Validate where Python library coming from using ldd. Seee section
about Python shared library in:

  http://code.google.com/p/modwsgi/wiki/CheckingYourInstallation

What options did you use to 'configure' for your Python installation?
Did you use the --enable-shared option?

Graham

On Tuesday, November 23, 2010, Guddu <[email protected]> wrote:
> All,
>
> When accessing my Django App from Web Browser, the following messages
> appear in the Apache Logs
>
> [Tue Nov 23 04:36:42 2010] [notice] Apache/2.2.17 (Unix) mod_wsgi/3.3
> Python/2.6.6 configured -- resuming normal operations
> [Tue Nov 23 04:41:00 2010] [error] [client 108.10.0.191] mod_wsgi
> (pid=942094): Target WSGI script '/u01/home/apli/wm/app/gdd/pyserver/
> apache/django.wsgi' cannot be loaded as Python module.
> [Tue Nov 23 04:41:00 2010] [error] [client 108.10.0.191] mod_wsgi
> (pid=942094): Exception occurred processing WSGI script '/u01/home/
> apli/wm/app/gdd/pyserver/apache/django.wsgi'.
> [Tue Nov 23 04:41:00 2010] [error] [client 108.10.0.191] Traceback
> (most recent call last):
> [Tue Nov 23 04:41:00 2010] [error] [client 108.10.0.191]   File "/u01/
> home/apli/wm/app/gdd/pyserver/apache/django.wsgi", line 19, in
> <module>
> [Tue Nov 23 04:41:00 2010] [error] [client 108.10.0.191]     import
> django.core.handlers.wsgi
> [Tue Nov 23 04:41:00 2010] [error] [client 108.10.0.191]   File "/usr/
> local/lib/python2.6/site-packages/django/core/handlers/wsgi.py", line
> 1, in <module>
> [Tue Nov 23 04:41:00 2010] [error] [client 108.10.0.191]     from
> threading import Lock
> [Tue Nov 23 04:41:00 2010] [error] [client 108.10.0.191]   File "/usr/
> local/lib/python2.6/threading.py", line 13, in <module>
> [Tue Nov 23 04:41:00 2010] [error] [client 108.10.0.191]     from
> functools import wraps
> [Tue Nov 23 04:41:00 2010] [error] [client 108.10.0.191]   File "/usr/
> local/lib/python2.6/functools.py", line 10, in <module>
> [Tue Nov 23 04:41:00 2010] [error] [client 108.10.0.191]     from
> _functools import partial, reduce
> [Tue Nov 23 04:41:00 2010] [error] [client 108.10.0.191] ImportError:
> rtld: 0712-001 Symbol PyArg_UnpackTuple was referenced
> [Tue Nov 23 04:41:00 2010] [error] [client 108.10.0.191]       from
> module /usr/local/lib/python2.6/lib-dynload/_functools.so(), but a
> runtime definition
> [Tue Nov 23 04:41:00 2010] [error] [client 108.10.0.191]       of the
> symbol was not found.
> [Tue Nov 23 04:41:00 2010] [error] [client 108.10.0.191] rtld:
> 0712-001 Symbol PyCallable_Check was referenced
> [Tue Nov 23 04:41:00 2010] [error] [client 108.10.0.191]       from
> module /usr/local/lib/python2.6/lib-dynload/_functools.so(), but a
> runtime definition
> [Tue Nov 23 04:41:00 2010] [error] [client 108.10.0.191]       of the
> symbol was not found.
> [Tue Nov 23 04:41:00 2010] [error] [client 108.10.0.191] rtld:
> 0712-001 Symbol PyDict_Copy was referenced
> [Tue Nov 23 04:41:00 2010] [error] [client 108.10.0.191]       from
> module /usr/local/lib/python2.6/lib-dynload/_functools.so(), but a
> runtime definition
> [Tue Nov 23 04:41:00 2010] [error] [client 108.10.0.191]       of the
> symbol was not found.
> [Tue Nov 23 04:41:00 2010] [error] [client 108.10.0.191] rtld:
> 0712-001 Symbol PyDict_Merge was referenced
> [Tue Nov 23 04:41:00 2010] [error] [client 108.10.0.191]       from
> module /usr/local/lib/python2.6/lib-dynload/_functools.so(), but a
> runtime definition
> [Tue Nov 23 04:41:00 2010] [error] [client 108.10.0.191]       of the
> symbol was not found.
> [Tue Nov 23 04:41:00 2010] [error] [client 108.10.0.191] rtld:
> 0712-001 Symbol PyDict_New was referenced
> [Tue Nov 23 04:41:00 2010] [error] [client 108.10.0.191]       from
> module /usr/local/lib/python2.6/lib-dynload/_functools.so(), but a
> runtime definition
> [Tue Nov 23 04:41:00 2010] [error] [client 108.10.0.191]       of the
> symbol was not found.
> [Tue Nov 23 04:41:00 2010] [error] [client 108.10.0.191] rtld:
> 0712-001 Symbol PyErr_Occurred was referenced
> [Tue Nov 23 04:41:00 2010] [error] [client 108.10.0.191]       from
> module /usr/local/lib/python2.6/lib-dynload/_functools.so(), but a
> runtime definition
> [Tue Nov 23 04:41:00 2010] [error] [client 108.10.0.191]       of the
> symbol was not found.
> [Tue Nov 23 04:41:00 2010] [error] [client 108.10.0.191] rtld:
> 0712-001 Symbol PyErr_SetString was referenced
> [Tue Nov 23 04:41:00 2010] [error] [client 108.10.0.191]       from
> module /usr/local/lib/python2.6/lib-dynload/_functools.so(), but a
> runtime definition
> [Tue Nov 23 04:41:00 2010] [error] [client 108.10.0.191]       of the
> symbol was not found.
> [Tue Nov 23 04:41:00 2010] [error] [client 108.10.0.191] \t0509-021
> Additional errors occurred but are not reported.
>
> When i start python shell and execute the same import statements as in
> the logs above in the same order, I don't get those errors.
>
> root [zibal]% python
> Python 2.6.6 (r266:84292, Nov 17 2010, 15:59:10)
> [GCC 4.2.4] on aix5
> Type "help", "copyright", "credits" or "license" for more information.
>>>> import django.core.handlers.wsgi
>>>> from threading import Lock
>>>> from functools import wraps
>>>> from _functools import partial, reduce
>>>>
>
> I don't have any mod_python module installed. The only module being
> loaded via httpd.conf LoadModule directive is mod_wsgi
>
> Looking at the logs, the Python libraries being picked are from /usr/
> local/lib/python2.6 which is my correct and the only version of Python
> on this machine.
>
> I have looked at these pages but could not find a solution
> http://code.google.com/p/modwsgi/wiki/InstallationIssues
> http://code.google.com/p/modwsgi/wiki/ConfigurationIssues
> http://code.google.com/p/modwsgi/wiki/ApplicationIssues
>
> Please let me know if there is anything I could try to solve this
> problem.
>
> Regards,
> Anurag
>
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