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Ville Silventoinen
vsi at ebi.ac.uk
Fri Jun 17 12:37:58 EDT 2005
Hi, I found some clues from here: http://www.modpython.org/pipermail/mod_python/2004-May/015569.html To put it shortly: you need to make sure Python and mod_python are using the same expat library. Python 2.4 includes with expat-1.95.2, mod_python (or is it Apache, I'm not 100% sure) compiles with system expat (1.95.5 in my Linux OS), which creates the segfault problem. I have just installed expat-1.95.8 and I'm in the process of recompiling Python-2.4 and mod_python. In my case I need to install expat and Python in a non-standard path, which is mounted over NFS on several machines. I'll write short instructions if I get it working (next week)! Cheers, Ville On Fri, 17 Jun 2005, dharana wrote: > I too am having problems related to xml but from another package: 4Suite, > which I believe is also based on xml.sax and expat. from Ft.Xml import > MarkupWriter works if it's called from cmdline mode but it segfaults if > called from mod_python. > > > Ville Silventoinen wrote: >> Hi, >> >> looks like the problem is with xml.sax and expat. I found other >> mails about the same problem. >> >> Cheers, >> Ville >> >> >> On Fri, 17 Jun 2005, Ville Silventoinen wrote: >> >>> Hi, >>> >>> I've been looking for something more extensive than ConfigParser >>> for my configuration files, so I tried ZConfig 2.3. I wrote a small >>> test module that uses ZConfig, which works ok. When I tried to use >>> the same module with mod_python, I get a Segmentation fault. >>> >>> Has anyone had similar problems using mod_python with ZConfig 2.x? >>> >>> My test handler looks like this: >>> >>> from mod_python import apache >>> import ZConfig >>> >>> SCHEMA_FILE = '/homes/vsi/src/spylib/lib/Spy/spyschema.xml' >>> CONFIG_FILE = '/homes/vsi/src/spylib/lib/Spy/spy.conf' >>> >>> def handler(req): >>> try: >>> req.write("Trying to load configuration...\n"); >>> schema = ZConfig.loadSchema(SCHEMA_FILE) >>> config, handler = ZConfig.loadConfig(schema, CONFIG_FILE) >>> req.write("Configuration loaded\n") >>> except Exception, e: >>> req.write("Failed to load configuration:\n%s" % str(e)) >>> >>> return apache.OK >>> >>> When called, I see "Trying to load configuration..." and then nothing. >>> In Apache error_log I get: >>> >>> [Fri Jun 17 13:09:31 2005] [notice] mod_python: (Re)importing module >>> 'testMPConfig' >>> [Fri Jun 17 13:09:33 2005] [notice] child pid 26452 exit signal >>> Segmentation fault (11) >>> >>> This happens every time I call the handler. >>> >>> My configuration: >>> >>> LoadModule python_module /ebi/www/main/modules/mod_python.so >>> >>> <Directory /ebi/www/main/cgi-bin/vsi/test> >>> AddHandler mod_python .py >>> PythonHandler testMPConfig >>> PythonAutoReload On >>> PythonDebug On >>> </Directory> >>> >>> My environment: >>> >>> Apache-2.0.54 >>> Python-2.4 >>> mod_python-3.1.3 >>> ZConfig 2.3 (tried 2.2 as well) >>> Red Hat Linux release 9 (Shrike) 2.4.20-8rlx4smp >>> >>> Any help would be appreciated. I've tried commenting lines out of the >>> handler, looks like the problem happens with "loadSchema". I also tried >>> to use "loadSchemaFile", but it didn't help. >>> >>> On the same note, what is the recommended way to handle configuration >>> with Python? I'm fairly new to Python. I'd like to have a configuration >>> that is reloaded automatically when modified, validation rules, sections >>> and proper values (so that integer strings become ints/longs in the >>> configuration object, keys with multiple values become lists, etc.) >>> Is the best way to write a Python module that contains the configuration? >>> This would skip parsing phase and let mod_python reload the module when >>> it's been modified. >>> >>> Thanks, >>> Ville >>> >>> _______________________________________________ >>> Mod_python mailing list >>> Mod_python at modpython.org >>> http://mailman.modpython.org/mailman/listinfo/mod_python >>> >> _______________________________________________ >> Mod_python mailing list >> Mod_python at modpython.org >> http://mailman.modpython.org/mailman/listinfo/mod_python >> >> >> > > -- > dharana > >
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