我在访问我的域时得到这个：我看到我的默认,显示了http500错误django模板.

我有gunicorn设置：

command = '/usr/local/bin/gunicorn'
logfile = "/home/ubuntu/virtualenv/myapp/error/gunicorn.log"
loglevel = "info"
pythonpath = '/home/ubuntu/virtualenv/myapp'
bind = '127.0.0.1:8001'
workers = 3

我有Nginx配置：

server {
        listen       80;
        server_name *.myapp.com;
        access_log /home/ubuntu/virtualenv/myapp/error/access.log;
        error_log /home/ubuntu/virtualenv/myapp/error/error.log warn;
        connection_pool_size 2048;

        fastcgi_buffer_size 4K;
        fastcgi_buffers 64 4k;

        root /home/ubuntu/virtualenv/myapp/homelaunch/;

        location /static/ {
            alias /home/ubuntu/virtualenv/myapp/homelaunch/static/;
            #alias /static/;
            #root /home/ubuntu/virtualenv/myapp/homelaunch/;
        }

        location / {
            proxy_pass http://127.0.0.1:8001;
            proxy_set_header Host $host;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            #proxy_set_header X-Forwarded-Host $server_name;
            #proxy_set_header X-Real-IP $remote_addr;
            add_header P3P 'CP="ALL DSP COR PSAa PSDa OUR NOR ONL UNI COM NAV"';
        }
    }

settings.py

#### LOCAL ENV
#DEBUG = True
#TEMPLATE_DEBUG = True

#### PRODUCTION ENV
DEBUG = False
TEMPLATE_DEBUG = False

ADMINS = (
        ('xxx','xxx@gmail.com'),#('xxx','joe@myapp.com'),)

MANAGERS = ADMINS

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.MysqL',# Add 'postgresql_psycopg2','MysqL','sqlite3' or 'oracle'.
        'NAME': 'launch',# Or path to database file if using sqlite3.
        # The following settings are not used with sqlite3:
        'USER': 'root','PASSWORD': 'xxx','HOST': '',# Empty for localhost through domain sockets or '127.0.0.1' for localhost through TCP.
        'PORT': '',# Set to empty string for default.
    }
}

# Hosts/domain names that are valid for this site; required if DEBUG is False
# See https://docs.djangoproject.com/en/1.5/ref/settings/#allowed-hosts
ALLOWED_HOSTS = ['myapp.com','zzz.zz.zzz.zzz','ec2-zz-zz-zz-zz.compute-1.amazonaws.com']
#### MODIFY THIS ^^^^^^^^^^^^^^ WHEN USING IN PRODUCTION - DJANGO 1.5.
######## if this is left blank in production,it will not load.

# Local time zone for this installation. Choices can be found here:
# http://en.wikipedia.org/wiki/List_of_tz_zones_by_name
# although not all choices may be available on all operating systems.
# In a Windows environment this must be set to your system time zone.
TIME_ZONE = 'America/Chicago'

# Language code for this installation. All choices can be found here:
# http://www.i18nguy.com/unicode/language-identifiers.html
LANGUAGE_CODE = 'en-us'

SITE_ID = 1

# If you set this to False,Django will make some optimizations so as not
# to load the internationalization machinery.
USE_I18N = True

# If you set this to False,Django will not format dates,numbers and
# calendars according to the current locale.
USE_L10N = True

# If you set this to False,Django will not use timezone-aware datetimes.
USE_TZ = True

# Absolute filesystem path to the directory that will hold user-uploaded files.
# Example: "/var/www/example.com/media/"
MEDIA_ROOT = ''

# URL that handles the media served from MEDIA_ROOT. Make sure to use a
# trailing slash.
# Examples: "http://example.com/media/","http://media.example.com/"
MEDIA_URL = ''

# Absolute path to the directory static files should be collected to.
# Don't put anything in this directory yourself; store your static files
# in apps' "static/" subdirectories and in STATICFILES_DIRS.
# Example: "/var/www/example.com/static/"
STATIC_ROOT = '/home/ubuntu/virtualenv/myapp/homelaunch/static/'
#STATIC_ROOT = '/static/'
# URL prefix for static files.
# Example: "http://example.com/static/","http://static.example.com/"
#STATIC_URL = '/home/ubuntu/virtualenv/myapp/homelaunch/static/'
STATIC_URL = '/static/'
# Additional locations of static files
STATICFILES_DIRS = (
    # Put strings here,like "/home/html/static" or "C:/www/django/static".
    # Always use forward slashes,even on Windows.
    # Don't forget to use absolute paths,not relative paths.
    #'/home/ubuntu/virtualenv/myapp/homelaunch/static/',)

# List of finder classes that know how to find static files in
# varIoUs locations.
STATICFILES_FINDERS = (
    'django.contrib.staticfiles.finders.FileSystemFinder','django.contrib.staticfiles.finders.AppDirectoriesFinder',#    'django.contrib.staticfiles.finders.DefaultStorageFinder',)

# Make this unique,and don't share it with anybody.
SECRET_KEY = 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx'

# List of callables that know how to import templates from varIoUs sources.
TEMPLATE_LOADERS = (
    'django.template.loaders.filesystem.Loader','django.template.loaders.app_directories.Loader','django.template.loaders.eggs.Loader',)

MIDDLEWARE_CLASSES = (
    'django.middleware.common.CommonMiddleware','django.contrib.sessions.middleware.SessionMiddleware','django.middleware.csrf.CsrfViewMiddleware','django.contrib.auth.middleware.AuthenticationMiddleware','django.contrib.messages.middleware.MessageMiddleware','django.middleware.clickjacking.XFrameOptionsMiddleware',)

ROOT_URLconf = 'myapp.urls'

# Python dotted path to the WSGI application used by Django's runserver.
WSGI_APPLICATION = 'myapp.wsgi.application'

TEMPLATE_DIRS = (
    # Put strings here,like "/home/html/django_templates" or "C:/www/django/templates".
    # Always use forward slashes,not relative paths.
    '/home/ubuntu/virtualenv/myapp/homelaunch/templates',)

INSTALLED_APPS = (
    'django.contrib.auth','django.contrib.contenttypes','django.contrib.sessions','django.contrib.sites','django.contrib.messages','django.contrib.staticfiles','south','homelaunch','gunicorn',# Uncomment the next line to enable the admin:
    # 'django.contrib.admin',# Uncomment the next line to enable admin documentation:
    # 'django.contrib.admindocs',)

# A sample logging configuration. The only tangible logging
# performed by this configuration is to send an email to
# the site admins on every HTTP 500 error when DEBUG=False.
# See http://docs.djangoproject.com/en/dev/topics/logging for
# more details on how to customize your logging configuration.
LOGGING = {
    'version': 1,'disable_existing_loggers': False,'filters': {
        'require_debug_false': {
            '()': 'django.utils.log.requiredebugFalse'
        }
    },'handlers': {
        'mail_admins': {
            'level': 'ERROR','filters': ['require_debug_false'],'class': 'django.utils.log.AdminEmailHandler'
        }
    },'loggers': {
        'django.request': {
            'handlers': ['mail_admins'],'level': 'ERROR','propagate': True,},}
}

在这个Nginx的error_log中我看到：

2013/10/25 00:31:49 [error] 1840#0: *1 connect() Failed (111: Connection refused) while connecting to upstream,client: xx.xxx.xx.xxx,server: myapp.com,request: "GET / HTTP/1.1",upstream: "http://127.0.0.1:8001/",host: "myapp.com"

在这个Nginx配置的access_log中我看到：

xx.xxx.xx.xxx - - [25/Oct/2013:00:31:49 +0000] "GET / HTTP/1.1" 502 173 "-" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:24.0) Gecko/20100101 Firefox/24.0"

我已经尝试阅读问题并看到添加：

  fastcgi_buffer_size 4K;
    fastcgi_buffers 64 4k;

到Nginx配置可能会有所帮助,但事实并非如此.

我对如何从这里调试这个问题感到困惑？有人可以帮忙吗？

谢谢.