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[lgm <question231890@xxxxxxxxxxxxxxxxxxxxx>]

Question #231890 on ladon changed:
https://answers.launchpad.net/ladon/+question/231890

    Status: Answered => Open

lgm is still having a problem:
ok, so i have checked and continue to have very weird results. on one
machine the ladon page that provide data about services, never appears,
and load indefinitely. If i asked for soap contract, indefinitely
wiating also.

i thought that the two systems where exactly configured on the same
basis, but it looks like there is a small difference. See below the line
about Mutex when lauching Apache2.

so i have added a timer output at the end of MyWs.py script, as it looks
like on one machine it do not end. And a function example()  just to do
process test data. Module 3, do some import of two other modules needed
and that also contains some Ladonized objects.

	import datetime
	a = datetime.datetime.now()
	myWs = MyWs()
	b = datetime.datetime.now()
	print("Module 3 (MyWS): loaded: %s." % (b-a))

i can test it with python, on the machine where it works:

$ python
Python 2.6.6 (r266:84292, Dec 27 2010, 00:02:40)
[GCC 4.4.5] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import MyWS
Module 1: loaded: 0:00:00.035944.
Features for module 2: loaded: 0:00:04.999658.
Module 2: loaded: 0:00:06.887894
Module 3 (MyWS): loaded: 0:00:00.077702.
>>> MyWS.example()
... # ok everything fine

on the machine that hangs:

$ python
Python 2.6.6 (r266:84292, Dec 27 2010, 00:02:40)
[GCC 4.4.5] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import MyWS
Module 1: loaded: 0:00:00.027162.
Features for module 2: loaded: 0:00:02.794142.
Module 2: loaded: 0:00:03.879293
Module 3 (MyWS): loaded: 0:00:00.054390.
>>> MyWS.example()
... # ok, everything is fine here too... so this not directly a python problem

but when querying from Apache/Ladon, i can see inside my apache log on
the machine that never reply:

$ service apache2 start

=>

$ tail -f /var/log/apache2/error.log

[Mon Jul 08 14:07:14 2013] [notice] Apache/2.2.16 (Debian) mod_wsgi/3.3 Python/2.6.6 configured -- resuming normal operations
[Mon Jul 08 14:07:18 2013] [error] [client xxx.xxx.xxx.xxx] File does not exist: /var/www/taln/favicon.ico
[Mon Jul 08 14:07:34 2013] [error] Module 1: loaded: 0:00:00.035079.
[Mon Jul 08 14:07:37 2013] [error] Features for module 2: 0:00:02.988823.
[Mon Jul 08 14:07:38 2013] [error] Module 2: 0:00:03.273715

... # here nothing happen in the web page, whatever i wait, nothing appears inside 
and then nothing never come after, while i should see: Module 3 (MyWS): loaded: <timing>.
the browser is waiting endlessly for loading the page.

if i decide to do "service apache2 stop" i then get :

[Mon Jul 08 14:11:44 2013] [warn] child process 10497 still did not exit, sending a SIGTERM
[Mon Jul 08 14:11:46 2013] [warn] child process 10497 still did not exit, sending a SIGTERM
[Mon Jul 08 14:11:48 2013] [warn] child process 10497 still did not exit, sending a SIGTERM
[Mon Jul 08 14:11:50 2013] [error] child process 10497 still did not exit, sending a SIGKILL
[Mon Jul 08 14:11:51 2013] [notice] caught SIGTERM, shutting down

so ti looks like something is lost somewhere, but why ? any clue of
something wrong?

on the machine, where it works, everything went fine see below, and i
get the expected Module 3 (MyWS): loaded: <timing>. Ladon webservice
worked and so on...

BTW, there is also something about Mutex, i do not know what it is, and
if this could explain the problem. I do not know where it comes from as
i think everything where installed the same way (i'm now trying to
understand this)

[Mon Jul 08 11:40:44 2013] [error] python_init: Python version mismatch, expected '2.6.5+', found '2.6.6'.
[Mon Jul 08 11:40:44 2013] [error] python_init: Python executable found '/usr/bin/python'.
[Mon Jul 08 11:40:44 2013] [error] python_init: Python path being used '/usr/lib/python2.6/:/usr/lib/python2.6/plat-linux2:/usr/lib/python2.6/lib-tk:/usr/lib/python2.6/lib-old:/usr/lib/python2.6/lib-dynload'.
[Mon Jul 08 11:40:44 2013] [notice] mod_python: Creating 8 session mutexes based on 6 max processes and 25 max threads.
[Mon Jul 08 11:40:44 2013] [notice] mod_python: using mutex_directory /tmp
[Mon Jul 08 11:40:44 2013] [notice] Apache/2.2.16 (Debian) mod_python/3.3.1 Python/2.6.6 mod_wsgi/3.3 mod_perl/2.0.4 Perl/v5.10.1 configured -- resuming normal operations
[Mon Jul 08 11:41:01 2013] [error] Module 1: loaded: 0:00:00.034712.
[Mon Jul 08 11:41:06 2013] [error] Features for module 2: loaded: 0:00:04.782057.
[Mon Jul 08 11:41:07 2013] [error] Module 2: loaded: 0:00:05.798397
[Mon Jul 08 11:41:08 2013] [error] Module 3 (MyWS): loaded: 0:00:00.081700.
[Mon Jul 08 11:41:08 2013] [error] [client xxx.xxx.xxx.xxx] File does not exist: /var/www/mysite/favicon.ico

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