Michael Fischer <[email protected]> wrote:
> We have an nginx 1.6.2 proxy in front of a Unicorn 4.8.3 server that
> is frequently reporting the following error:
>
> 2015/03/24 01:46:01 [error] 11217#0: *872231 readv() failed (104:
> Connection reset by peer) while reading upstream
>
> The interesting things are:
>
> 1) The upstream is a Unix domain socket (to which Unicorn is bound)
> 2) Unicorn isn't reporting that a child died in the error log (and I
> verified their lifetimes with ps(1))
>
> Any hints as to what we should look for?
What changed recently with your setup?
Which OS/kernel version + vendor version?
Since you've been around a while, I take it this is only a recent issue?
Can you setup a test instance on a different nginx port/unicorn socket
and with a config.ru such as:
------------------------- 8< ----------------------
run(lambda do |env|
$stderr.write("#$$ starting at #{Time.now}\n")
# be sure to configure your unicorn timeout
sleep
# should not return, wait for unicorn to kill
end)
----------------------------------------------------
And hitting nginx with a single test request to reproduce the issue.
And see if it happens on the same/different hosts where you notice the
problem.
