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Graham Dumpleton
grahamd at dscpl.com.au
Tue Sep 26 20:51:50 EDT 2006
Read: http://www.dscpl.com.au/wiki/ModPython/Articles/ExpatCausingApacheCrash This will answer all your questions and tell you what you need to do. Graham Siddhartha Azad wrote .. > Hi, > I have mod_python 3.2.10 built with apache 2.2.3 on RH > Linux. All was working fine for me until I changed my > directory structure (and hence the location of the > python modules). After doing so I apache started > seg-faulting. I debugged with gdb -X and the > stacktrace points (as I suspected) to some > module-loading code that eventually crashes in some > pyexpat module due to a null string. > > When I change my directory structure to what it was > before, everything works perfectly. > > 1. The directory structure that works: > > /dev/www/xyz.py > /dev/www/modules/*.py > > When I invoke xyz.py from the browser (xyz.py imports > modules from "modules.py") everything works fine (i.e. > when the modules sub-directory is under within the > same parent directory as xyz.py. > > > 2. The directory structure that doesn't work: > > /dev/www/xyz.py > /dev/modules/*.py > > > Notice that the modules are no longer under the "www" > directory. Also, this only happens when my PYTHONPATH > actually has the "modules" directory (otherwise of > course I get an error from xyz.py that the import of > the modules failed). > Please help, I have been trying to fix this for 2 days > now and cannot find any references anyplace else. > The output from the apache error log and some walkback > from "gdb" follow. > Thanks, Sid. > > APACHE ERROR LOG > ---------------- > > [Tue Sep 26 20:12:47 2006] [notice] mod_python: > (Re)importing module 'mod_python.publisher' > [Tue Sep 26 20:12:47 2006] [notice] [client 127.0.0.1] > Publisher loading page /home/sid/dev/www/xyz.py > [Tue Sep 26 20:12:48 2006] [notice] child pid 32091 > exit signal Segmentation fault (11) > > > WALKBACK FROM DEBUGGER > ---------------------- > > > #0 0x40167892 in PyString_FromString (str=0x0) at > Objects/stringobject.c:106 > #1 0x401b8373 in PyModule_AddStringConstant > (m=0x4081e0ec, > name=0x4092f6ba "XML_ERROR_UNBOUND_PREFIX", > value=0x0) at > Python/modsupport.c:531 > #2 0x40913fa1 in initpyexpat () at > /usr/python-2.4.2/Python-2.4.2/Modules/pyexpat.c:1970 > #3 0x401b2bad in _PyImport_LoadDynamicModule > (name=0xbfffadfc "pyexpat", > pathname=0xbfffa960 > "/usr/local/lib/python2.4/lib-dynload/pyexpat.so", > fp=0x8253090) > at Python/importdl.c:53 > #4 0x401af90d in load_module (name=0xbfffadfc > "pyexpat", fp=0x8253090, > buf=0xbfffa960 > "/usr/local/lib/python2.4/lib-dynload/pyexpat.so", > type=3, loader=0x1b) > at Python/import.c:1677 > #5 0x401b0615 in import_submodule (mod=0x40208de0, > subname=0xbfffadfc > "pyexpat", > fullname=0xbfffadfc "pyexpat") at > Python/import.c:2262 > > > _______________________________________________ > Mod_python mailing list > Mod_python at modpython.org > http://mailman.modpython.org/mailman/listinfo/mod_python
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