I have an application behind nginx (Rails on Unicorn if it matters)
listens on a UNIX socket.
It all works nice, especially when load is low. When there is some load
the server though (say 70%), I randomly(?) get a bunch of 502 responses
usually in batches.
Thus the question: when (under what conditions) does nginx send a 502
Thanks in advance,
PS: The app’s worker processes do not seem to be irresponsive, slow,
for IO or anything else I have been able to identify as a possible
Thus I want to understand more the nginx side so as to find the root
– which I believe is on the other side (or some config tweak needed
Posted at Nginx Forum: