Fatal Python error: PyEval_AcquireThread

Question

I just put up a django application online and i'm getting this error in my error log

Fatal Python error: PyEval_AcquireThread: NULL new thread state

I have seen a few similar questions online, but they do not explain this error.

Answer 1

The problem can appear if apache mod_wsgi and mod_python are both enabled. Try

sudo a2dismod python
sudo service apache2 restart

Answer 2

This tends to indicate that your mod_wsgi is compiled for a different Python version and/or a different Python installation than the Python virtual environment or Python installation it is trying to use at runtime.

In other words, you are mixing compiled shared library and extension modules from different Python installations. This can cause all sorts of problems.

Go through the checks in:

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

to understand how your mod_wsgi has been built and verify it is what you expect it to be.