Why is mod_wsgi not able to write data? IOError: failed to write data

Question

What could be causing this error:

$ sudo tail -n 100 /var/log/apache2/error.log\'

[Wed Dec 29 15:20:03 2010] [error] [client 220.181.108.181] mod_wsg         


        

Answer 1

I have the same problem in an application that uses a lot of AJAX calls (mod_wsgi 3.3). Is there any known solution for this? I thought about just ignoring the exception, but that is normally not a very good idea.

UPDATE

Actually, this can be due to several things, but the most probable cause is that you are using the write callback instead of yielding your output.

I believe this will help:

http://groups.google.com/group/modwsgi/browse_thread/thread/c9cc1307bc10cfff