OperationalError: no connection to the server using Django and gunicorn

[Adrián Ribao]

Hello,

I'm testing gunicorn in the server, and I get this error in every
request:

Traceback (most recent call last):
File "project/env/lib/python2.6/site-packages/gunicorn/workers/
async.py", line 62, in handle_request
respiter = self.wsgi(environ, resp.start_response)
File "project/env/lib/python2.6/site-packages/django/contrib/
staticfiles/handlers.py", line 68, in __call__
return self.application(environ, start_response)
File "project/env/lib/python2.6/site-packages/django/core/handlers/
wsgi.py", line 273, in __call__
response = self.get_response(request)
File "project/env/lib/python2.6/site-packages/django/core/handlers/
base.py", line 168, in get_response
receivers =
signals.got_request_exception.send(sender=self.__class__,
request=request)
File "project/env/lib/python2.6/site-packages/django/dispatch/
dispatcher.py", line 172, in send
response = receiver(signal=self, sender=sender, **named)
File "project/env/lib/python2.6/site-packages/django/db/
__init__.py", line 101, in _rollback_on_exception
transaction.rollback_unless_managed(using=conn)
File "project/env/lib/python2.6/site-packages/django/db/
transaction.py", line 133, in rollback_unless_managed
connection.rollback_unless_managed()
File "project/env/lib/python2.6/site-packages/django/db/backends/
__init__.py", line 193, in rollback_unless_managed
self._rollback()
File "project/env/lib/python2.6/site-packages/django/db/backends/
__init__.py", line 50, in _rollback
return self.connection.rollback()

Is working ok with mod_wsgi.

I'm using Debian 6.0 with Django 1.3, postgis for geodjango, the
latest stable version of gunicorn 0.12.1 and gevent. I've been trying
with a sync worker but I got the same error.

I have no idea what's wrong.

Any ideas?

Thank you!

Adrian

[Shawn Milochik]

What's the command you're using to run it?

Are you in screen? Are you using supervisor or anything like that?

[Adrián Ribao]

I'm doing it manually because I'm just testing:

./manage.py run_gunicorn -c gunicorn.conf.py

where gunicorn.conf.py

# -*- coding: utf-8 -*-
import multiprocessing

bind = "127.0.0.1:8000"
workers = multiprocessing.cpu_count() * 2 + 1
worker_class = 'gevent'

[Андрей Махнач]

Hi Adrian,

Have you solved this weird issue?

if yes, please tell me how.

Best regards,
Andrey Makhnach

[Adrián Ribao Martínez]

I think that the error comes only when starting the server.

Reload the page about 10 times and check if you still get the error.

Regards,

Adrián

[Андрей Махнач]

I'm getting this error randomly
and it throws 500error to nginx (I'm using nginx+gunicorn)

and it appears really randomly ;)

[Adrian Ribao]

I still have the same problem using gevent with gunicorn, but it works with synchronous workers.

Did you find a solution?

2011/7/1 Андрей Махнач <andrey....@gmail.com>

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