strange attributeerror module object has no attribute exc when using sqlalchemy from a mod_wsgi handle

[alonn]

this is what I got from tailing the mod_wsgi error stack:

[Tue Mar 27 23:14:16 2012] [error] [client 127.0.0.1]     from sqlalchemy import create_engine,String,Unicode,Integer, Column, func,distinct, desc

[Tue Mar 27 23:14:16 2012] [error] [client 127.0.0.1]   File "/path/to/virtualenv/app/data/virtenv/lib/python2.6/site-packages/sqlalchemy/__init__.py", line 10, in <module>

[Tue Mar 27 23:35:50 2012] [error] [client 127.0.0.1] AttributeError: 'module' object has no attribute 'exc'

actually when I run the file directly from python without mod_wsgi the error doesn' t show up.. strange

I'll be glas any help/exprience  with this strange problem? 

[Michael Bayer]

sometimes things like that happen when theres a recursion overflow, though I've never seen it occur at module import time like that, save for a bug we've observed in Jython.

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[Michel Albert]

I have the exact same problem... Did you find a solution yet on your end? 

[Michel Albert]

Upon closer inspection it was an access rights problem. mod_wsgi could not write into it's "egg-cache". 

The following section of the docs explains how to fix this: http://code.google.com/p/modwsgi/wiki/ApplicationIssues#Access_Rights_Of_Apache_User

After that I had to restart the server. Not only touch the WSGI file!