Hi,

I have a node.js/express backend with nginx. Everything works fine except one request which gives back (52) Empty reply from server on slow responses ONLY (this request aggregates remote data, so in some very specific scenarios it takes time to complete). By slow, I mean specifically when the response takes more than 4 minutes (node.js still working since I see its log but nginx is already closing the request with the above message).

Anyone has an idea why this is happening ? And what's the proper way to debug this kind of issues ?

Thank you in advance for your time.