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<p class="MsoNormal"><span style="font-family:"Calibri Light",sans-serif;color:#1F4E79">Hi Team,<o:p></o:p></span></p>
<p><span style="font-size:11.0pt;font-family:"Calibri Light",sans-serif;color:#1F4E79;mso-fareast-language:EN-US">I have setup a nginx server through which requests are forwarding to AWS ELB by nginx proxy_pass (configured on /etc/nginx/default.d/my.conf) on.
Behind AWS ELB tomcat application running on instances. After performing load test (15k-20k throughput) using Jmeter it is working fine, but after raising the throughput value it gives below upstream errors:<o:p></o:p></span></p>
<p><b><span style="font-size:11.0pt;font-family:"Calibri Light",sans-serif;color:#1F4E79;mso-fareast-language:EN-US">2019/06/06 15:54:32 [error] 31483#0: *924684 connect() failed (110: Connection timed out) while connecting to upstream, client: 172.29.XX.XX,
server: _, request: "GET /example1/model/v2/4SBWFWMMFWKWDWFS178S94DFDE/imageurl HTTP/1.1", upstream: "<a href="https://XX.XX.XX.XX:443/example1/model/v2/4SBWFWMMFWKWDWFS178S94DFDE/imageurl"><span style="color:#1F4E79;text-decoration:none">https://XX.XX.XX.XX:443/example1/model/v2/4SBWFWMMFWKWDWFS178S94DFDE/imageurl</span></a>",
host: "myapp.example.com"<o:p></o:p></span></b></p>
<p><b><span style="font-size:11.0pt;font-family:"Calibri Light",sans-serif;color:#1F4E79;mso-fareast-language:EN-US">2019/06/10 13:55:20 [error] 28423#0: *492252 no live upstreams while connecting to upstream, client: 172.29.XX.XX, server: _, request: "GET
/example1/model/v2/4SBWFWMMFWKWDWFS178S94DFDE/imageurl HTTP/1.1", upstream: "<a href="https://XX.XX.XX.XX:443/example1/model/v2/4SBWFWMMFWKWDWFS178S94DFDE/">https://XX.XX.XX.XX:443/example1/model/v2/4SBWFWMMFWKWDWFS178S94DFDE/</a>active", host: " myapp.example.com
"<o:p></o:p></span></b></p>
<p><span style="font-size:11.0pt;font-family:"Calibri Light",sans-serif;color:#1F4E79;mso-fareast-language:EN-US">I have already tried to made many changes in nginx.conf file, below is showing complete conf file details. On restart or reload nginx service,
issue is resolved. But this is not the permanent solution.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri Light",sans-serif;color:#1F4E79"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri Light",sans-serif;color:#1F4E79">Nginx.conf :<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri Light",sans-serif;color:#1F4E79"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"># * Official Russian Documentation: http://nginx.org/ru/docs/<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN">user nginx;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN">worker_processes 8;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN">error_log /var/log/nginx/error.log debug;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN">pid /run/nginx.pid;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"># Load dynamic modules. See /usr/share/nginx/README.dynamic.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN">include /usr/share/nginx/modules/*.conf;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN">events {<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"> worker_connections 50000;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"> use epoll;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"> }<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN">worker_rlimit_nofile 30000;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN">http {<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"> log_format main '$remote_addr - $remote_user [$time_local] "$request" '<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"> '$status $body_bytes_sent "$http_referer" '<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"> '"$http_user_agent" "$http_x_forwarded_for"';<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"> access_log /var/log/nginx/access.log main;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"> sendfile on;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"> tcp_nopush on;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"> tcp_nodelay on;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"> keepalive_timeout 30;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"> types_hash_max_size 2048;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"> include /etc/nginx/mime.types;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"> default_type application/octet-stream;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"> # Default is HTTP/1, keepalive is only enabled in HTTP/1.1<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"> proxy_http_version 1.1;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"> # Remove the Connection header if the client sends it,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"> # it could be "close" to close a keepalive connection<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"> proxy_set_header Connection "";<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"> # Load modular configuration files from the /etc/nginx/conf.d directory.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"> # See http://nginx.org/en/docs/ngx_core_module.html#include<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"> # for more information.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"> include /etc/nginx/conf.d/*.conf;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"> server {<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"> listen 80 default_server;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"> listen [::]:80 default_server;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"> server_name _;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"> root /usr/share/nginx/html;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"> # Load configuration files for the default server block.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"> include /etc/nginx/default.d/*.conf;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"> error_page 404 /404.html;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"> location = /40x.html {<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"> }<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"> error_page 500 502 503 504 /50x.html;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"> location = /50x.html {<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"> }<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-IN"> }<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri Light",sans-serif;color:#1F4E79"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri Light",sans-serif;color:#1F4E79"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri Light",sans-serif;color:#1F4E79">Thanks in advance<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri Light",sans-serif;color:#1F4E79"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri Light",sans-serif;color:#1F4E79">Regards,<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.5pt;color:#004B76;mso-fareast-language:EN-IN">Vivek Solanki</span></b><span style="font-size:10.5pt;color:#004B76;mso-fareast-language:EN-IN"><br>
<br>
<o:p></o:p></span></p>
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