带有psycopg2的Django 1.5抛出随机错误

Question

我面临一些奇怪的问题。当我为Django应用程序运行单个worker时？像这样：

python manage.py run_gunicorn -w 1

python manage.py runserver

所有请求均正确满足，但如果启动多个工作程序，例如：

python manage.py run_gunicorn -w 10

Django对（大约）我的请求的一半做出错误回应：

2013-06-13 18:02:39 [10205] [ERROR] Error handling request

Traceback (most recent call last):

  File "/home/mezhenin/venv/karma/local/lib/python2.7/site-packages/gunicorn/workers/sync.py", line 130, in handle_request

    for item in respiter:

  File "/home/mezhenin/venv/karma/local/lib/python2.7/site-packages/raven/middleware.py", line 27, in __call__

    iterable = self.application(environ, start_response)

  File "/home/mezhenin/venv/karma/local/lib/python2.7/site-packages/django/core/handlers/wsgi.py", line 255, in __call__

    response = self.get_response(request)

  File "/home/mezhenin/venv/karma/local/lib/python2.7/site-packages/django/core/handlers/base.py", line 177, in get_response

    signals.got_request_exception.send(sender=self.__class__, request=request)

  File "/home/mezhenin/venv/karma/local/lib/python2.7/site-packages/django/dispatch/dispatcher.py", line 170, in send

    response = receiver(signal=self, sender=sender, **named)

  File "/home/mezhenin/venv/karma/local/lib/python2.7/site-packages/django/db/__init__.py", line 68, in _rollback_on_exception

    transaction.rollback_unless_managed(using=conn)

  File "/home/mezhenin/venv/karma/local/lib/python2.7/site-packages/django/db/transaction.py", line 143, in rollback_unless_managed

    connection.rollback_unless_managed()

  File "/home/mezhenin/venv/karma/local/lib/python2.7/site-packages/django/db/backends/__init__.py", line 232, in rollback_unless_managed

    self._rollback()

  File "/home/mezhenin/venv/karma/local/lib/python2.7/site-packages/django/db/backends/__init__.py", line 59, in _rollback

    return self.connection.rollback()

OperationalError: no connection to the server

我尝试将sqlite3用作Django的数据库后端，并且工作正常。有人对psycopg2有相同的问题吗？

Django==1.5

gunicorn==0.17.2

psycopg2==2.5