problem with select library

[cedriclecoz]

Hi all,

I'm trying to test the websocket mechanism of our server.

I have a python script, in stand alone, it establishes websockets connections, then a thread poll the websocket files descriptors to know when to receive.
when i try to integrate this script with locust, at runtime i get the following error :

phoenix/ERROR/stderr: Traceback (most recent call last):
phoenix/ERROR/stderr: File "/usr/local/bin/locust", line 9, in
phoenix/ERROR/stderr:
phoenix/ERROR/stderr: load_entry_point('locustio==0.7.2', 'console_scripts', 'locust')()
phoenix/ERROR/stderr: File "/usr/local/lib/python2.7/dist-packages/locustio-0.7.2-py2.7.egg/locust/main.py", line 349, in main
phoenix/ERROR/stderr:
phoenix/ERROR/stderr: docstring, locusts = load_locustfile(locustfile)
phoenix/ERROR/stderr: File "/usr/local/lib/python2.7/dist-packages/locustio-0.7.2-py2.7.egg/locust/main.py", line 321, in load_locustfile
phoenix/ERROR/stderr:
phoenix/ERROR/stderr: imported = import(os.path.splitext(locustfile)[0])
phoenix/ERROR/stderr: File "/home/cedricl/AVIRER/locustfile.py", line 28, in
phoenix/ERROR/stderr:
phoenix/ERROR/stderr: wsPoll = select.epoll()
phoenix/ERROR/stderr: AttributeError
phoenix/ERROR/stderr: :
phoenix/ERROR/stderr: 'module' object has no attribute 'epoll'

on a working script, if i just add a locust import, (for example: from locust import TaskSet)
it produce the trace.

on a working locust script (one of the example), adding the following 2 lines :
import select
wsPoll = select.epoll()

produce the problem.

Does anyone know how to use epoll or poll with locust ?

Thanks,
Cedric.

[cgoldberg]

do you have a local file/module named "select.py" that is shadowing the "select" module from the standard library?

[cedriclecoz]

Hi,

no i don't, my working script is in the same folder as the locustfile.py, and just for info, just adding a locust import (for example: from locust import TaskSet) at the top of my non-locust script make it crash.

I did go around my problem by using my script as a standalone, with a pair of sockets between it and locust to communicate.

Thanks,

[heyman]

I believe this might be due to gevent monkey patching select.

Just running the following also fails:

from gevent import monkey
monkey.patch_all()
import select
select.epoll

Locust runs gevent's monkey.patch_all() at the start.

[cedriclecoz]

Ok, i will continue with my separate process then.
Thanks,