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Beefed up 'If you get a segmentation fault' section in docs/modpython.txt 

git-svn-id: http://code.djangoproject.com/svn/django/trunk@2311 bcc190cf-cafb-0310-a4f2-bffc1f526a37
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Adrian Holovaty 2006-02-16 16:00:32 +00:00
parent c1dded685d
commit e9a1e9fed6
1 changed files with 27 additions and 4 deletions
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@ -202,9 +202,32 @@ read, but it's how mod_python does things.)
If you get a segmentation fault
===============================
If Apache causes a segmentation fault, it's probably because you're running
mod_python and mod_php in the same Apache instance, with MySQL as your database
backend. This is a known mod_python issue, not a Django issue, and there's more
information in the `mod_python FAQ entry`.
If Apache causes a segmentation fault, there are two probable causes, neither
of which has to do with Django itself.
1. It may be because your Python code is importing the "pyexpat" module,
which may conflict with the version embedded in Apache. For full
information, see `Expat Causing Apache Crash`_.
2. It may be because you're running mod_python and mod_php in the same
Apache instance, with MySQL as your database backend. In some cases,
this causes a known mod_python issue due to version conflicts in PHP and
the Python MySQL backend. There's full information in the
`mod_python FAQ entry`_.
If you continue to have problems setting up mod_python, a good thing to do is
get a barebones mod_python site working, without the Django framework. This is
an easy way to isolate mod_python-specific problems. `Getting mod_python Working`_
details this procedure.
The next step should be to edit your test code and add an import of any
Django-specific you're using -- your views, your models, your URLconf, your RSS
configuration, etc. Put these imports in your test handler function and access
your test URL in a browser. If this causes a crash, you've confirmed it's the
importing of Django code that causes the problem. Gradually reduce the set of
imports until it stops crashing, so as to find the specific module that causes
the problem. Drop down further into modules and look into their imports, as
necessary.
.. _Expat Causing Apache Crash: http://www.dscpl.com.au/articles/modpython-006.html
.. _mod_python FAQ entry: http://modpython.org/FAQ/faqw.py?req=show&file=faq02.013.htp
.. _Getting mod_python Working: http://www.dscpl.com.au/articles/modpython-001.html