I am using a very complex setup to test various non-public webpages. I use jenkins to run the python-selenium tests within a dockerimage. That way, I am completly independent of the jenkins environment and can create my own environment. In this environment I have the following software installed:
The selenium tests create the WebDriver the following way:
profile = webdriver.FirefoxProfile()
profile.set_preference("browser.download.dir", self.downloadpath)
profile.set_preference("browser.download.folderList", 2)
profile.set_preference("browser.download.useDownloadDir", True)
profile.set_preference("browser.download.manager.showWhenStarting", False)
profile.set_preference("pdfjs.disabled", True)
profile.set_preference("browser.helperApps.neverAsk.saveToDisk",
"application/force-download, image/png, text/html, text/plain, "
"image/tiff, text/csv, application/zip, application/octet-stream")
profile.set_preference("browser.download.manager.alertOnEXEOpen", False)
profile.set_preference("browser.download.manager.focusWhenStarting", False)
profile.set_preference("browser.helperApps.alwaysAsk.force", False)
profile.set_preference("browser.download.manager.alertOnEXEOpen", False)
profile.set_preference("browser.download.manager.closeWhenDone", True)
profile.set_preference("browser.download.manager.showAlertOnComplete", False)
profile.set_preference("browser.download.manager.useWindow", False)
profile.set_preference("services.sync.prefs.sync.browser.download.manager.showWhenStarting",
False)
self.driver = webdriver.Firefox(profile, log_path = logfile)
where logfile and self.downloadpath are two valid paths in the docker setup.
The whole test suite consists of 6 independant test cases, each with the same setup as above. They normally run fine and complete without problems.
But without any change to the tests or the general setup, a test sometimes fails with the following error message:
File "/root/tests/bsp_usecase_tests/tools/basicsuite.py", line 210, in set_driver_firefox
self.driver = webdriver.Firefox(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 311, in execute
self.error_handler.check_response(response)
File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/remote/errorhandler.py", line 237, in check_response
raise exception_class(message, screen, stacktrace)
WebDriverException: Message: connection refused
I have two questions:
Addendum:
time.sleep(10) just before the webdriver.Firefox line, the error did not show up anymore. Shoud I put that line in a while-try-except loop?The error you are seeing is :
WebDriverException: Message: connection refused
As per the documentation WebDriverException is the Base webdriver exception which is as follows :
exception selenium.common.exceptions.WebDriverException(msg=None, screen=None, stacktrace=None)
So connection is refused here means that Selenium is unable to establish the connecting which you wanted to establish through :
self.driver = webdriver.Firefox(profile, log_path = logfile)
A possible solution would be to provide the complete name of the logfile along with the logical location of the logfile (from Project Level) as follows :
self.driver = webdriver.Firefox(firefox_profile=profile, log_path='./Log/geckodriver.log')
Here you can find a similar Discussion
Again, as you mentioned When I used a time.sleep(10) just before the webdriver.Firefox line, the error did not show up anymore, so I assume there was an instance of GeckoDriver and Firefox Browser client active previously. Hence, similarly as @Florent B. mentioned you have to shield your script against facing Race Around Condition which can stem out from either of the following :
GeckoDriver or Marionette by the new session which previous session have't released yet.Docker Image ran out of memoryHere you can find a similar Discussion.
As per the above mentioned causes, you need to follow a few steps as follows :
Selenium-Python client, WebDriver variant (GeckoDriver) and Web Browser (Firefox Browser)tearDown() method so that the webdriver and the webclient both are properly destroyed.Clean the Project Workspace from your IDE before and after executing your Test Suite.Clear the Browser Cache before and after the execution of your TestsCCleaner tool regularly to wipe away the OS chores including the stale rust_mozprofile directories.