[mod_python] Session unable to acquire mutex lock?

Russell Lear RussLear314 at yahoo.com
Sat Dec 27 19:44:55 EST 2003


I'm a newbie to mod_python so forgive me if this is a terribly obvious
question (I've looked through the archives without much success).

I'm trying to use sessions.  Right now I have a slightly modified version
of mptest.py as follows (it doesn't make sense, but it does show my

    from mod_python import apache, Session
    import sys

    def handler(req):
        req.content_type = 'text/plain'
        sess = Session.Session(req)
        req.write("Hello World!")
        return apache.OK

When I run it, I see:

     Mod_python error: "PythonHandler mptest"

     Traceback (most recent call last):

       File "/usr/lib/python2.3/site-packages/mod_python/apache.py", line 338, in HandlerDispatch
         result = object(req)

       File "/srv/www/htdocs/test/mptest.py", line 7, in handler
         sess = Session.Session(req)

       File "/usr/lib/python2.3/site-packages/mod_python/Session.py", line 411, in Session

       File "/usr/lib/python2.3/site-packages/mod_python/Session.py", line 316, in __init__
         secret=secret, timeout=timeout)

       File "/usr/lib/python2.3/site-packages/mod_python/Session.py", line 170, in __init__
         self.lock()                 # lock new sid

       File "/usr/lib/python2.3/site-packages/mod_python/Session.py", line 241, in lock
         _apache._global_lock(self._req.server, self._sid)

     ValueError: Failed to acquire global mutex lock

What am I doing wrong here?!

Thanks for any suggestions,


I'm running on SuSE 9.0 Linux.

Python reports version "Python 2.3+ (#1, Sep 23 2003, 23:07:16)".

>From the Apache error page: 
    Apache/2.0.48 (Linux/SuSE), 

The only glitch I had in building mod_python was that I needed to specify 
    ./configure --with-apxs=/usr/sbin/apxs2

rather than just refering to apxs.

My apache configuration is (from the tutorial):
<Directory /srv/www/htdocs/test> 
  AddHandler python-program .py
  PythonHandler mptest 
  PythonDebug On 

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