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From Igor Cicimov <>
Subject Re: [users@httpd] loadbalancer not working as expected
Date Mon, 19 Apr 2010 03:06:30 GMT

Have you done any modification on the tomcats? I think you need to put the
jvmRoute parameter as follows in the conf/server.xml file:

<Engine jvmRoute="appsvr1" name="Standalone" defaultHost="localhost"

and same for appsvr2 and appsvr3.



On Sat, Apr 17, 2010 at 5:35 AM, Joaquin Martinez <
> wrote:

> Hello all. Please, bear with me. I have made a configuration on
> file to balance dynamic servlet content through
> three application servers, using Tomcat as our web server. As per the
> configuration, I am not seeing the load being balance across all three
> app servers, but rather the load goes especifically to one of them.
> Once I shutdown this Tomcat server, the load goes to another server
> and so on. I am seeing this through the Sessions column under Tomcat's
> manager application on each server. It is my understanding the the
> load should be almost round-robin. So, Im going to show you my
> configuration to see if you can light me on any errors.
> First, we are using apache Apache/2.0.58 and Tomcat Tomcat/5.5.23.
> Operating system is HP-UX 11.31, Both components comes bundled with
> HP-UX Web Server Suite.
> Here's the content of the file.
> worker.list=loadbalancer,jkstatus
> worker.appsvr1.port=8009
> worker.appsvr1.lbfactor=37
> worker.appsvr1.connection_pool_timeout=600
> worker.appsvr1.retries=2
> worker.appsvr1.socket_keepalive=true
> worker.appsvr1.type=ajp13
> worker.appsvr2.port=8009
> worker.appsvr2.lbfactor=25
> worker.appsvr2.connection_pool_timeout=600
> worker.appsvr2.retries=2
> worker.appsvr2.socket_keepalive=true
> worker.appsvr2.type=ajp13
> worker.appsvr3.port=8009
> worker.appsvr3.lbfactor=37
> worker.appsvr3.connection_pool_timeout=600
> worker.appsvr3.retries=2
> worker.appsvr3.socket_keepalive=true
> worker.appsvr3.type=ajp13
> worker.jkstatus.type=status
> worker.loadbalancer.type=lb
> worker.loadbalancer.balance_workers=appsvr1,appsvr2,appsvr3
> worker.loadbalancer.sticky_session=true
> NOTE: Previously, I had lbfactor set to 37 on all three. and in an
> attemp to change the behaivour I have been flirting with lower values
> for appsvr2, but with not avail. Currently, the appsvr that is getting
> the most load is appsvr2. It is annoying, because to solve the problem
> I have to bounce Tomcat every time, since the application starts to
> gets slow. So, how do I do to get Apache to distribuite the load
> uniformily (at least round-robin) across all three ? Is there any
> missing configuration you can point out on the ? At
> your request, I can show you the mod_jk.conf file.
> Thansk! appreciate any help!
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