Haproxy is getting NOSRV with SC Error - Version 2.0.6 2019/09/13

Help!
1

Hi All,

I use the below config in haproxy 2.0.6 2019/09/13 version, but intermittently my logs showing the NOSRV with SC code… could you please help ?

Config:

global
  daemon
  pidfile /var/run/haproxy.pid
  maxconn 120000
  log 127.0.0.1 local1 info
  log-send-hostname
  nbproc 4
  cpu-map 1 0
  cpu-map 2 1
  cpu-map 3 2
  cpu-map 4 3
  group haproxy
  user haproxy
frontend myservice_tls 
    bind :::443 ssl crt <cert location>
    default_backend myservice.AuthenticatedSSL
backend  myservice.AuthenticatedSSL
  server service.frontend 127.0.0.1:80 check

in the above config, i just use this for receiving the request in 443 and forwarding that to port 80 within the same haproxy machine.

What could be the reason for getting the error ?

Error:

myservice_tls~ myservice.AuthenticatedSSL/<NOSRV> 0/-1/-1/-1/0 503 237 - - SC-- 74/23/0/0/0 0/0