Selenium (Python) WebDriverException with Chrome browser on Ubuntu

[ming]

Hi,
i've a bunch of Python Selenium scripts which have been running fine for years with Firefox.  However, when i replaced Firefox with Chrome this morning, i ran into the following exception
   ...
   WebDriverException: Message: Can not connect to the Service /opt/google/chrome/google-chrome
from a trivial Selenium script on Ubuntu.  The Chrome browser did come up but then the exception was thrown.

It's not clear to me what went awry though:

[code snippet]
   ...
   driver = webdriver.Chrome(executable_path="/opt/google/chrome/google-chrome")
   ...

The output of "file /opt/google/chrome/google-chrome" is:

   /opt/google/chrome/google-chrome: ELF 64-bit LSB shared object, x86-64,
   version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2,
   for GNU/Linux 2.6.26, BuildID[sha1]=6b766636ccc2748536dbd66ecc3ab46dd7957068, stripped

The pertinent versions are:
* Ubuntu    15.10
* Python    2.7.10
* Selenium  2.53.1
* Chrome    Version 49.0.2623.110 unknown (64-bit) 

Any idea at a quick glance?

Thanks for reading.

[Krishnan mahadevan]

Have you made the chromedriver available in your PATH variable ?

-Krishnan Mahadevan

"All the desirable things in life are either illegal, expensive, fattening or in love with someone else"

---

From: ming
Sent: ‎08-‎04-‎2016 19:56
To: Selenium Users
Subject: [selenium-users] Selenium (Python) WebDriverException with Chromebrowser on Ubuntu

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[Hseu-Ming Chen]

> Have you made the chromedriver available in your PATH variable ?

Yes, i did but to no avail:
   sys.path.append("/opt/google/chrome")

Moreover, in /usr/bin, i also established symlinks for
    chrome
    google-chrome
(from /opt/google/chrome) but that does not help either

The output of "ls /opt/google/chrome" appears to be correct:

chrome                           default-app-block         nacl_helper            product_logo_22.png   resources.pak
chrome_100_percent.pak           default_apps              nacl_helper_bootstrap  product_logo_24.png   snapshot_blob.bin
chrome_200_percent.pak           google-chrome             nacl_irt_x86_64.nexe   product_logo_256.png  xdg-mime
chrome_material_100_percent.pak  icudtl.dat                natives_blob.bin       product_logo_32.png   xdg-settings
chrome_material_200_percent.pak  libwidevinecdmadapter.so  PepperFlash            product_logo_32.xpm
chrome-sandbox                   libwidevinecdm.so         product_logo_128.png   product_logo_48.png
cron                             locales                   product_logo_16.png    product_logo_64.png

Thanks.

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[Krishnan mahadevan]

Am not talking about the browser binary. I am referring to the chromedriver binary that is additional required apart from the browser binary. Just thought I would be explicit about that.

Firefox doesn't need anything apart from the browser binary.

Chrome requires an additional server binary

-Krishnan Mahadevan

"All the desirable things in life are either illegal, expensive, fattening or in love with someone else"

---

From: Hseu-Ming Chen
Sent: ‎08-‎04-‎2016 20:27
To: seleniu...@googlegroups.com
Subject: Re: [selenium-users] Selenium (Python) WebDriverException withChromebrowser on Ubuntu

To view this discussion on the web visit https://groups.google.com/d/msgid/selenium-users/CALZG5Z0k8AdrwpBGWFgbjAvncPu_K5R4%3DbEVHawG8Ts-2VT8TQ%40mail.gmail.com.

[Hseu-Ming Chen]

> I am referring to the chromedriver binary that is additional required apart from the browser binary.

Thanks for pointing that out.   i just kind of rushed to simply replace FF with Chrome ...  my bad.

However, i now ran into a different exception ("Chrome failed to start: crashed") after i downloaded ChromeDriver 2.21 from https://sites.google.com/a/chromium.org/chromedriver/ and put it in /usr/bin

[code snippet]
    ...

    driver = webdriver.Chrome(executable_path='/usr/bin/chromedriver')

The output of "file /usr/bin/chromedriver" is:
    /usr/bin/chromedriver: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked,

    interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 2.6.26,

    BuildID[sha1]=86747d6354b01d908c3bda349727e74a9da3eb13, stripped

[program output]
Traceback (most recent call last):
  File "./t.py", line 9, in <module>
    driver = webdriver.Chrome(executable_path='/usr/bin/chromedriver')  # Optional argument, if not specified will search path.
  File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/chrome/webdriver.py", line 67, in __init__
    desired_capabilities=desired_capabilities)
  File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/remote/webdriver.py", line 91, in __init__
    self.start_session(desired_capabilities, browser_profile)
  File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/remote/webdriver.py", line 173, in start_session
    'desiredCapabilities': desired_capabilities,
  File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/remote/webdriver.py", line 233, in execute
    self.error_handler.check_response(response)
  File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/remote/errorhandler.py", line 194, in check_response
    raise exception_class(message, screen, stacktrace)
selenium.common.exceptions.WebDriverException: Message: unknown error: Chrome failed to start: crashed
  (Driver info: chromedriver=2.21.371461 (633e689b520b25f3e264a2ede6b74ccc23cb636a),platform=Linux 4.2.0-35-generic x86_64)

Is this due to some kind of incompatibility?    If so, is there a compatibility matrix somewhere that i can reference?

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[Krishnan mahadevan]

For chrome there is no such matrix that I am aware of.

Usually it's always the latest version of both the browser and the driver that does the trick.

Since I haven't worked with a Linux machine I am out of ideas on what could be causing the browser crash.

-Krishnan Mahadevan

"All the desirable things in life are either illegal, expensive, fattening or in love with someone else"

---

From: Hseu-Ming Chen
Sent: ‎08-‎04-‎2016 21:35

To view this discussion on the web visit https://groups.google.com/d/msgid/selenium-users/CALZG5Z2jOBENH_%3DvD2hRFwt95KuQq9EtOyi7%3D0LSVQYmJYQ-MA%40mail.gmail.com.

[Hseu-Ming Chen]

> Usually it's always the latest version of both the browser and the driver that does the trick.

While troubleshooting the problem this morning, i already upgraded my Chrome to the latest.   i later downloaded the __latest__ ChromeDriver from Google (for Linux 64-bit that is).

Anyway, thanks a lot for your input.

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