Nginx 502 Bad Gateway Connection refused connecting to upstream - php

Question

Picking up and rejuvenating an old dormant project and seeing a persistent Nginx 502 bad gateway on my Apache/Nginx development and as this was originally developed by someone else I'm struggling to find the answer.
Trying to view example.com/test gives the error. Any ideas for what I can check please?
Nginx error.log:
2017/09/07 18:20:31 [error] 11911#0: *311 connect() failed (111: Connection refused) while connecting to upstream, client: xx.my.ip.xx, server: www.example.com, request: "GET /test HTTP/1.1", upstream: "http://127.0.0.1:8000/test", host: "www.example.com"
2017/09/07 18:20:42 [info] 11911#0: *312 client closed connection while SSL handshaking, client: xx.my.ip.xx, server: 0.0.0.0:443
Nginx config:
user nobody;
# no need for more workers in the proxy mode
worker_processes 4;
error_log /var/log/nginx/error.log info;
worker_rlimit_nofile 20480;
events {
worker_connections 5120; # increase for busier servers
use epoll; # you should use epoll here for Linux kernels 2.6.x
}
http {
# custom start
proxy_buffering off;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Scheme $scheme;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
# proxy_http_version appeared in nginx 1.1.4
proxy_http_version 1.1;
upstream thedevelopment {
server 127.0.0.1:8000;
}
server {
listen 80;
server_name www.example.com domain.com;
return 301 https://www.example.com$request_uri;
}
server {
listen 443;
ssl on;
ssl_certificate /etc/nginx/ssl/domain_com.crt;
ssl_certificate_key /etc/nginx/ssl/domain.key;
keepalive_timeout 70;
server_name www.example.com;
location / {
proxy_pass http://xx.xx.xx.130:8080;
}
location /test {
proxy_pass http://thedevelopment;
}
}
# custom end
server_name_in_redirect off;
server_names_hash_max_size 10240;
server_names_hash_bucket_size 1024;
include mime.types;
default_type application/octet-stream;
server_tokens off;
# remove/commentout disable_symlinks if_not_owner;if you get Permission denied error
# disable_symlinks if_not_owner;
sendfile on;
tcp_nopush on;
tcp_nodelay on;
keepalive_timeout 5;
gzip on;
gzip_vary on;
gzip_disable "MSIE [1-6]\.";
gzip_proxied any;
gzip_http_version 1.1;
gzip_min_length 1000;
gzip_comp_level 6;
gzip_buffers 16 8k;
# You can remove image/png image/x-icon image/gif image/jpeg if you have slow CPU
gzip_types text/plain text/xml text/css application/x-javascript application/xml image/png image/x-icon image/gif image/jpeg application/javascript application/xml+rss text/javascript application/atom+xml;
ignore_invalid_headers on;
client_header_timeout 3m;
client_body_timeout 3m;
send_timeout 3m;
reset_timedout_connection on;
connection_pool_size 256;
client_header_buffer_size 256k;
large_client_header_buffers 4 256k;
client_max_body_size 200M;
client_body_buffer_size 128k;
request_pool_size 32k;
output_buffers 4 32k;
postpone_output 1460;
proxy_temp_path /tmp/nginx_proxy/;
proxy_cache_path /var/cache/nginx levels=1:2 keys_zone=microcache:5m max_size=1000m;
client_body_in_file_only on;
log_format bytes_log "$msec $bytes_sent .";
log_format custom_microcache '$remote_addr - $remote_user [$time_local] '
'"$request" $status $body_bytes_sent '
'"$http_referer" "$http_user_agent" nocache:$no_cache';
include "/etc/nginx/vhosts/*";
}