Context Navigation

← Previous Ticket
Next Ticket →

#17658 closed Bug

Django wsgi.py segfaults Apache — at Version 2

Reported by:	harel@…	Owned by:	nobody
Component:	Uncategorized	Version:	1.3
Severity:	Normal	Keywords:	wsgi apache segfault
Cc:	anssi.kaariainen@…	Triage Stage:	Unreviewed
Has patch:	no	Needs documentation:	no
Needs tests:	no	Patch needs improvement:	no
Easy pickings:	no	UI/UX:	no

Description (last modified by Ramiro Morales)

After a very standard and minor release, our Apache/Nginx/Django/wsgi setup ceased to function with the only error "Premature end of script headers: django.wsgi" in the apache log.
There is no expat problem (checked with sample wsgi app with and without that module include). The server was working fine. The codebase was updated slightly and apache restarted when the horrors began. The codebase was rolled back and still the problem persists.
Below are my wsgi file, apache config and a dump from running wsgi under the debuger.

I will have to rebuilt the server very soon, as the problem just won't go away. I am holding off in case anyone here finds this interesting and needs more information.

The system is Debian Squeeze, Apache/2.2.16 (Debian), Python 2.6.4, Django 1.3.1. modwsgi 3.3-2
All packages are installed via apt-get/pip. Another server with similar setup doesn't exhibit the problem.

wsgi file:

import sys
import os
 
sys.path.append('/home/app/')
sys.path.append('/home/app/topmodule/')

os.environ['DJANGO_SETTINGS_MODULE'] = 'app.settings'
os.environ["CELERY_LOADER"] = "django"

import app.settings
import django.core.handlers.wsgi

application = django.core.handlers.wsgi.WSGIHandler()

apache config:

WSGIScriptAlias / /home/app/topmodule/django.wsgi
WSGIDaemonProcess app user=app group=app processes=6 threads=1
WSGIProcessGroup app 
Have also tried with : 
WSGIApplicationGroup %{GLOBAL}

Django Middleware:

'django.middleware.common.CommonMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'glowconsole.middleware.ViewNameMiddleware',
'django.middleware.gzip.GZipMiddleware'

Debugger dump when running apache2 -X with the pdb debugger wrapper (also here: http://paste.pocoo.org/show/546803/)

batman:/home/harel# /usr/sbin/apache2 -X
['/usr/local/lib/python2.6/site-packages/setuptools-0.6c11-py2.6.egg', '/usr/local/lib/python26.zip', '/usr/local/lib/python2.6', '/usr/local/lib/python2.6/plat-linux2', '/usr/local/lib/python2.6/lib-tk', '/usr/local/lib/python2.6/lib-old', '/usr/local/lib/python2.6/lib-dynload', '/usr/local/lib/python2.6/site-packages', '/usr/local/lib/python2.6/site-packages/PIL', '/home/glowconsole/', '/home/glowconsole/glowconsole/', '/usr/local/lib/python2.6/site-packages/django']
> /usr/local/lib/python2.6/site-packages/django/core/handlers/wsgi.py(240)__call__()
-> from django.conf import settings
(Pdb) n
> /usr/local/lib/python2.6/site-packages/django/core/handlers/wsgi.py(244)__call__()
-> if self._request_middleware is None:
(Pdb) n
> /usr/local/lib/python2.6/site-packages/django/core/handlers/wsgi.py(245)__call__()
-> self.initLock.acquire()
(Pdb) n
> /usr/local/lib/python2.6/site-packages/django/core/handlers/wsgi.py(246)__call__()
-> try:
(Pdb) n
> /usr/local/lib/python2.6/site-packages/django/core/handlers/wsgi.py(247)__call__()
-> try:
(Pdb) n
> /usr/local/lib/python2.6/site-packages/django/core/handlers/wsgi.py(249)__call__()
-> if self._request_middleware is None:
(Pdb) n
> /usr/local/lib/python2.6/site-packages/django/core/handlers/wsgi.py(250)__call__()
-> self.load_middleware()
(Pdb) n
> /usr/local/lib/python2.6/site-packages/django/core/handlers/wsgi.py(256)__call__()
-> self.initLock.release()
(Pdb) n
> /usr/local/lib/python2.6/site-packages/django/core/handlers/wsgi.py(258)__call__()
-> set_script_prefix(base.get_script_name(environ))
(Pdb) n
> /usr/local/lib/python2.6/site-packages/django/core/handlers/wsgi.py(259)__call__()
-> signals.request_started.send(sender=self.__class__)
(Pdb) n
> /usr/local/lib/python2.6/site-packages/django/core/handlers/wsgi.py(260)__call__()
-> try:
(Pdb) n
> /usr/local/lib/python2.6/site-packages/django/core/handlers/wsgi.py(261)__call__()
-> try:
(Pdb) n
> /usr/local/lib/python2.6/site-packages/django/core/handlers/wsgi.py(262)__call__()
-> request = self.request_class(environ)
(Pdb) n
> /usr/local/lib/python2.6/site-packages/django/core/handlers/wsgi.py(272)__call__()
-> response = self.get_response(request)
(Pdb) l
267  	                        'status_code': 400,
268  	                    }
269  	                )
270  	                response = http.HttpResponseBadRequest()
271  	            else:
272  ->	                response = self.get_response(request)
273  	        finally:
274  	            signals.request_finished.send(sender=self.__class__)
275  	
276  	        try:
277  	            status_text = STATUS_CODE_TEXT[response.status_code]
(Pdb) n
Segmentation fault

Some var dumps from that debugger session (also here: http://paste.pocoo.org/show/546846/):

(Pdb) request
<WSGIRequest
GET:<QueryDict: {}>,
POST:<QueryDict: {}>,
COOKIES:{'csrftoken': '6f41c55c934085b286fccb834e910643',
 'sessionid': '58a6595013bf69a456a532b318446315',
 'ys-account_id': 'n%3A585',
 'ys-ad_preview_window-1332956': 'o%3Awidth%3Dn%253A532%5Eheight%3Dn%253A472%5Ex%3Dn%253A455%5Ey%3Dn%253A272',
 'ys-client_id': 'n%3A202',
 'ys-title': 's%3ASlots%20Farm%20-CA%205'},
META:{'DOCUMENT_ROOT': '/etc/apache2/htdocs',
 'GATEWAY_INTERFACE': 'CGI/1.1',
 'HTTP_ACCEPT': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
 'HTTP_ACCEPT_CHARSET': 'ISO-8859-1,utf-8;q=0.7,*;q=0.3',
 'HTTP_ACCEPT_ENCODING': 'gzip,deflate,sdch',
 'HTTP_ACCEPT_LANGUAGE': 'en-GB,en-US;q=0.8,en;q=0.6',
 'HTTP_CACHE_CONTROL': 'max-age=0',
 'HTTP_CONNECTION': 'close',
 'HTTP_COOKIE': 'ys-ad_preview_window-1332956=o%3Awidth%3Dn%253A532%5Eheight%3Dn%253A472%5Ex%3Dn%253A455%5Ey%3Dn%253A272; ys-account_id=n%3A585; ys-client_id=n%3A202; ys-title=s%3ASlots%20Farm%20-CA%205; csrftoken=6f41c55c934085b286fccb834e910643; sessionid=58a6595013bf69a456a532b318446315',
 'HTTP_HOST': 'batman:8100',
 'HTTP_USER_AGENT': 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/535.11 (KHTML, like Gecko) Chrome/17.0.963.46 Safari/535.11',
 'HTTP_X_FORWARDED_FOR': '217.138.9.130',
 'PATH_INFO': u'/',
 'PATH_TRANSLATED': '/home/glowconsole/glowconsole/django.wsgi/',
 'QUERY_STRING': '',
 'REMOTE_ADDR': '81.94.195.18',
 'REMOTE_PORT': '54800',
 'REQUEST_METHOD': 'GET',
 'REQUEST_URI': '/',
 'SCRIPT_FILENAME': '/home/glowconsole/glowconsole/django.wsgi',
 'SCRIPT_NAME': u'',
 'SERVER_ADDR': '81.94.195.18',
 'SERVER_ADMIN': 'harel@xxxxxx.com',
 'SERVER_NAME': 'batman',
 'SERVER_PORT': '8100',
 'SERVER_PROTOCOL': 'HTTP/1.0',
 'SERVER_SIGNATURE': '<address>Apache/2.2.16 (Debian) Server at batman Port 8100</address>\n',
 'SERVER_SOFTWARE': 'Apache/2.2.16 (Debian)',
 'mod_wsgi.application_group': 'theglowmachine.com:8100|',
 'mod_wsgi.callable_object': 'application',
 'mod_wsgi.handler_script': '',
 'mod_wsgi.input_chunked': '0',
 'mod_wsgi.listener_host': 'batman',
 'mod_wsgi.listener_port': '8100',
 'mod_wsgi.process_group': '',
 'mod_wsgi.request_handler': 'wsgi-script',
 'mod_wsgi.script_reloading': '1',
 'mod_wsgi.version': (3, 3),
 'wsgi.errors': <mod_wsgi.Log object at 0x7f4f886a7df0>,
 'wsgi.file_wrapper': <built-in method file_wrapper of mod_wsgi.Adapter object at 0x7f4f87277990>,
 'wsgi.input': <mod_wsgi.Input object at 0x7f4f886a7db0>,
 'wsgi.multiprocess': True,
 'wsgi.multithread': True,
 'wsgi.run_once': False,
 'wsgi.url_scheme': 'http',
 'wsgi.version': (1, 1)}>

(Pdb) locals()

{'start_response': <built-in method start_response of mod_wsgi.Adapter object at 0x7f4f87277990>, 'request': <WSGIRequest
GET:<QueryDict: {}>,
POST:<QueryDict: {}>,
COOKIES:{'csrftoken': '6f41c55c934085b286fccb834e910643',
 'sessionid': '58a6595013bf69a456a532b318446315',
 'ys-account_id': 'n%3A585',
 'ys-ad_preview_window-1332956': 'o%3Awidth%3Dn%253A532%5Eheight%3Dn%253A472%5Ex%3Dn%253A455%5Ey%3Dn%253A272',
 'ys-client_id': 'n%3A202',
 'ys-title': 's%3ASlots%20Farm%20-CA%205'},
META:{'DOCUMENT_ROOT': '/etc/apache2/htdocs',
 'GATEWAY_INTERFACE': 'CGI/1.1',
 'HTTP_ACCEPT': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
 'HTTP_ACCEPT_CHARSET': 'ISO-8859-1,utf-8;q=0.7,*;q=0.3',
 'HTTP_ACCEPT_ENCODING': 'gzip,deflate,sdch',
 'HTTP_ACCEPT_LANGUAGE': 'en-GB,en-US;q=0.8,en;q=0.6',
 'HTTP_CACHE_CONTROL': 'max-age=0',
 'HTTP_CONNECTION': 'close',
 'HTTP_COOKIE': 'ys-ad_preview_window-1332956=o%3Awidth%3Dn%253A532%5Eheight%3Dn%253A472%5Ex%3Dn%253A455%5Ey%3Dn%253A272; ys-account_id=n%3A585; ys-client_id=n%3A202; ys-title=s%3ASlots%20Farm%20-CA%205; csrftoken=6f41c55c934085b286fccb834e910643; sessionid=58a6595013bf69a456a532b318446315',
 'HTTP_HOST': 'batman:8100',
 'HTTP_USER_AGENT': 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/535.11 (KHTML, like Gecko) Chrome/17.0.963.46 Safari/535.11',
 'HTTP_X_FORWARDED_FOR': '217.138.9.130',
 'PATH_INFO': u'/',
 'PATH_TRANSLATED': '/home/glowconsole/glowconsole/django.wsgi/',
 'QUERY_STRING': '',
 'REMOTE_ADDR': '81.94.195.18',
 'REMOTE_PORT': '54800',
 'REQUEST_METHOD': 'GET',
 'REQUEST_URI': '/',
 'SCRIPT_FILENAME': '/home/glowconsole/glowconsole/django.wsgi',
 'SCRIPT_NAME': u'',
 'SERVER_ADDR': '81.94.195.18',
 'SERVER_ADMIN': 'harel@thisisglow.com',
 'SERVER_NAME': 'batman',
 'SERVER_PORT': '8100',
 'SERVER_PROTOCOL': 'HTTP/1.0',
 'SERVER_SIGNATURE': '<address>Apache/2.2.16 (Debian) Server at batman Port 8100</address>\n',
 'SERVER_SOFTWARE': 'Apache/2.2.16 (Debian)',
 'mod_wsgi.application_group': 'theglowmachine.com:8100|',
 'mod_wsgi.callable_object': 'application',
 'mod_wsgi.handler_script': '',
 'mod_wsgi.input_chunked': '0',
 'mod_wsgi.listener_host': 'batman',
 'mod_wsgi.listener_port': '8100',
 'mod_wsgi.process_group': '',
 'mod_wsgi.request_handler': 'wsgi-script',
 'mod_wsgi.script_reloading': '1',
 'mod_wsgi.version': (3, 3),
 'wsgi.errors': <mod_wsgi.Log object at 0x7f4f886a7df0>,
 'wsgi.file_wrapper': <built-in method file_wrapper of mod_wsgi.Adapter object at 0x7f4f87277990>,
 'wsgi.input': <mod_wsgi.Input object at 0x7f4f886a7db0>,
 'wsgi.multiprocess': True,
 'wsgi.multithread': True,
 'wsgi.run_once': False,
 'wsgi.url_scheme': 'http', 
 'wsgi.version': (1, 1)}>, 'self': <django.core.handlers.wsgi.WSGIHandler object at 0x7f4f886a7d90>, 'environ': {'mod_wsgi.listener_port': '8100', 'HTTP_COOKIE': 'ys-ad_preview_window-1332956=o%3Awidth%3Dn%253A532%5Eheight%3Dn%253A472%5Ex%3Dn%253A455%5Ey%3Dn%253A272; ys-account_id=n%3A585; ys-client_id=n%3A202; ys-title=s%3ASlots%20Farm%20-CA%205; csrftoken=6f41c55c934085b286fccb834e910643; sessionid=58a6595013bf69a456a532b318446315', 'mod_wsgi.listener_host': 'batman', 'SERVER_SOFTWARE': 'Apache/2.2.16 (Debian)', 'SCRIPT_NAME': u'', 'mod_wsgi.handler_script': '', 'SERVER_SIGNATURE': '<address>Apache/2.2.16 (Debian) Server at batman Port 8100</address>\n', 'REQUEST_METHOD': 'GET', 'PATH_INFO': u'/', 'SERVER_PROTOCOL': 'HTTP/1.0', 'QUERY_STRING': '', 'HTTP_ACCEPT_CHARSET': 'ISO-8859-1,utf-8;q=0.7,*;q=0.3', 'HTTP_USER_AGENT': 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/535.11 (KHTML, like Gecko) Chrome/17.0.963.46 Safari/535.11', 'HTTP_CONNECTION': 'close', 'SERVER_NAME': 'batman', 'REMOTE_ADDR': '81.94.195.18', 'mod_wsgi.request_handler': 'wsgi-script', 'wsgi.url_scheme': 'http', 'PATH_TRANSLATED': '/home/glowconsole/glowconsole/django.wsgi/', 'SERVER_PORT': '8100', 'wsgi.multiprocess': True, 'mod_wsgi.input_chunked': '0', 'SERVER_ADDR': '81.94.195.18', 'DOCUMENT_ROOT': '/etc/apache2/htdocs', 'mod_wsgi.process_group': '', 'SCRIPT_FILENAME': '/home/glowconsole/glowconsole/django.wsgi', 'SERVER_ADMIN': 'harel@thisisglow.com', 'wsgi.input': <mod_wsgi.Input object at 0x7f4f886a7db0>, 'HTTP_HOST': 'batman:8100', 'wsgi.multithread': True, 'mod_wsgi.callable_object': 'application', 'HTTP_CACHE_CONTROL': 'max-age=0', 'REQUEST_URI': '/', 'HTTP_ACCEPT': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8', 'wsgi.version': (1, 1), 'GATEWAY_INTERFACE': 'CGI/1.1', 'HTTP_X_FORWARDED_FOR': '217.138.9.130', 'wsgi.errors': <mod_wsgi.Log object at 0x7f4f886a7df0>, 'REMOTE_PORT': '54800', 'HTTP_ACCEPT_LANGUAGE': 'en-GB,en-US;q=0.8,en;q=0.6', 'mod_wsgi.version': (3, 3), 'wsgi.run_once': False, 'mod_wsgi.application_group': 'theglowmachine.com:8100|', 'mod_wsgi.script_reloading': '1', 'wsgi.file_wrapper': <built-in method file_wrapper of mod_wsgi.Adapter object at 0x7f4f87277990>, 'HTTP_ACCEPT_ENCODING': 'gzip,deflate,sdch'}, 'settings': <django.conf.LazySettings object at 0x7f4f721f6a50>}

Change History (2)

comment:1 by anonymous, 12 years ago

apologies for not using wiki formatting. noticed too late after posting and cannot edit

comment:2 by Ramiro Morales, 12 years ago

Description:	modified (diff)

Note: See TracTickets for help on using tickets.

Download in other formats:

Issues

Context Navigation

#17658 closed Bug

Django wsgi.py segfaults Apache — at Version 2

Description (last modified by Ramiro Morales)

Change History (2)

comment:1 by anonymous, 12 years ago

comment:2 by Ramiro Morales, 12 years ago

Download in other formats:

Django Links

Learn More

Get Involved

Get Help

Follow Us

Support Us