[mod_python] Problems with ZODB / modpython

Thiago Comicio thiagocomicio at gmail.com
Thu Jan 18 06:20:21 EST 2007

On 1/17/07, Graham Dumpleton <grahamd at dscpl.com.au> wrote:
> Thiago Comicio wrote ..
> > Hi,
> >
> > I'm trying to install a program that needs mod_python and ZODB. The
> > program is not running, so I tried to connect to the database through
> > this script:
> >
> > from ZODB import FileStorage, DB
> >
> > def index(req, **params):
> >         storage = FileStorage.FileStorage('mydatabase.fs')
> >         db = DB(storage)
> >         connection = db.open()
> >         root = connection.root()
> >         return TestPage().getHTML()
> >
> > And I received the error below.
> > Does anybody know how to fix it?
> A couple of things to be aware of.
> 1. The Apache web server generally runs as a special user and thus that user
> must have write access to the directory where you are wanting to create the
> database.
> 2. The current working directory is normally '/' for the Apache processes and
> thus if you do not specify an absolute path to where you want to store the
> database, it will try and store it in '/' where you are unlikely to have permissions
> to write. You should not change the working directory as if every handler did
> that they would all interfere with each other.
> Graham

Thanks Graham, this solved my initial problem, now I have another.

I created a simple script to run when I boot my system.

#main part of the script


start() {
        echo -n $"Starting $prog1: "
        $python $zope -C $zopeconf &

I put a symbolic link at /etc/rc5.d with the name S50myscript and a
symbolink link to http like S85http.
When I try to access a page that needs ZEO I receive the error below,
that disappears when I restart apache.
How can I fix this new problem?




Mod_python error: "PythonHandler mod_python.publisher"

Traceback (most recent call last):

  File "/usr/lib/python2.4/site-packages/mod_python/apache.py", line
299, in HandlerDispatch
    result = object(req)

  File "/usr/lib/python2.4/site-packages/mod_python/publisher.py",
line 204, in handler
    module = page_cache[req]

  File "/usr/lib/python2.4/site-packages/mod_python/cache.py", line
82, in __getitem__
    return self._checkitem(name)[2]

  File "/usr/lib/python2.4/site-packages/mod_python/cache.py", line
124, in _checkitem
    value = self.build(key, name, opened, entry)

  File "/usr/lib/python2.4/site-packages/mod_python/publisher.py",
line 77, in build
    return ModuleCache.build(self, key, req, opened, entry)

  File "/usr/lib/python2.4/site-packages/mod_python/cache.py", line
371, in build
    exec opened in module.__dict__

  File "/var/www/html/indico/index.py", line 1, in ?
    import MaKaC.webinterface.rh.welcome as welcome

  File "/usr/lib/python2.4/site-packages/MaKaC/webinterface/rh/welcome.py",
line 1, in ?
    import MaKaC.webinterface.rh.base as base

  File "/usr/lib/python2.4/site-packages/MaKaC/webinterface/rh/base.py",
line 13, in ?
    from ZODB.POSException import ConflictError

ImportError: No module named ZODB.POSException

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