python - Webdriver Exception:Process unexpectedly closed with status: 1

Question

I try to run a selenium program on a Linux machine.But I got the exceptions:

    Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python2.7/site-packages/selenium/webdriver/firefox/webdriver.py", line 154, in __init__
    keep_alive=True)
  File "/usr/lib/python2.7/site-packages/selenium/webdriver/remote/webdriver.py", line 151, in __init__
    self.start_session(desired_capabilities, browser_profile)
  File "/usr/lib/python2.7/site-packages/selenium/webdriver/remote/webdriver.py", line 240, in start_session
    response = self.execute(Command.NEW_SESSION, parameters)
     File "/usr/lib/python2.7/site-packages/selenium/webdriver/remote/webdriver.py", line 308, in execute
    self.error_handler.check_response(response)
  File "/usr/lib/python2.7/site-packages/selenium/webdriver/remote/errorhandler.py", line 194, in check_response
    raise exception_class(message, screen, stacktrace)
selenium.common.exceptions.WebDriverException: Message: Process unexpectedly closed with status: 1

How can I fix the exceptions? Thanks for helping.

Answer 1

This error can come up when you are trying to run the browser in non-headless mode on a box that doesn't have a display (like an Ubuntu server).

You can check if that's the cause of your Process unexpectedly closed with status: 1 error by looking at the geckodriver.log file that is usually left in your working directory after you run your script, it should have a line like:

Error: GDK_BACKEND does not match available displays

If you see that line in the geckodriver.log then you'll need to switch your script to run Firefox in headless mode:

from selenium import webdriver
from selenium.webdriver import FirefoxOptions

opts = FirefoxOptions()
opts.add_argument("--headless")
browser = webdriver.Firefox(firefox_options=opts)

browser.get('http://example.com')