title: RuntimeError: populate() isn't reentrant in Django
body: <p>I am trying to deploy django website.Project name is pom.
  I am trying to run django website in ec2 server using apache2 and getting the following error:</p>
  
  <p>Apache error file:</p>
  
  <pre><code>[Fri Jul 24 12:37:33.621285 2015] [:info] [pid 20446:tid 140024755709824] mod_wsgi (pid=20446): Attach interpreter ''.
  [Fri Jul 24 12:37:33.621462 2015] [:info] [pid 20446:tid 140024755709824] mod_wsgi (pid=20446): Adding '/home/ubuntu/.virtualenvs/edusamosa/lib/python2.7/site-packages/' to path.
  [Fri Jul 24 12:37:44.145762 2015] [authz_core:debug] [pid 20448:tid 140024656201472] mod_authz_core.c(802): [client 49.248.57.164:11934] AH01626: authorization result of Require all granted: granted
  [Fri Jul 24 12:37:44.145888 2015] [authz_core:debug] [pid 20448:tid 140024656201472] mod_authz_core.c(802): [client 49.248.57.164:11934] AH01626: authorization result of &lt;RequireAny&gt;: granted
  [Fri Jul 24 12:37:44.145947 2015] [authz_core:debug] [pid 20448:tid 140024656201472] mod_authz_core.c(802): [client 49.248.57.164:11934] AH01626: authorization result of Require all granted: granted
  [Fri Jul 24 12:37:44.145953 2015] [authz_core:debug] [pid 20448:tid 140024656201472] mod_authz_core.c(802): [client 49.248.57.164:11934] AH01626: authorization result of &lt;RequireAny&gt;: granted
  [Fri Jul 24 12:37:44.152795 2015] [:info] [pid 20446:tid 140024564070144] mod_wsgi (pid=20446): Create interpreter 'www.edusamosa.in|'.
  [Fri Jul 24 12:37:44.153592 2015] [:info] [pid 20446:tid 140024564070144] mod_wsgi (pid=20446): Adding '/home/ubuntu/.virtualenvs/edusamosa/lib/python2.7/site-packages/' to path.
  [Fri Jul 24 12:37:44.152795 2015] [:info] [pid 20446:tid 140024564070144] mod_wsgi (pid=20446): Create interpreter 'www.edusamosa.in|'.
  [Fri Jul 24 12:37:44.153592 2015] [:info] [pid 20446:tid 140024564070144] mod_wsgi (pid=20446): Adding '/home/ubuntu/.virtualenvs/edusamosa/lib/python2.7/site-packages/' to path.
  [Fri Jul 24 12:37:44.153884 2015] [:info] [pid 20446:tid 140024564070144] [remote 49.248.57.164:51213] mod_wsgi (pid=20446, process='pom', application='www.edusamosa.in|'): Loading WSGI script '/home/ubuntu/pom/pom/wsgi.py'.
  [Fri Jul 24 12:37:44.354165 2015] [:error] [pid 20446:tid 140024564070144] [remote 49.248.57.164:51213] mod_wsgi (pid=20446): Target WSGI script '/home/ubuntu/pom/pom/wsgi.py' cannot be loaded as Python module.
  [Fri Jul 24 12:37:44.354189 2015] [:error] [pid 20446:tid 140024564070144] [remote 49.248.57.164:51213] mod_wsgi (pid=20446): Exception occurred processing WSGI script '/home/ubuntu/pom/pom/wsgi.py'.
  [Fri Jul 24 12:37:44.354222 2015] [:error] [pid 20446:tid 140024564070144] [remote 49.248.57.164:51213] Traceback (most recent call last):
  [Fri Jul 24 12:37:44.354238 2015] [:error] [pid 20446:tid 140024564070144] [remote 49.248.57.164:51213]   File "/home/ubuntu/pom/pom/wsgi.py", line 19, in &lt;module&gt;
  [Fri Jul 24 12:37:44.354362 2015] [:error] [pid 20446:tid 140024564070144] [remote 49.248.57.164:51213]     application = get_wsgi_application()
  @                   [Fri Jul 24 12:37:44.354238 2015] [:error] [pid 20446:tid 140024564070144] [remote 49.248.57.164:51213]   File "/home/ubuntu/pom/pom/wsgi.py", line 19, in &lt;module&gt;
  [Fri Jul 24 12:37:44.354362 2015] [:error] [pid 20446:tid 140024564070144] [remote 49.248.57.164:51213]     application = get_wsgi_application()
  [Fri Jul 24 12:37:44.354377 2015] [:error] [pid 20446:tid 140024564070144] [remote 49.248.57.164:51213]   File "/usr/local/lib/python2.7/dist-packages/django/core/wsgi.py", line 14, in get_wsgi_application
  [Fri Jul 24 12:37:44.354416 2015] [:error] [pid 20446:tid 140024564070144] [remote 49.248.57.164:51213]     django.setup()
  [Fri Jul 24 12:37:44.354428 2015] [:error] [pid 20446:tid 140024564070144] [remote 49.248.57.164:51213]   File "/usr/local/lib/python2.7/dist-packages/django/__init__.py", line 18, in setup
  [Fri Jul 24 12:37:44.354465 2015] [:error] [pid 20446:tid 140024564070144] [remote 49.248.57.164:51213]     apps.populate(settings.INSTALLED_APPS)
  [Fri Jul 24 12:37:44.354476 2015] [:error] [pid 20446:tid 140024564070144] [remote 49.248.57.164:51213]   File "/usr/local/lib/python2.7/dist-packages/django/apps/registry.py", line 85, in populate
  [Fri Jul 24 12:37:44.354590 2015] [:error] [pid 20446:tid 140024564070144] [remote 49.248.57.164:51213]     app_config = AppConfig.create(entry)
  [Fri Jul 24 12:37:44.354602 2015] [:error] [pid 20446:tid 140024564070144] [remote 49.248.57.164:51213]   File "/usr/local/lib/python2.7/dist-packages/django/apps/config.py", line 86, in create
  [Fri Jul 24 12:37:44.354590 2015] [:error] [pid 20446:tid 140024564070144] [remote 49.248.57.164:51213]     app_config = AppConfig.create(entry)
  [Fri Jul 24 12:37:44.354602 2015] [:error] [pid 20446:tid 140024564070144] [remote 49.248.57.164:51213]   File "/usr/local/lib/python2.7/dist-packages/django/apps/config.py", line 86, in create
  [Fri Jul 24 12:37:44.354697 2015] [:error] [pid 20446:tid 140024564070144] [remote 49.248.57.164:51213]     module = import_module(entry)
  [Fri Jul 24 12:37:44.354708 2015] [:error] [pid 20446:tid 140024564070144] [remote 49.248.57.164:51213]   File "/usr/lib/python2.7/importlib/__init__.py", line 37, in import_module
  [Fri Jul 24 12:37:44.354765 2015] [:error] [pid 20446:tid 140024564070144] [remote 49.248.57.164:51213]     __import__(name)
  [Fri Jul 24 12:37:44.354793 2015] [:error] [pid 20446:tid 140024564070144] [remote 49.248.57.164:51213] ImportError: No module named allauth
  [Fri Jul 24 12:37:45.251341 2015] [authz_core:debug] [pid 20447:tid 140024656201472] mod_authz_core.c(802): [client 49.248.57.164:11938] AH01626: authorization result of Require all granted: granted, referer: http://edusamosa.in/
  [Fri Jul 24 12:37:45.251496 2015] [authz_core:debug] [pid 20447:tid 140024656201472] mod_authz_core.c(802): [client 49.248.57.164:11938] AH01626: authorization result of &lt;RequireAny&gt;: granted, referer: http://edusamosa.in/
  [Fri Jul 24 12:37:45.251559 2015] [authz_core:debug] [pid 20447:tid 140024656201472] mod_authz_core.c(802): [client 49.248.57.164:11938] AH01626: authorization result of Require all granted: granted, referer: http://edusamosa.in/
           [Fri Jul 24 12:37:45.251496 2015] [authz_core:debug] [pid 20447:tid 140024656201472] mod_authz_core.c(802): [client 49.248.57.164:11938] AH01626: authorization result of &lt;RequireAny&gt;: granted, referer: http://edusamosa.in/
  [Fri Jul 24 12:37:45.251559 2015] [authz_core:debug] [pid 20447:tid 140024656201472] mod_authz_core.c(802): [client 49.248.57.164:11938] AH01626: authorization result of Require all granted: granted, referer: http://edusamosa.in/
  [Fri Jul 24 12:37:45.251565 2015] [authz_core:debug] [pid 20447:tid 140024656201472] mod_authz_core.c(802): [client 49.248.57.164:11938] AH01626: authorization result of &lt;RequireAny&gt;: granted, referer: http://edusamosa.in/
  [Fri Jul 24 18:07:45.251722 2015] [:info] [pid 20446:tid 140024648070912] [remote 49.248.57.164:58879] mod_wsgi (pid=20446, process='pom', application='www.edusamosa.in|'): Loading WSGI script '/home/ubuntu/pom/pom/wsgi.py'.
  [Fri Jul 24 18:07:45.252817 2015] [:error] [pid 20446:tid 140024648070912] [remote 49.248.57.164:58879] mod_wsgi (pid=20446): Target WSGI script '/home/ubuntu/pom/pom/wsgi.py' cannot be loaded as Python module.
  [Fri Jul 24 18:07:45.252831 2015] [:error] [pid 20446:tid 140024648070912] [remote 49.248.57.164:58879] mod_wsgi (pid=20446): Exception occurred processing WSGI script '/home/ubuntu/pom/pom/wsgi.py'.
  [Fri Jul 24 18:07:45.252850 2015] [:error] [pid 20446:tid 140024648070912] [remote 49.248.57.164:58879] Traceback (most recent call last):
  [Fri Jul 24 18:07:45.252870 2015] [:error] [pid 20446:tid 140024648070912] [remote 49.248.57.164:58879]   File "/home/ubuntu/pom/pom/wsgi.py", line 19, in &lt;module&gt;
                  [Fri Jul 24 18:07:45.252850 2015] [:error] [pid 20446:tid 140024648070912] [remote 49.248.57.164:58879] Traceback (most recent call last):
  [Fri Jul 24 18:07:45.252870 2015] [:error] [pid 20446:tid 140024648070912] [remote 49.248.57.164:58879]   File "/home/ubuntu/pom/pom/wsgi.py", line 19, in &lt;module&gt;
  [Fri Jul 24 18:07:45.252913 2015] [:error] [pid 20446:tid 140024648070912] [remote 49.248.57.164:58879]     application = get_wsgi_application()
  [Fri Jul 24 18:07:45.252923 2015] [:error] [pid 20446:tid 140024648070912] [remote 49.248.57.164:58879]   File "/usr/local/lib/python2.7/dist-packages/django/core/wsgi.py", line 14, in get_wsgi_application
  [Fri Jul 24 18:07:45.252940 2015] [:error] [pid 20446:tid 140024648070912] [remote 49.248.57.164:58879]     django.setup()
  [Fri Jul 24 18:07:45.252948 2015] [:error] [pid 20446:tid 140024648070912] [remote 49.248.57.164:58879]   File "/usr/local/lib/python2.7/dist-packages/django/__init__.py", line 18, in setup
  [Fri Jul 24 18:07:45.252961 2015] [:error] [pid 20446:tid 140024648070912] [remote 49.248.57.164:58879]     apps.populate(settings.INSTALLED_APPS)
  [Fri Jul 24 18:07:45.252969 2015] [:error] [pid 20446:tid 140024648070912] [remote 49.248.57.164:58879]   File "/usr/local/lib/python2.7/dist-packages/django/apps/registry.py", line 78, in populate
  [Fri Jul 24 18:07:45.252981 2015] [:error] [pid 20446:tid 140024648070912] [remote 49.248.57.164:58879]     raise RuntimeError("populate() isn't reentrant")
  @                              
                                     @        [Fri Jul 24 18:07:45.252969 2015] [:error] [pid 20446:tid 140024648070912] [remote 49.248.57.164:58879]   File "/usr/local/lib/python2.7/dist-packages/django/apps/registry.py", line 78, in populate
  [Fri Jul 24 18:07:45.252981 2015] [:error] [pid 20446:tid 140024648070912] [remote 49.248.57.164:58879]     raise RuntimeError("populate() isn't reentrant")
  [Fri Jul 24 18:07:45.252996 2015] [:error] [pid 20446:tid 140024648070912] [remote 49.248.57.164:58879] RuntimeError: populate() isn't reentrant
  ~                                           
  </code></pre>
  
  <p>My pom.settings.py is as follow:</p>
  
  <pre><code>"""
  Django settings for pom project.
  
  Generated by 'django-admin startproject' using Django 1.8.2.
  
  For more information on this file, see
  https://docs.djangoproject.com/en/1.8/topics/settings/
  
  For the full list of settings and their values, see
  https://docs.djangoproject.com/en/1.8/ref/settings/
  """
  
  # Build paths inside the project like this: os.path.join(BASE_DIR, ...)
  import os
  
  BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
  
  
  # Quick-start development settings - unsuitable for production
  # See https://docs.djangoproject.com/en/1.8/howto/deployment/checklist/
  
  
  
  ALLOWED_HOSTS = ['*']
  
  
  # Application definition
  '''
  STATICFILES_FINDERS = (
      'django.contrib.staticfiles.finders.FileSystemFinder',
      'django.contrib.staticfiles.finders.AppDirectoriesFinder',
      # 'django.contrib.staticfiles.finders.DefaultStorageFinder',
      # other finders..
      # 'compressor.finders.CompressorFinder',
  )
  '''
  INSTALLED_APPS = (
      'django.contrib.admin',
      'django.contrib.auth',
      'django.contrib.contenttypes',
      'django.contrib.sessions',
      'django.contrib.sites',
      'django.contrib.messages',
      'django.contrib.staticfiles',
      'blog',
      'ckeditor',
      'reviewandrating',
      'links',
      'allauth',
      'allauth.account',
      'allauth.socialaccount',
      'allauth.socialaccount.providers.facebook',
      'allauth.socialaccount.providers.google',
      'allauth.socialaccount.providers.linkedin',
      'import_export',
      'haystack',
      'mathfilters',
  
  )
  # Ankur's Setting.py
  AUTHENTICATION_BACKENDS = (
      'django.contrib.auth.backends.ModelBackend',
      'allauth.account.auth_backends.AuthenticationBackend',
  )
  
  TEMPLATE_CONTEXT_PROCESSORS = (
      'django.contrib.auth.context_processors.auth',
      'django.core.context_processors.debug',
      "django.core.context_processors.request",
      'django.core.context_processors.i18n',
      'django.core.context_processors.media',
      'django.core.context_processors.static',
      'django.core.context_processors.tz',
      'django.contrib.messages.context_processors.messages',
      'django.core.context_processors.request',
      'allauth.account.context_processors.account',
  
  
  
  )
  SITE_ID = 3
  AUTH_PROFILE_MODULE = 'links.UserProfile'
  LOGIN_URL = '/'
  
  SOCIALACCOUNT_ADAPTER = 'links.my_adapter.MyAdapter'
  
  SOCIALACCOUNT_QUERY_EMAIL = True
  SOCIALACCOUNT_PROVIDERS = {
      'facebook': {
          'SCOPE': ['email'],
          'AUTH_PARAMS': {'auth_type': 'reauthenticate'},
          'METHOD': 'js_sdk',
          'VERIFIED_EMAIL': False
      },
  
      'google':
          {'SCOPE': ['profile', 'email'],
           'AUTH_PARAMS': {'access_type': 'online'}},
      'linkedin':
          {'SCOPE': ['r_emailaddress'],
           'PROFILE_FIELDS': ['id',
                             'first-name',
                              'last-name',
                              'email-address',
                              'picture-url',
                              'public-profile-url']}
  
  }
  
  LOGIN_REDIRECT_URL = '/'
  
  MIDDLEWARE_CLASSES = (
      'django.contrib.sessions.middleware.SessionMiddleware',
      'django.middleware.common.CommonMiddleware',
      'django.middleware.csrf.CsrfViewMiddleware',
      'django.contrib.auth.middleware.AuthenticationMiddleware',
      'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
      'django.contrib.messages.middleware.MessageMiddleware',
      'django.middleware.clickjacking.XFrameOptionsMiddleware',
      'django.middleware.security.SecurityMiddleware',
  )
  ROOT_URLCONF = 'pom.urls'
  
  TEMPLATES = [
      {
          'BACKEND': 'django.template.backends.django.DjangoTemplates',
          'DIRS': ['/home/ubuntu/pom/templates/'],  # This is where you add the template directory
          'APP_DIRS': True,
          'OPTIONS': {
              'context_processors': [
                  'django.template.context_processors.debug',
                  'django.template.context_processors.request',
                  'django.contrib.auth.context_processors.auth',
                  'django.contrib.messages.context_processors.messages',
                  'allauth.account.context_processors.account',
                  'allauth.socialaccount.context_processors.socialaccount',
              ],
          },
      },
  ]
  WSGI_APPLICATION = 'pom.wsgi.application'
  HAYSTACK_CONNECTIONS = {
      'default': {
          'ENGINE': 'haystack.backends.solr_backend.SolrEngine',
          'URL': 'http://localhost:8983/solr/',
          'TIMEOUT': 60 * 5,
          'INCLUDE_SPELLING': True,
          'BATCH_SIZE': 100,
          'EXCLUDED_INDEXES': ['thirdpartyapp.search_indexes.BarIndex'],
      }
  }
  
  # Database
  # https://docs.djangoproject.com/en/1.8/ref/settings/#databases
  
  DATABASES = {
      'default': {
          'ENGINE': 'django.db.backends.mysql',
          'NAME': 'hidden',
          'USER': 'ubuntu',
          'PASSWORD': '',
          'HOST': 'localhost',
          'PORT': '3306',
      }
  }
  
  
  # Internationalization
  # https://docs.djangoproject.com/en/1.8/topics/i18n/
  
  LANGUAGE_CODE = 'en-us'
  
  TIME_ZONE = 'Asia/Kolkata'
  
  USE_I18N = True
  
  USE_L10N = True
  
  USE_TZ = True
  
  
  # Static files (CSS, JavaScript, Images)
  # https://docs.djangoproject.com/en/1.8/howto/static-files/
  
  STATIC_URL = '/static/'
  
  STATICFILES_DIRS = (
      '',
      '/home/ubuntu/pom/static/img/',
      '/home/ubuntu/pom/static/css/',
      '/home/ubuntu/pom/static/js/',
  )
  
  # TEMPLATE_LOADERS = (
  # 'django.template.loaders.filesystem.Loader',
  #     'django.template.loaders.app_directories.Loader',
  #     #django.template.loaders.eggs.Loader',
  # )
  
  TEMPLATE_DIRS = (
      # os.path.join(BASE_DIR, 'templates'),
      '/home/ubuntu/pom/templates/',
  
  )
  CKEDITOR_CONFIGS = {
      'default': {
          'toolbar': 'full',
          'height': 300,
          'width': 900,
      },
  }
  
  CKEDITOR_UPLOAD_PATH = "uploads/"
  
  CKEDITOR_IMAGE_BACKEND = 'Pillow'
  
  CKEDITOR_JQUERY_URL = '//ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js'
  
  STATIC_ROOT = '/home/ubuntu/pom/static/'
  
  MEDIA_ROOT = '/home/ubuntu/pom/media/'
  
  MEDIA_URL = '/media/'
  
  HAYSTACK_SIGNAL_PROCESSOR = 'haystack.signals.RealtimeSignalProcessor'
  </code></pre>
  
  <p>The wsgi.py file is as follows:</p>
  
  <pre><code>"""
  WSGI config for pom project.
  
  It exposes the WSGI callable as a module-level variable named ``application``.
  
  For more information on this file, see
  https://docs.djangoproject.com/en/1.8/howto/deployment/wsgi/
  """
  
  import os
  
  from django.core.wsgi import get_wsgi_application
  import sys
  from os.path import abspath, dirname, join
  #sys.path.insert(0, '/home/ubuntu/deploy/pom')
  sys.path.insert(0, abspath(join(dirname(__file__), "../")))
  os.environ.setdefault("DJANGO_SETTINGS_MODULE", "pom.settings")
  
  application = get_wsgi_application()
  </code></pre>