(52) Empty reply from server on slow response

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.

Posted at Nginx Forum:
https://forum.nginx.org/read.php?2,267819,267819#msg-267819

Hello!

On Thu, Jun 23, 2016 at 08:02:11AM -0400, ktiniatros wrote:

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 ?

First of all, try looking into nginx error log.


Maxim D.
http://nginx.org/

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