mod_proxy_balancer

Hi,

we are using Apache 2.2 as a Proxy and mod-proxy_balancer for load
balancing.
We want share the load between two tomcats. One Tomcat for users 'a-l'
and another tomcat for users 'm-z' (That's for optimize caching). If one
tomcat is not available, the other should take the load. So our
httpd.conf looks like that:


BalancerMember http://localhost:8082 status=-H
BalancerMember http://localhost:8083 status=H
Order Deny,Allow
Allow from all


BalancerMember http://localhost:8083 status=-H
BalancerMember http://localhost:8082 status=H
Order Deny,Allow
Allow from all


ProxyPassMatch ^/[a-l] balancer://cluster_a-l
stickysession=JSESSIONID|jsessionid
ProxyPassMatch ^/[m-z] balancer://cluster_m-z
stickysession=JSESSIONID|jsessionid


Now I've got two questions:

1. What is the difference between status an lbset?

It works too, if I change the conf to this:


BalancerMember http://localhost:8082 lbset=1
BalancerMember http://localhost:8083 lbset=2
Order Deny,Allow
Allow from all


BalancerMember http://localhost:8083 lbset=1
BalancerMember http://localhost:8082 lbset=2
Order Deny,Allow
Allow from all




2. I get the following warnings:

[warn] worker http://localhost:8083 already used by another worker
[warn] worker http://localhost:8082 already used by another worker


I understand the message: Both workers are used twice, once per
balancer. But I don't understand the message as a warning. I don't know
how this config can cause problems?



Thanks for all answers and infos.
Kind regards
Peter


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