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From Igor Cicimov <icici...@gmail.com>
Subject Re: [users@httpd] mod_proxy -> random routing change
Date Mon, 16 Jan 2012 10:56:19 GMT
http://httpd.apache.org/docs/2.2/mod/mod_proxy_balancer.html#stickyness_implementation


On Mon, Jan 16, 2012 at 8:31 PM, Vladimir Dvorak <vladimir.dvorak@vdsoft.org
> wrote:

> Hi guys,
>
> after weeks of investigation I have to ask you for help.
>
> Problem Description:
> The problem is that application is randomly (really non deterministically)
> logging users out - they are working with application, but suddenly (not
> all at one time) the user is logged out (because mod_proxy is probably
> start routing the user to second Tomcat server). We are using sticky
> sessions. Loadbalancer is running Apache + mod_proxy. There are two servers
> in the backend running Tomcats.
>
> Schematically:
> client -> https at loadbalancer (Apache, mod_proxy) -> {tomcat server1,
> tomcat server2}
>
> Loadbalancer setting (apache.conf):
> --snip--
>    ProxyRequests Off
>    ProxyStatus On
>    <Proxy *>
>        Order deny,allow
>        Allow from all
>    </Proxy>
>    RewriteEngine on
>    RewriteRule ^/$ /portal/ [R]
>    ProxyErrorOverride On
>    ProxyPass /portal/ balancer://productive/portal/
> stickysession=ESPROUTEID nofailover=Off timeout=180
>   <Proxy balancer://productive>
>        BalancerMember ajp://1.1.1.1:8009 keepalive=On route=1
> loadfactor=50 lbset=0 retry=30
>        BalancerMember ajp://1.1.1.2:8009 keepalive=On route=2
> loadfactor=50 lbset=0 retry=30
>    </Proxy>
> --snip--
>
> Loadbalancer's Apache compile options:
>  $ ./configure --prefix=/var/GridFrame/usr/**local/apache-2.2.21
> --enable-proxy --enable-rewrite --enable-ssl --enable-vhost-alias
> --with-mpm=worker --disable-cgi --disable-cgid --enable-proxy-http
> --enable-proxy-ajp --enable-proxy-connect --enable-proxy-balancer
> --enable-headers
>
>
>
> Do you please have any hints/advice so users are not suddenly routed to
> different Tomcat? Network between loadbalancer and Tomcats is stable.
>
>
> Thank you a lot,
>
> Vladimir
>
>
>
>
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