Apache - Reverse Proxy - Tomcat -- Protocol switching to HTTPS

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http://serverfault.com – The site works well on HTTP and HTTPS. There is no forced protocol switching on apache. However response.sendRedirect calls, be it relative or absolute are taking the user over to HTTPS. I checked the "Location" field of the response header to confirm this. The setup is like Apache->Reverse Proxy->Tomcat The redirect calls are running inside the Tomcat server. The problem is occuring as part of datacenter migration activity. The current setup does not report this problem. (HowTos)