Django - Application backend read Error

08 Nov 2014, 20:08

Django on a clean Server 2012R2 instance (Amazon EC2)

I've tried setting up a django site using instructions found here: http://www.helicontech.com/articles/running-django-on-windows-with-performance-tests/
I'm using Helizon Zoo module version 3.1.98.538 (I have tried both on separate instances yeilding the same exact same result on both; this is from the beta feed as suggested here: http://www.helicontech.com/community/Zoo_Python_crashes-6-2968.html?p=6704&hilit=backend%20read%20Error#p6704)
Browsing to localhost/ZooPythonProject, I get the base python project page, this works before I install django.
Once django is installed and I change the options in web.config as suggested, once I refresh the page I get a internal server 500 error:

Code: Select all: Error: Helicon Zoo module has caught up an error. Please see the details below. Worker Status: The process was created Windows error: The pipe has been ended. (ERROR CODE: 109) Internal module error: message: Application backend read Error. type: ZooException file: App\Jobs\JobBase.cpp line: 531 version: 3.1.98.538 STDERR: Empty stderr Environment variables: ALLUSERSPROFILE C:\ProgramData APPDATA C:\Windows\system32\config\systemprofile\AppData\Roaming APPL_ID ZooPythonProject APPL_PHYSICAL_PATH C:\inetpub\wwwroot\ZooPythonProject APPL_PHYSICAL_SHORT_PATH C:\inetpub\wwwroot\ZOOPYT~1 APPL_VIRTUAL_PATH /ZooPythonProject APP_POOL_CONFIG C:\inetpub\temp\apppools\ZooPythonProject\ZooPythonProject.config APP_POOL_ID ZooPythonProject COMMONPROGRAMFILES C:\Program Files\Common Files COMMONPROGRAMFILES(X86) C:\Program Files (x86)\Common Files COMMONPROGRAMW6432 C:\Program Files\Common Files COMPUTERNAME WIN-IAK09MB251B COMSPEC C:\Windows\system32\cmd.exe CONSOLE_URL console DEPLOY_FILE deploy.py DJANGO_SETTINGS_MODULE project.settings ERROR_LOG_DIR log FP_NO_HOST_CHECK NO HOST 127.0.0.1 IIS_BINDNGS http=*:80: INSTANCE_ID 1 LOCALAPPDATA C:\Windows\system32\config\systemprofile\AppData\Local NUMBER_OF_PROCESSORS 1 OS Windows_NT PATH C:\inetpub\wwwroot\ZooPythonProject\venv\Scripts;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files\Amazon\cfn-bootstrap\;C:\Program Files\Microsoft\Web Platform Installer\ PATHEXT .COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC PROCESSOR_ARCHITECTURE AMD64 PROCESSOR_IDENTIFIER Intel64 Family 6 Model 62 Stepping 4, GenuineIntel PROCESSOR_LEVEL 6 PROCESSOR_REVISION 3e04 PROGRAMDATA C:\ProgramData PROGRAMFILES C:\Program Files PROGRAMFILES(X86) C:\Program Files (x86) PROGRAMW6432 C:\Program Files PSMODULEPATH C:\Windows\system32\WindowsPowerShell\v1.0\Modules\;C:\Program Files (x86)\AWS Tools\PowerShell\ PUBLIC C:\Users\Public PYTHONPATH C:\inetpub\wwwroot\ZooPythonProject\venv\lib\site-packages;C:\inetpub\wwwroot\ZooPythonProject\venv\lib;C:\inetpub\wwwroot\ZooPythonProject;C:\inetpub\wwwroot\ZooPythonProject\project SITE_NAME DEFAULT WEB SITE SITE_PHYSICAL_PATH C:\inetpub\wwwroot SYSTEMDRIVE C: SYSTEMROOT C:\Windows TEMP C:\Windows\TEMP TMP C:\Windows\TEMP USERDOMAIN WORKGROUP USERNAME WIN-IAK09MB251B$ USERPROFILE C:\Windows\system32\config\systemprofile VIRTUAL_ENV C:\inetpub\wwwroot\ZooPythonProject\venv WINDIR C:\Windows Helicon Zoo engine settings appName python.project appFullPath C:\python27\python.exe appDirectory C:\inetpub\wwwroot\ZooPythonProject appArguments C:\Zoo\Workers\python\zoofcgi.py deployArguments transportName NamedPipe protocol fastcgi scriptProcessor python.2.7.wsgi errorLogDir C:\inetpub\wwwroot\ZooPythonProject\log postBufferDir watchFileChangesMask host 127.0.0.1 port %PORT% proxyPass minInstances 1 maxInstances 1 minRequestsPerWorker 3 maxRequestsPerWorker 15 portLower 49152 portUpper 65535 workerRequestTimeout 30 timeLimit 0 postBuffer 1024 memoryLimit 0 gracefulShutdownTimeout 30 Web.config variables APPL_ID ZooPythonProject APPL_PHYSICAL_PATH C:\inetpub\wwwroot\ZooPythonProject APPL_PHYSICAL_SHORT_PATH C:\inetpub\wwwroot\ZOOPYT~1 APPL_VIRTUAL_PATH /ZooPythonProject CONSOLE_URL console DEPLOY_FILE deploy.py DJANGO_SETTINGS_MODULE project.settings ERROR_LOG_DIR log HOST 127.0.0.1 IIS_BINDNGS http=*:80: INSTANCE_ID 1 PATH C:\inetpub\wwwroot\ZooPythonProject\venv\Scripts;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files\Amazon\cfn-bootstrap\;C:\Program Files\Microsoft\Web Platform Installer\ PYTHONPATH C:\inetpub\wwwroot\ZooPythonProject\venv\lib\site-packages;C:\inetpub\wwwroot\ZooPythonProject\venv\lib;C:\inetpub\wwwroot\ZooPythonProject;C:\inetpub\wwwroot\ZooPythonProject\project SITE_NAME DEFAULT WEB SITE SITE_PHYSICAL_PATH C:\inetpub\wwwroot VIRTUAL_ENV C:\inetpub\wwwroot\ZooPythonProject\venv

Here is the worker error log:

Code: Select all: No handlers could be found for logger "django.request" Traceback (most recent call last): File "C:\Zoo\Workers\python\zoofcgi.py", line 1069, in <module> run_django_app(options.django_settings_module, options.django_root) File "C:\Zoo\Workers\python\zoofcgi.py", line 999, in run_django_app FCGIServer(WSGIHandler(), app_root=django_root).run() File "C:\Zoo\Workers\python\zoofcgi.py", line 776, in run conn.run() File "C:\Zoo\Workers\python\zoofcgi.py", line 569, in run self.process_input() File "C:\Zoo\Workers\python\zoofcgi.py", line 600, in process_input self._do_stdin(rec) File "C:\Zoo\Workers\python\zoofcgi.py", line 724, in _do_stdin self._start_request(req) File "C:\Zoo\Workers\python\zoofcgi.py", line 697, in _start_request req.run() File "C:\Zoo\Workers\python\zoofcgi.py", line 515, in run protocolStatus, appStatus = self.server.handler(self) File "C:\Zoo\Workers\python\zoofcgi.py", line 862, in handler result = self.application(environ, start_response) File "C:\inetpub\wwwroot\ZooPythonProject\venv\lib\site-packages\django\core\handlers\wsgi.py", line 187, in __call__ response = self.get_response(request) File "C:\inetpub\wwwroot\ZooPythonProject\venv\lib\site-packages\django\core\handlers\base.py", line 199, in get_response response = self.handle_uncaught_exception(request, resolver, sys.exc_info()) File "C:\inetpub\wwwroot\ZooPythonProject\venv\lib\site-packages\django\core\handlers\base.py", line 236, in handle_uncaught_exception return debug.technical_500_response(request, *exc_info) File "C:\inetpub\wwwroot\ZooPythonProject\venv\lib\site-packages\django\views\debug.py", line 91, in technical_500_response html = reporter.get_traceback_html() File "C:\inetpub\wwwroot\ZooPythonProject\venv\lib\site-packages\django\views\debug.py", line 350, in get_traceback_html return t.render(c) File "C:\inetpub\wwwroot\ZooPythonProject\venv\lib\site-packages\django\template\base.py", line 148, in render return self._render(context) File "C:\inetpub\wwwroot\ZooPythonProject\venv\lib\site-packages\django\template\base.py", line 142, in _render return self.nodelist.render(context) File "C:\inetpub\wwwroot\ZooPythonProject\venv\lib\site-packages\django\template\base.py", line 844, in render bit = self.render_node(node, context) File "C:\inetpub\wwwroot\ZooPythonProject\venv\lib\site-packages\django\template\debug.py", line 80, in render_node return node.render(context) File "C:\inetpub\wwwroot\ZooPythonProject\venv\lib\site-packages\django\template\debug.py", line 90, in render output = self.filter_expression.resolve(context) File "C:\inetpub\wwwroot\ZooPythonProject\venv\lib\site-packages\django\template\base.py", line 624, in resolve new_obj = func(obj, *arg_vals) File "C:\inetpub\wwwroot\ZooPythonProject\venv\lib\site-packages\django\template\defaultfilters.py", line 769, in date return format(value, arg) File "C:\inetpub\wwwroot\ZooPythonProject\venv\lib\site-packages\django\utils\dateformat.py", line 343, in format return df.format(format_string) File "C:\inetpub\wwwroot\ZooPythonProject\venv\lib\site-packages\django\utils\dateformat.py", line 35, in format pieces.append(force_text(getattr(self, piece)())) File "C:\inetpub\wwwroot\ZooPythonProject\venv\lib\site-packages\django\utils\dateformat.py", line 268, in r return self.format('D, j M Y H:i:s O') File "C:\inetpub\wwwroot\ZooPythonProject\venv\lib\site-packages\django\utils\dateformat.py", line 35, in format pieces.append(force_text(getattr(self, piece)())) File "C:\inetpub\wwwroot\ZooPythonProject\venv\lib\site-packages\django\utils\encoding.py", line 85, in force_text s = six.text_type(s) File "C:\inetpub\wwwroot\ZooPythonProject\venv\lib\site-packages\django\utils\functional.py", line 144, in __text_cast return func(*self.__args, **self.__kw) File "C:\inetpub\wwwroot\ZooPythonProject\venv\lib\site-packages\django\utils\translation\__init__.py", line 83, in ugettext return _trans.ugettext(message) File "C:\inetpub\wwwroot\ZooPythonProject\venv\lib\site-packages\django\utils\translation\trans_real.py", line 325, in ugettext return do_translate(message, 'ugettext') File "C:\inetpub\wwwroot\ZooPythonProject\venv\lib\site-packages\django\utils\translation\trans_real.py", line 306, in do_translate _default = translation(settings.LANGUAGE_CODE) File "C:\inetpub\wwwroot\ZooPythonProject\venv\lib\site-packages\django\utils\translation\trans_real.py", line 209, in translation default_translation = _fetch(settings.LANGUAGE_CODE) File "C:\inetpub\wwwroot\ZooPythonProject\venv\lib\site-packages\django\utils\translation\trans_real.py", line 189, in _fetch "The translation infrastructure cannot be initialized before the " django.core.exceptions.AppRegistryNotReady: The translation infrastructure cannot be initialized before the apps registry is ready. Check that you don't make non-lazy gettext calls at import time.

ZooError-0-

Code: Select all: [08.11.2014 22:08:55.451521] [v 3.1.98.538] [tid 0x000008d8] [sev 2] # 29876311008 Application has been started [08.11.2014 22:08:55.545260] [v 3.1.98.538] [tid 0x000008d8] [sev 2] # 29876234512 Application has been terminated ate log file C:\inetpub\wwwroot\ZooPythonProject\log\python.project [2014_11_08 22_08_55] worker-1.log [08.11.2014 22:08:56.154595] [v 3.1.98.538] [tid 0x00000a9c] [sev 2] WorkersManager - OnProcessExit() [08.11.2014 22:08:56.154595] [v 3.1.98.538] [tid 0x00000a9c] [sev 2] WorkersManager - Worker shutdown. #2 - [pid:3276] "C:\python27\python.exe" C:\Zoo\Workers\python\zoofcgi.py [08.11.2014 22:09:25.467110] [v 3.1.98.538] [tid 0x00000a9c] [sev 2] WorkersManager - Worker closed. #2 [08.11.2014 22:10:02.092102] [v 3.1.98.538] [tid 0x00000a9c] [sev 2] WorkersManager - OnProcessExit() [08.11.2014 22:10:02.092102] [v 3.1.98.538] [tid 0x00000a9c] [sev 2] WorkersManager - Worker shutdown. #3 - [pid:2380] "C:\python27\python.exe" C:\Zoo\Workers\python\zoofcgi.py [08.11.2014 22:10:25.467595] [v 3.1.98.538] [tid 0x00000a9c] [sev 2] WorkersManager - Worker closed. #3 [08.11.2014 22:13:34.654735] [v 3.1.98.538] [tid 0x00000a9c] [sev 2] WorkersManager - OnProcessExit() [08.11.2014 22:13:34.654735] [v 3.1.98.538] [tid 0x00000a9c] [sev 2] WorkersManager - Worker shutdown. #4 - [pid:3852] "C:\python27\python.exe" C:\Zoo\Workers\python\zoofcgi.py [08.11.2014 22:13:56.248576] [v 3.1.98.538] [tid 0x00000a9c] [sev 2] WorkersManager - Worker closed. #4 [08.11.2014 22:14:13.139178] [v 3.1.98.538] [tid 0x00000a9c] [sev 2] WorkersManager - OnProcessExit() [08.11.2014 22:14:13.139178] [v 3.1.98.538] [tid 0x00000a9c] [sev 2] WorkersManager - Worker shutdown. #5 - [pid:2228] "C:\python27\python.exe" C:\Zoo\Workers\python\zoofcgi.py [08.11.2014 22:14:26.342332] [v 3.1.98.538] [tid 0x00000a9c] [sev 2] WorkersManager - Worker closed. #5 [08.11.2014 22:16:54.342382] [v 3.1.98.538] [tid 0x00000a9c] [sev 2] WorkersManager - OnProcessExit() [08.11.2014 22:16:54.342382] [v 3.1.98.538] [tid 0x00000a9c] [sev 2] WorkersManager - Worker shutdown. #6 - [pid:2496] "C:\python27\python.exe" C:\Zoo\Workers\python\zoofcgi.py [08.11.2014 22:16:56.357999] [v 3.1.98.538] [tid 0x00000a9c] [sev 2] WorkersManager - Worker closed. #6

Django project settings.py:

Code: Select all: """ Django settings for project project. For more information on this file, see https://docs.djangoproject.com/en/1.7/topics/settings/ For the full list of settings and their values, see https://docs.djangoproject.com/en/1.7/ref/settings/ """ # Build paths inside the project like this: os.path.join(BASE_DIR, ...) import os BASE_DIR = os.path.dirname(os.path.dirname(__file__)) # Quick-start development settings - unsuitable for production # See https://docs.djangoproject.com/en/1.7/howto/deployment/checklist/ # SECURITY WARNING: keep the secret key used in production secret! SECRET_KEY = '5jd%y7umf(o%0xa02nd@=(wl(z$$j#nyje^u=*19r*6kg$wfto' # SECURITY WARNING: don't run with debug turned on in production! DEBUG = True TEMPLATE_DEBUG = True ALLOWED_HOSTS = [] # Application definition INSTALLED_APPS = ( 'django.contrib.admin', 'django.contrib.auth', 'django.contrib.contenttypes', 'django.contrib.sessions', 'django.contrib.messages', 'django.contrib.staticfiles', ) 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', ) ROOT_URLCONF = 'project.urls' WSGI_APPLICATION = 'project.wsgi.application' # Database # https://docs.djangoproject.com/en/1.7/ref/settings/#databases DATABASES = { 'default': { 'ENGINE': 'django.db.backends.sqlite3', 'NAME': os.path.join(BASE_DIR, 'db.sqlite3'), } } # Internationalization # https://docs.djangoproject.com/en/1.7/topics/i18n/ LANGUAGE_CODE = 'en-us' TIME_ZONE = 'UTC' USE_I18N = True USE_L10N = True USE_TZ = True # Static files (CSS, JavaScript, Images) # https://docs.djangoproject.com/en/1.7/howto/static-files/ STATIC_URL = '/static/'

web.config

Code: Select all: <?xml version="1.0" encoding="UTF-8"?> <configuration> <system.webServer> <heliconZoo> <clear /> <application name="python.project"> <environmentVariables> <add name="VIRTUAL_ENV" value="%APPL_PHYSICAL_PATH%\venv" /> <add name="PATH" value="%APPL_PHYSICAL_PATH%\venv\Scripts;%PATH%" /> <add name="PYTHONPATH" value="%APPL_PHYSICAL_PATH%\venv\lib\site-packages;%APPL_PHYSICAL_PATH%\venv\lib;%APPL_PHYSICAL_PATH%;%APPL_PHYSICAL_PATH%\project" /> <add name="CONSOLE_URL" value="console" /> <add name="DEPLOY_FILE" value="deploy.py" /> <add name="ERROR_LOG_DIR" value="log" /> <add name="DJANGO_SETTINGS_MODULE" value="project.settings" /> </environmentVariables> </application> </heliconZoo> <handlers> <remove name="python.project#x86" /> <remove name="python.project#x64" /> <add name="python.project#x64" path="*" verb="*" modules="HeliconZoo_x64" scriptProcessor="python.2.7.wsgi" resourceType="Unspecified" requireAccess="Script" preCondition="bitness64" /> <add name="python.project#x86" path="*" verb="*" modules="HeliconZoo_x86" scriptProcessor="python.2.7.wsgi" resourceType="Unspecified" requireAccess="Script" preCondition="bitness32" />      </handlers> </system.webServer> </configuration>

Any Ideas? Is there something I'm missing or can try?
Thank you!

12 Nov 2014, 06:56

Hello,

It seems that you are trying to run the project for Django 1.6 on 1.7
You need to run Django via wsgi. To do that add the following into the web.config:

<add name="WSGI_APP" value="wsgi.application" />

Then create a file wsgi.py with the following content:

from django.core.wsgi import get_wsgi_application
application = get_wsgi_application()

15 Nov 2014, 04:05

Thanks for your post, although re-adding the wsgi line did not work; you did point me in the right direction, it definitively is a version issue.

When I installed django I just went

Code: Select all: pip install django

Figuring you guys were supreme wizards, I went right ahead and just installed the latest version of django.

Allas when is comes to servers, there is no magic, just meticulous work.

instead I installed 1.6:

Code: Select all: pip install django==1.6

Everything works perfectly now. I should have taken a hint from the guide provided to me, once python was installed, to install another version

I'm sure someone is working hard to get the newest version going. For me, it's not so crucial

Thanks again

23 Feb 2015, 11:25

In the \Zoo\Workers\python\zoofcgi.py, I changed this:

Code: Select all: from django.core.handlers.wsgi import WSGIHandler FCGIServer(WSGIHandler(), app_root=django_root).run()

for this:

Code: Select all: from django.core.wsgi import get_wsgi_application FCGIServer(get_wsgi_application(), app_root=django_root).run()

and that solved the issue for me. Django 1.7 changed the way to get the wsgi module.

Does it seems a correct solution for you?

regards

Etienne

13 Apr 2015, 03:24

Thanks you

Educa

Django - Application backend read Error

Django - Application backend read Error

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