Hi,
I am using Django 1.6 (was seeing the same behavior with 1.3 also), apache
2.2.22, mod_wsgi 3.3, on an ubuntu 12.04.4 box.
I made some I-thought-small changes to my app, and all of a sudden the web
server stalls processing the request. Easy, you say, I'm a bonehead with
an infinite loop in his code. But then when I run it under django's
"manage.py runserver", it works fine. I know that runserver does some
magic behind the scenes, but I don't really see how it can be causing this
sort of weirdness.
I am having trouble getting any debugging output. I added a little
middleware WSGI app:
from django.core.wsgi import get_wsgi_application
print >> sys.stderr, 'running django handler...'
application = get_wsgi_application()
print >> sys.stderr, 'django app:', application
class Wrapper(object):
def __init__(self, app):
self.app = app
def __call__(self, environ, start_response):
print >> sys.stderr, 'Calling app()'
try:
r = self.app(environ, start_response)
except:
print >> sys.stderr, 'app() raised exception'
import traceback
print >> sys.stderr, traceback.format_exc()
return None
print >> sys.stderr, 'app() returned:', r
return r
and in the apache error logs I get:
[Mon Feb 10 22:35:52 2014] [error] running django handler...
[Mon Feb 10 22:35:52 2014] [error] django app:
<django.core.handlers.wsgi.WSGIHandler object at 0x7f02881323d0>
[Mon Feb 10 22:35:52 2014] [error] Calling app()
[Mon Feb 10 22:35:52 2014] [error]
/usr/local/lib/python2.7/dist-packages/numpy/oldnumeric/__init__.py:11:
ModuleDeprecationWarning: The oldnumeric module will be dropped in Numpy 1.9
[Mon Feb 10 22:35:52 2014] [error] warnings.warn(_msg,
ModuleDeprecationWarning)
[Mon Feb 10 22:35:52 2014] [error]
and then nothing happens. A few minutes later, I get:
[Mon Feb 10 17:40:21 2014] [info] mod_wsgi (pid=7424): Daemon process
deadlock timer expired, stopping process 'supernova'.
[Mon Feb 10 17:40:21 2014] [info] mod_wsgi (pid=7424): Shutdown requested
'supernova'.
[Mon Feb 10 17:40:26 2014] [info] mod_wsgi (pid=7424): Aborting process
'supernova'.
Error opening file for reading: Permission denied
[Mon Feb 10 22:40:26 2014] [error] [client 128.122.53.236] Premature end of
script headers: wsgi.py
[Mon Feb 10 22:40:26 2014] [info] mod_wsgi (pid=7426): Destroying
interpreters.
[Mon Feb 10 22:40:26 2014] [info] mod_wsgi (pid=7426): Cleanup interpreter
''.
I am using WSGIDaemonProcess. And for what it's worth, I don't see an
apache or mod_wsgi process in 'top' while this is going on.
I get the same behavior using the default embedded-mode mod_wsgi.
Obviously I need to go see if I can figure out what exact change in my code
triggered this, but does anyone have any extra hints on tracking down this
kind of problem?
Thanks,
--dustin
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