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I'm using Macports on OS X 10.6 to manage Apache, PHP, and Python. I've never had any problems and the setup works great. However, when I add mod_wsgi to the mix Apache immediately crashes with a segmentation fault. Here's what's installed via macports:

  • apache2 @2.2.17_0+preforkmpm
  • php5 @5.3.3_1+apache2+pear
  • python27 @2.7.1_0
  • mod_wsgi @3.2_0+python27

After installing mod_wsgi, adding it to httpd.conf, and restarting apache, it seg faults every time. I do not have mod_python installed. If I remove mod_php by commenting it out of httpd.conf, apache runs fine. So it's clearly the mix of mod_wsgi and mod_php that's causing a crash. Any ideas on what's wrong? How can I avoid the seg fault when both are running together?

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A common cause is multiple different versions of a library being used by different modules. Use otool -L against the various dynamic libraries to see which have the conflict, then rebuild appropriately.

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  • /opt/local/Library/Frameworks/Python.framework/Versions/2.7/Python (compatibility version 2.7.0, current version 2.7.0); /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 125.2.1); /System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation (compatibility version 150.0.0, current version 550.42.0) Is there anything wrong here? I have no idea what it should look like.
    – Matt S
    Dec 10, 2010 at 16:02
  • Thanks! Compared the versions for libraries that the modules had in common. Found one that differed, recompiled PHP, and all is well.
    – Matt S
    Dec 10, 2010 at 16:28

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