Error: readv() failed (104: Connection reset by peer) while reading upstream

Question

I have facebook apps with flask with nginx and uwsgi. When it receive POST from facebook, it always has error:

readv() failed (104: Connection reset by peer) while reading upstream

But when I access my apps directly (with GET method), it ran smoothly. What I've done:

1. Limit @app.route with POST method only - doesn't work.
2. Add limit in wsgi: uwsgi_buffer_size (in case request from facebook is big), and uwsgi_harakiri (in case uwsgi provide timeout before finish it request) - doesn't work.

I have workaround in django but can't figure out yet how to implement in flask. Could anyone help please?

Answer 1

This is the bug of uwsgi. You can get more from [uWSGI] Several bugs .

The simple solution is that you must read the POST body by wsgi.input, even through POST body is null or you don't need POST params.