Proxy Troubleshooting

Summary

There are times when iDempiere will present you with an error dialog stating that the server is down or not responsive. This happens when the iDempiere webui code (running in your browser) cannot speak with the iDempiere server. The purpose of this page is to help you understand and fix this issue. It is a work in progress, and I will update it as we learn more.

Background Information

We use a reverse proxy between the iDempiere server and the rest of the world as a way to protect iDempiere and control/direct traffic. The chuboe iDempiere installation script installs apache as a reverse proxy. Larger systems use haproxy as a load balancer and reverse proxy.

haproxy

Add configuration to specify the number of connections in haproxy.cfg. Example:

 …
 frontend public
     maxconn 5000
     bind 0.0.0.0:80
 …
 backend chuboe-webui
     maxconn 5000
     mode http

References

• Apache
  • https://bz.apache.org/bugzilla/show_bug.cgi?id=63229
  • https://community.letsencrypt.org/t/reverse-proxy-issues/145359
  • https://stackoverflow.com/questions/62854501/apache-server-reverse-proxying-another-apache-server-getting-ah01102-error-re
• Linux Operating system
  • /linux-primer/ (see Operating System Limits section)
  • https://linuxcontainers.org/lxd/docs/master/reference/server_settings/#server-settings