title: upstream sent no valid HTTP/1.0 header while reading response header from upstream
body: <p>we are facing issue in nginx while hitting the post request Advanced Rest Client.</p>
  
  <p>Error message - upstream sent no valid HTTP/1.0 header while reading response header from upstream</p>
  
  <p>nginx.conf file is :</p>
  
  <pre><code>#user  nobody;
  worker_processes  1;
  
  #error_log  logs/error.log;
  #error_log  logs/error.log  notice;
  error_log  logs/error.log  info;
  
  pid        logs/nginx.pid;
  
  
  events {
      worker_connections  1024;
  }
  
  
  http {
      include       mime.types;
      default_type  application/octet-stream;
  
      #log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
      #                  '$status $body_bytes_sent "$http_referer" '
      #                  '"$http_user_agent" "$http_x_forwarded_for"';
  
      #access_log  logs/access.log  main;
  
      sendfile        on;
      #tcp_nopush     on;
  
      #keepalive_timeout  0;
      keepalive_timeout  65;
  
      #gzip  on;
      upstream uic_entry {
      server xx.xx.xx.xx:4005;
      }
      upstream mid_entry {
      server xx.xx.xx.xx:4060;
      }
      upstream rule_entry {
      server xx.xx.xx.xx:4070;
      }
      upstream spike_entry {
      server xx.xx.xx.xx:5005;
      }
      upstream notification_entry {
      server xx.xx.xx.xx:10039;
      }
      upstream oauth_entry {
      server xx.xx.xx.xx:4000;
      }
          upstream check_entry {
      server xx.xx.xx.xx:3000;
      }
       ## our http server at port 80
          server {
          listen      80;
          server_name xx.xx.xx.com;
        # redirect http to https
          rewrite        ^ https://$server_name$request_uri? permanent;
          }
          ## Our https server at port 443
     server {
      listen       443;
      server_name  xx.xx.xx.com;
      underscores_in_headers on;
      ssl                  on;
          ssl_certificate      /usr/local/nginx/conf/xxx-server.crt;
          ssl_certificate_key  /usr/local/nginx/conf/xxx-server.key;
      ssl_verify_depth 4;
      large_client_header_buffers 8 32k;
      proxy_next_upstream error timeout invalid_header http_500 http_502 http_503         http_504;
          proxy_redirect off;
          ignore_invalid_headers off;
          proxy_buffering off;
          proxy_set_header        Host            $host;
          proxy_set_header        X-Real-IP       $remote_addr;
          proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;
          proxy_set_header X-NginX-Proxy true;
          proxy_set_header  Accept-Encoding  "";
          proxy_read_timeout 200;
  
      location ~\.(js|css|png|jpg|jpeg|gif|ico)$ {
          #root   html;
          #index  index.html index.htm;
          #return 503;
          proxy_pass          http://uic_entry;
      }
  
      location ~/(.*)/(v.*) {
      proxy_pass          http://mid_entry;
      }
      location /xxxx/ {
          proxy_pass          http://mid_entry;
      }
  
      location /templateservice/middleware/ {
      proxy_pass          http://mid_entry;
      }
          location /templateservice/trule/ {
          proxy_pass          http://rule_entry;
      }
  
      location /templateservice/security/ {
          proxy_pass          http://spike_entry;
      }
  
      location /checkAuthentication {
          proxy_pass          http://check_entry;
      }
      location /xxxx {
          proxy_pass          http://oauth_entry;
      }
       location /xxxx/client_register {
          proxy_pass          http://oauth_entry;
      }
       location /xxxx/access_token {
          proxy_pass          http://oauth_entry;
      }
  
      location / {
          #root   html;
          #index  index.html index.htm;
          #return 503;
          proxy_pass          http://uic_entry;
      }
      location /EmailService {
          #root   html;
          #index  index.html index.htm;
          #return 503;
          proxy_pass          http://notification_entry;
      }
      location /NotificationService {
          #root   html;
          #index  index.html index.htm;
          #return 503;
          proxy_pass          http://notification_entry;
      }
  }
  
  }
  </code></pre>
  
  <p>Please help us to fix this issue.</p>