Time out errors using uwsgi with ngnix on debian 7 (wheezy)

[Denis Papathanasiou]

I've installed nginx via apt, using the nginx stable pkg as described here:
http://nginx.org/en/linux_packages.html#stable

It works perfectly for serving static files using the default configuration.

Next, I installed uwsgi from source, as described here:
https://pypi.python.org/pypi/uWSGI/1.2.3

When I do the steps in the python quickstart guide --
http://uwsgi-docs.readthedocs.org/en/latest/WSGIquickstart.html -- and open
my browser to localhost:9090, everything works as expected.

When I change the nginx config file to use uwsgi_pass to localhost:9090 as
described here --
http://uwsgi-docs.readthedocs.org/en/latest/WSGIquickstart.html#putting-behind-a-full-webserver--
however, I get time out errors:

> upstream timed out (110: Connection timed out) while reading response
header from upstream

It is as though nginx is *not* passing those requests to the uwsgi process
(which is still running).

Here is the content of server{ } inside the nginx config file:

        location / {
            include uwsgi_params;
            uwsgi_pass localhost:9090;
        }

Any ideas on what the problem might be?
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