"no services are available to handle this request"

Running HA-Proxy version 1.5.18 2016/05/10, when trying to hit the service and a backend server behind it I get a 403 and the following error:
“Sorry, no services are available to handle this request. :frowning:

This error returns 0 results in google and I’m curious if others have seen it before.

Full error here:

17:04:33 # curl -v https://domain-haproxy/javaprocess/prod/hostname/admin/meta/health/diagnostic
* About to connect() to haproxy port 443 (#0)
*   Trying 0.0.0.0... connected
* Connected to haproxy (0.0.0.0) port 443 (#0)
* Initializing NSS with certpath: *
*   CAfile: *
  CApath: none
* SSL connection using TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
* Server certificate:
* 	subject: ****
* 	start date: *****
* 	expire date: ******
* 	common name: *****
* 	issuer: ******
> GET /javaprocess/prod/hostname/admin/meta/health/diagnostic HTTP/1.1
> User-Agent: curl/7.19.7 (x86_64-redhat-linux-gnu) libcurl/7.19.7 NSS/3.44 zlib/1.2.3 libidn/1.18 libssh2/1.4.2
> Host: haproxy
> Accept: */*
>
* HTTP 1.0, assume close after body
< HTTP/1.0 403 Forbidden
< Cache-Control: no-cache
< Connection: close
< Content-Type: text/html
<
<html>
  <head>
    <title>Forbidden</title>
  </head>
  <body style="font-family:Arial,Helvetica,sans-serif; color:#6a737b;">
    <h2 style="color:#0d94d2;">Forbidden</h2>
    Sorry, no services are available to handle this request. &#9785;
  </body>
* Closing connection #0

It comes from your backend server. You’ll have to dig there.