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Haproxy Bad Gateway 502

Therefore, I use HAProxy in front of Jetty servlets. The goal at the moment is just proof of concept and workload and stress testing once everything is set up. However, I have a problem setting up haproxy. I know that this is not a problem with my application, because nginx (tengine) works for me, and everything works correctly. So it should be something with a haproxy configuration, or just the way haproxy works, not suitable for my needs.

So what my client is trying to do is connect to haproxy using two different connections and keep them open. 1. Connect to the streaming mode to download. 2. Connect to normal mode and set the download channel.

This is what my haproxy.conf file looks like:

global
log /dev/log    local0
log /dev/log    local1 notice
chroot /var/lib/haproxy
stats socket /run/haproxy/admin.sock mode 660 level admin
stats timeout 30s
user haproxy
group haproxy
daemon

# Default SSL material locations
# ca-base /etc/ssl/certs
# crt-base /etc/ssl/private

# Default ciphers to use on SSL-enabled listening sockets.
# For more information, see ciphers(1SSL).
ssl-default-bind-ciphers kEECDH+aRSA+AES:kRSA+AES:+AES256:RC4-SHA:!kEDH:!LOW:!EXP:!MD5:!aNULL:!eNULL
maxconn 2048

defaults
log global
mode    http
option forwardfor
option http-server-close
option  httplog
option  dontlognull
timeout connect 5000
timeout client  50000
timeout server  50000
errorfile 400 /etc/haproxy/errors/400.http
errorfile 403 /etc/haproxy/errors/403.http
errorfile 408 /etc/haproxy/errors/408.http
errorfile 500 /etc/haproxy/errors/500.http
errorfile 502 /etc/haproxy/errors/502.http
errorfile 503 /etc/haproxy/errors/503.http
errorfile 504 /etc/haproxy/errors/504.http
stats enable
stats uri /stats
stats realm Haproxy\ Statistics
stats auth user:password

frontend www-http
   bind *:80
   reqadd X-Forwarded-Proto:\ http
   default_backend www-backend

frontend www-https
   bind *:443 ssl crt /etc/haproxy/server.pem
   reqadd X-Forwarded-Proto:\ https
   default_backend www-backend

backend www-backend
    redirect scheme https if !{ ssl_fc }
    server www-1 localhost:8080 check maxconn 2048

443:

Sep 17 11:10:18 xxxxx-pc haproxy [15993]: 127.0.0.1:32875 [17/Sep/2014: 11:10: 18.464] www- https ~ www-backend/www-1 0/0/0/-1/1 502 212 - - PH-- 0/0/0/0/0 0/0 "GET/test HTTP/1.1"

, ? ?

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