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- Apache Web (HTTPS) Server - configured for AJP Proxy to Tomcat Java App Server
- Main page hitting AJP to Tomcat
- Embedded Resources (images, .js, .css, flash movies, etc.) served directly from Apache docroot
- Tomcat Server (receives AJP requests only from Apache Server)
- MySQL DB Server (receives JDBC connections from Tomcat Server only)
Root Cause:
- The 'iptables' service (Linux Firewall) on the Apache Server had been enabled
- Even though no packets were filtered, parsing all incoming packets slowed the network interface down to the point of filling the buffers - causing a backoff period
- Disabling the 'iptables' service solved the problem. Command 'service iptables stop' was issued, as well as 'chkconfig iptables off' (to permanently disable service on reboot).
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