[mod_python] undefined symbol: PyThread_acquire_lock

David AnguloJunk davidangulojunk at gmail.com
Tue Jul 8 11:57:17 EDT 2008


Re: apache startup.  I sent this earlier, but accidently cut off the
CC for the list, so I'll repost it

===========
Does this mean that the mod_python hasn't been installed correctly:

   [/home/x/public_html/conf]# python
   Python 2.3.4 (#1, Dec 11 2007, 05:27:57)
   [GCC 3.4.6 20060404 (Red Hat 3.4.6-9)] on linux2
   Type "help", "copyright", "credits" or "license" for more information.
   >>> import mod_python.psp

   Traceback (most recent call last):
     File "<stdin>", line 1, in ?
   ImportError: No module named mod_python.psp
   >


Also, I found this in the apache log:

   [Thu Jul  3 15:43:35 2008] [notice] Apache/1.3.39 (Unix)
   PHP/5.2.5 mod_python/2.7.11 Python/2.5.1
   mod_auth_passthrough/1.8 mod_bwlimited/1.4
   mod_log_bytes/1.2 mod_gzip/1.3.26.1a FrontPage/5.0.2.2635
   DAV/1.0.3 mod_ssl/2.8.30 OpenSSL/0.9.7a configured --
   resuming normal operations
=========


Re: Python shared library.  No, a shared library isn't being used:

x at y [~]# ldd mod_python.so
ldd: ./mod_python.so: No such file or directory
x at y [~]# ls -las mod_pyhthon.so
/bin/ls: mod_pyhthon.so: No such file or directory


but that's going to depend on which directory I'm in when I run it so:

x at y [~]# locate mod_python.so
/usr/local/apache/libexec/mod_python.so
/usr/src/mod_python-2.7.11/src/mod_python.so
x at y [~]# ls -las /usr/local/apache/libexec/mod_python.so
3951 -rwxr-xr-x  1 root root 4028236 Jan 16 14:48
/usr/local/apache/libexec/mod_python.so*





On 7/7/08, Graham Dumpleton <graham.dumpleton at gmail.com> wrote:
> What does Apache startup message say about mod_python version:
>
> [Tue Feb 01 16:08:21 2005] [notice] Apache/2.0.51 (Unix)
>   mod_python/3.1.3 Python/2.3 configured -- resuming normal operations
>
> Is a Python shared library being used. Ie., what do you get if do:
>
>   ldd mod_python.so
>
> and:
>
>   ls -las mod_pyhthon.so
>
> Graham
>
> 2008/7/8 David Angulo Junk <DavidAnguloJunk at gmail.com>:
>> Thanks again.
>>
>> The installations are at:
>>
>> /usr/bin/python2.3
>> /usr/local/bin/python2.4
>> /usr/local/bin/python2.5
>>
>> and the libraries are at:
>>
>> /usr/lib/python2.3/
>> /usr/local/lib/python2.4/
>> /usr/local/lib/python2.5/
>>
>> No, I don't see any installation in both places.
>>
>>
>> So, from what you said below, I take it I should uninstall some versions
>> and
>> ensure they're all installed in a single location???
>>
>> Thanks.
>>
>> Dave
>>
>>
>>
>> On Thu, Jul 3, 2008 at 7:53 PM, Graham Dumpleton
>> <graham.dumpleton at gmail.com> wrote:
>>>
>>> Please keep followups on list by using reply-all.
>>>
>>> 2008/7/4 David AnguloJunk <davidangulojunk at gmail.com>:
>>> > I walked into an installation done by someone else.  There are three
>>> > pythongs installed (2.3, 2.4, and 2.5).  I do not see anything setting
>>> > paths
>>> > to any of the three of these in either the httpd.conf  nor in the
>>> > environment variables.  Where are the "python paths" set?  I am
>>> > assuming
>>> > that mod_python just has its path set into it at install time??
>>>
>>> But where are the different versions installed? Are there some in /usr
>>> and some in /usr/local and is any version appearing in both locations.
>>>
>>> How mod_python finds Python installation is a bit convoluted, albeit
>>> not mod_python's fault, but just how Python does it. Effectively, the
>>> version of Python is known by mod_python by virtue of library being
>>> linked in, but run time directories for Python found at run time,
>>> which can cause problems if you have Python installations in multiple
>>> different root directories.
>>>
>>> Graham
>>>
>>> > Thanks for your help.
>>> >
>>> > Dave
>>> >
>>> > On Tue, Jul 1, 2008 at 9:32 PM, Graham Dumpleton
>>> > <graham.dumpleton at gmail.com> wrote:
>>> >>
>>> >> Did you have to heavily fiddle with Python paths to get mod_python to
>>> >> use the installation of Python you wanted it to use? Looks a bit like
>>> >> you are trying to use a Python installation different to what
>>> >> mod_python was compiled for.
>>> >>
>>> >> Graham
>>> >>
>>> >> 2008/7/2 David AnguloJunk <davidangulojunk at gmail.com>:
>>> >> > Could someone help me please?  In my code, I'm doing a:
>>> >> >
>>> >> >     import zlib
>>> >> >
>>> >> > and I get this:
>>> >> >
>>> >> >    Mod_python error: "PythonHandler www"
>>> >> >
>>> >> >    Traceback (most recent call last):
>>> >> >
>>> >> >      File
>>> >> > "/usr/local/lib/python2.5/site-packages/mod_python/apache.py",
>>> >> > line 181, in Dispatch
>>> >> >
>>> >> >        module = import_module(module_name, _req)
>>> >> >      File
>>> >> > "/usr/local/lib/python2.5/site-packages/mod_python/apache.py",
>>> >> > line 335, in import_module
>>> >> >        module = imp.load_module(mname, f, p, d)
>>> >> >      File "/home/x/public_html/www/modules/www.py", line 8, in
>>> >> > <module>
>>> >> >
>>> >> >        import google_sitemap
>>> >> >      File "/home/x/public_html/www/modules/google_sitemap.py",
>>> >> > line 2,
>>> >> > in <module>
>>> >> >        import gzip
>>> >> >      File "/usr/local/lib/python2.5/gzip.py", line 9, in <module>
>>> >> >
>>> >> >        import zlib
>>> >> >    ImportError: /usr/local/lib/python2.5/lib-dynload/zlib.so:
>>> >> > undefined
>>> >> > symbol: PyThread_acquire_lock
>>> >> >
>>> >> > Thanks
>>> >> >
>>> >> > _______________________________________________
>>> >> > Mod_python mailing list
>>> >> > Mod_python at modpython.org
>>> >> > http://mailman.modpython.org/mailman/listinfo/mod_python
>>> >> >
>>> >> >
>>> >
>>> >
>>
>>
>


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