I am trying to use selenium/phantomjs with scrapy and I'm riddled with errors. For example, take the following code snippet:
def parse(self, resposne):
while True:
try:
driver = webdriver.PhantomJS()
# do some stuff
driver.quit()
break
except (WebDriverException, TimeoutException):
try:
driver.quit()
except UnboundLocalError:
print "Driver failed to instantiate"
time.sleep(3)
continue
A lot of the times the driver it seems it has failed to instantiate (so the driver
is unbound, hence the exception), and I get the blurb (along with the print message I put in)
Exception AttributeError: "'Service' object has no attribute 'process'" in <bound method Service.__del__ of <selenium.webdriver.phantomjs.service.Service object at 0x7fbb28dc17d0>> ignored
Googling around, it seems everyone suggests updating phantomjs, which I have (1.9.8
built from source). Would anyone know what else could be causing this problem and a suitable diagnosis?
The reason for this behavior is how the PhantomJS driver's Service
class is implemented.
There is a __del__
method defined that calls self.stop()
method:
def __del__(self):
# subprocess.Popen doesn't send signal on __del__;
# we have to try to stop the launched process.
self.stop()
And, self.stop()
is assuming the service instance is still alive trying to access it's attributes:
def stop(self):
"""
Cleans up the process
"""
if self._log:
self._log.close()
self._log = None
#If its dead dont worry
if self.process is None:
return
...
The same exact problem is perfectly described in this thread:
What you should do is to silently ignore AttributeError
occurring while quitting the driver instance:
try:
driver.quit()
except AttributeError:
pass
The problem was introduced by this revision. Which means that downgrading to 2.40.0
would also help.
I had that problem because phantomjs was not available from script (was not in path). You can check it by running phantomjs in console.
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