AttributeError: 'module' object has no attribute 'poll'

[nuklea]

After upgrade to 18.0 I've get this error every request. I use gevent-worker and preload_app.

ERROR Error handling request
Traceback (most recent call last):
  File "/home/nuklea/.virtualenvs/project/lib/python2.7/site-packages/gunicorn/workers/async.py", line 45, in handle
    self.handle_request(listener, req, client, addr)
  File "/home/nuklea/.virtualenvs/project/lib/python2.7/site-packages/gunicorn/workers/ggevent.py", line 151, in handle_request
    super(GeventWorker, self).handle_request(*args)
  File "/home/nuklea/.virtualenvs/project/lib/python2.7/site-packages/gunicorn/workers/async.py", line 93, in handle_request
    respiter = self.wsgi(environ, resp.start_response)
  File "/home/nuklea/.virtualenvs/project/lib/python2.7/site-packages/django/core/handlers/wsgi.py", line 236, in __call__
    self.load_middleware()
  File "/home/nuklea/.virtualenvs/project/lib/python2.7/site-packages/django/core/handlers/base.py", line 59, in load_middleware
    mw_instance = mw_class()
  File "/home/nuklea/.virtualenvs/project/lib/python2.7/site-packages/django_hosts/middleware.py", line 17, in __init__
    self.host_patterns = get_host_patterns()
  File "/home/nuklea/.virtualenvs/project/lib/python2.7/site-packages/django/utils/functional.py", line 31, in wrapper
    result = func(*args)
  File "/home/nuklea/.virtualenvs/project/lib/python2.7/site-packages/django_hosts/reverse.py", line 45, in get_host_patterns
    module = get_hostconf_module(hostconf)
  File "/home/nuklea/.virtualenvs/project/lib/python2.7/site-packages/django/utils/functional.py", line 31, in wrapper
    result = func(*args)
  File "/home/nuklea/.virtualenvs/project/lib/python2.7/site-packages/django_hosts/reverse.py", line 31, in get_hostconf_module
    return import_module(hostconf)
  File "/home/nuklea/.virtualenvs/project/lib/python2.7/site-packages/django/utils/importlib.py", line 35, in import_module
    __import__(name)
  File "/home/nuklea/workspace/project/project/hosts.py", line 25, in <module>
    ip_domains = get_servers()
  File "/home/nuklea/workspace/project/project/utils/hosts.py", line 16, in get_servers
    fab_module = load_source('fab_module', join(settings.PROJECT_ROOT + '/fabfile.py'))
  File "/home/nuklea/workspace/project/fabfile.py", line 34, in <module>
    from fabric.api import *
  File "/home/nuklea/.virtualenvs/project/lib/python2.7/site-packages/fabric/api.py", line 9, in <module>
    from fabric.context_managers import (cd, hide, settings, show, path, prefix,
  File "/home/nuklea/.virtualenvs/project/lib/python2.7/site-packages/fabric/context_managers.py", line 42, in <module>
    from fabric.state import output, win32, connections, env
  File "/home/nuklea/.virtualenvs/project/lib/python2.7/site-packages/fabric/state.py", line 10, in <module>
    from fabric.version import get_version
  File "/home/nuklea/.virtualenvs/project/lib/python2.7/site-packages/fabric/version.py", line 105, in <module>
    __version__ = get_version('short')
  File "/home/nuklea/.virtualenvs/project/lib/python2.7/site-packages/fabric/version.py", line 56, in get_version
    sha = git_sha()
  File "/home/nuklea/.virtualenvs/project/lib/python2.7/site-packages/fabric/version.py", line 24, in git_sha
    return p.communicate()[0]
  File "/usr/lib64/python2.7/subprocess.py", line 806, in communicate
    return self._communicate(input)
  File "/usr/lib64/python2.7/subprocess.py", line 1382, in _communicate
    stdout, stderr = self._communicate_with_poll(input)
  File "/usr/lib64/python2.7/subprocess.py", line 1412, in _communicate_with_poll
    poller = select.poll()
AttributeError: 'module' object has no attribute 'poll'

[nuklea]

Please, delete this issue.

[jjsoa1]

I've come across a similar issue. How was this resolved?

[ibeex]

Same issue here. How was this resolved?

[jbranc]

same here...
update:
fwiw, this is most likely indicitive of a circular import somewhere in the code. in my case, Haystack was causing it. This most likely has nothing to do with gunicorn.

[benoitc]

not related to gunicorn

[adamhaney]

@jbranc how did you track down the source of the circular import? I'm using gunicorn and I get this error in django template rendering as a part of django-pipeline, no stack trace just poof poll is gone.

[t-io]

@adamhaney same here. Was you able to resolve this?

[tilgovi]

@adamhaney @t-io you can try importing your application outside of gunicorn or running it with another server and see if you have any issues.

[benoitc]

using check-config may also return the error.

[xiaolin]

Seems to be a very specific issue with worker_class = 'gevent' and django pipeline package. My fix was to comment out worker_class = 'gevent' in /etc/gunicorn.d/gunicorn.py.