I was helping our IT guys out this past weekend configuring a reverse proxy load balancing environment for JBoss/Tomcat behind Apache. I kept running into problems where requests coming from Apache looked like:
GET /foo//bar instead of
Unfortunately this was causing NPEs and resource not found errors in a third party servlet filter we are using to combine some our static resources. This is the Apache configuration that seems to have resolved the problem, I just wanted to post it here in case I ran up against it again.
# Placed in Apache conf for the site <Proxy balancer://app_cluster > BalancerMember http://app1/foo BalancerMember http://app2/foo BalancerMember http://app3/foo </Proxy> ProxyPass /foo/ balancer://app_cluster/ stickysession=JSESSIONID ProxyPassReverse /foo/ http://app1/foo/ ProxyPassReverse /foo/ http://app2/foo/ ProxyPassReverse /foo/ http://app3/foo/
The lesson here is attention to detail, especially your final slashes.