IndexError: list index out of range

[camilonova]

I'm trying to run the demo browsing the locust docs and I'm getting this error:

[2014-06-19 16:43:47,263] axc.local/ERROR/stderr: Traceback (most recent call last):
  File ".../lib/python2.7/site-packages/locust/core.py", line 267, in run
    self.execute_next_task()
  File ".../lib/python2.7/site-packages/locust/core.py", line 293, in execute_next_task
    self.execute_task(task["callable"], *task["args"], **task["kwargs"])
  File ".../lib/python2.7/site-packages/locust/core.py", line 305, in execute_task
    task(self, *args, **kwargs)
  File ".../locustfile.py", line 33, in load_sub_page
    url = random.choice(self.urls_on_current_page)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/random.py", line 274, in choice
    return seq[int(self.random() * len(seq))]  # raises IndexError if seq is empty
IndexError: list index out of range

and at the end I get this error report:

GET /en/latest//: 'ConnectionError(MaxRetryError("HTTPConnectionPool(host=\'docs.locust.io\', port=80): Max retries exceeded with url: /en/latest// (Caused by <class \'socket.gaierror\'>: [Errno 8] nodename nor servname provided, or not known)",),)'
GET /en/latest/writing-a-locustfile.html: 'ConnectionError(MaxRetryError("HTTPConnectionPool(host=\'docs.locust.io\', port=80): Max retries exceeded with url: /en/latest/writing-a-locustfile.html (Caused by <class \'socket.gaierror\'>: [Errno 8] nodename nor servname provided, or not known)",),)'

It keeps stuck after the first error doing nothing, if I redirect the url to a custom site and check the logs, as soon as the error gets in locusts stops making requests.

I'm using a usual virtualenv with python 2.7 and packages installed by pip.

Thanks.

[heyman]

Hmm, that's strange. Can you reach http://docs.locust.io from your browser?

[camilonova]

Yes I can, it works for the first pages and then starts to fail.

[Jahaja]

You seem to have DNS related problems, could you try this on another host or after changing your nameserver to, for example, googles 8.8.8.8?

[camilonova]

Still the same, can we test something else than DNS ?

[whgibbo]

I'm having the same issue, what was the solution ?
Forget I solved it, I was using on_start rather than defining tasks :( Sorry

[msert29]

I think you guys need to specify the on_start method and check that you have configured the task decorator before task methods.

[rohitkhatana]

Yup, I had the same issue. I was not decorating my task/method with @task. After decorating the method, I did not get the error :)

[renanbastos93]

I have the same problem, I using a macOS Mojave in a MacMini 2012

[vincent-haoy]

I got the same issue. I used 2 diff machines to send requests to the same server. One of the machines goes well but the other one keeps reporting this error. It is quite strange.