Hi Jeff,
> 504's are killing us and we have no clue why we get them
>
> Here's a sample log entry:
>
> Jun 10 17:27:33 localhost haproxy[23508]: 10.126.160.11:37139
> [10/Jun/2015:17:26:03.027] http-in resub-bb-default/njorch0pe16
> 30935/0/1/-1/90937 504 194 - - sH-- 16/14/0/0/0 0/0
> {569760396|297|RESUB|EMAIL|0|9001|0|0|1.0|NJ|60} "POST /somepath
> HTTP/1.1"
Read:
http://cbonte.github.io/haproxy-dconv/configuration-1.5.html#8.5
This is a timeout on the server side. Increase "timeout server".
Lukas