _wait_until_connectable
      raise WebDriverException("The browser appears to have exited "
  selenium.common.exceptions.WebDriverException: Message: The browser appears to have exited before we could connect. If you specified a log_file in the FirefoxBinary constructor, check it for details.
  </code></pre>
  
  <hr>
  
  <p>My <code>Firefox</code> and <code>Selenium</code> version:</p>
  
  <pre><code>% firefox -v
  Mozilla Firefox 47.0
  
   % pip show selenium
  ---
  Metadata-Version: 2.0
  Name: selenium
  Version: 2.53.5
  Summary: Python bindings for Selenium
  Home-page: https://github.com/SeleniumHQ/selenium/
  Author: UNKNOWN
  Author-email: UNKNOWN
  Installer: pip
  License: UNKNOWN
  Location: /usr/local/lib/python2.7/dist-packages
  Requires: 
  Classifiers:
    Development Status :: 5 - Production/Stable
    Intended Audience :: Developers
    License :: OSI Approved :: Apache Software License
    Operating System :: POSIX
    Operating System :: Microsoft :: Windows
    Operating System :: MacOS :: MacOS X
    Topic :: Software Development :: Testing
    Topic :: Software Development :: Libraries
    Programming Language :: Python
    Programming Language :: Python :: 2.6
    Programming Language :: Python :: 2.7
    Programming Language :: Python :: 3.2
    Programming Language :: Python :: 3.3
    Programming Language :: Python :: 3.4
  </code></pre>