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From Carlos García <carlos.gar...@digibis.com>
Subject Re: Sticky sessions not working at get_most_suitable_worker
Date Sun, 01 Jul 2018 09:30:34 GMT

Thanks Chirs, you are right. I've changed jvmRoute to worker's name, not worker's hostname,
and it's working fine.


Thanks, again.


Carlos

________________________________
De: Christopher Schultz <chris@christopherschultz.net>
Enviado: sábado, 30 de junio de 2018 22:04:21
Para: Tomcat Users List; Carlos García
Asunto: Re: Sticky sessions not working at get_most_suitable_worker

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Carlos,

On 6/30/18 4:12 AM, Carlos García wrote:
> I' m working on a LB configuration with Apache/2.4.18 (Ubuntu)
> mod_jk/1.2.41 and not getting wanted results.
>
>
> My workers config is:
>
>
> worker.list=balanceFFG, jk-status # tomcat-pro-03 por COLT
> worker.FFG1.host=tomcat-pro-03 worker.FFG1.port=8009
> worker.FFG1.type=ajp13 worker.FFG1.sticky_session=true
>
> # tomcat-pro-06 por COLT worker.FFG2.host=tomcat-pro-06
> worker.FFG2.port=8010 worker.FFG2.type=ajp13
> worker.FFG2.sticky_session=true
>
> worker.balanceFFG.type=lb worker.balanceFFG.balance_workers=FFG1,
> FFG2 worker.jk-status.type=status

Thank you for posting your configuration.

You need to set the sticky_session attribute on the *balancer* and not
on the individual workers, although the default value for
"sticky_session" is in fact "true", so this should not matter.

If you look at your mod_jk log file, does it say that sticky_session
isn't valid for a normal AJP13 worker? (It really should if it doesn't.)

> VirtualHost config is:
>
> Header edit Set-Cookie "^(.*; Path=)/ffgonzalezarch_pro/?(.*)"
> $1/$2

What is *this* for?  ^^^^

> RewriteEngine on RewriteRule ^(.*)$ /ffgonzalezarch_pro$1 [PT,L]
> RewriteRule ^(.*)$ /ffgonzalezarch_pro/$1 [CO]
>
> JkMount /ffgonzalezarch_pro/* balanceFFG
>
>
> jvmRoute set in Engine section in Tomcat server.xml

What did you set it/them to?

> And finally, this is the result in mod_jk debug log:
>
>
> [Sat Jun 30 06:52:29.565 2018] [6628:139806621300480] [debug]
> service::jk_lb_worker.c (1270): service sticky_session=1
> id='7E9778933D54A11F3D91B9AF81653C53.tomcat-pro-06' [Sat Jun 30
> 06:52:29.565 2018] [6628:139806621300480] [debug]
> get_most_suitable_worker::jk_lb_worker.c (1078): searching worker
> for partial sessionid
> 7E9778933D54A11F3D91B9AF81653C53.tomcat-pro-06 [Sat Jun 30
> 06:52:29.565 2018] [6628:139806621300480] [debug]
> get_most_suitable_worker::jk_lb_worker.c (1086): searching worker
> for session route tomcat-pro-06 [Sat Jun 30 06:52:29.565 2018]
> [6628:139806621300480] [debug]
> get_most_suitable_worker::jk_lb_worker.c (1136): found best worker
> FFG1 (FFG1) using method 'Request'
>
> So, a session from FFG2(omcat-pro-06) ends in FFG1(tomcat-pro-03).
> Why!! Sessionid is telling you FFG2(omcat-pro-06)!!

It looks like you have set jvmRoute to "tomcat-pro-06" and
"tomcat-pro-03" but the worker's route names default to the worker
names (FFG1, FFG2). So, you either need this in workers.properties:

worker.FFG1.route=tomcat-pro-03
and
worker.FFG2.route=tomcat-pro-06

or you need this in conf/server.xml

<Engine name="Catalina" defaultHost="localhost" jvmRoute="FFG1">
and
<Engine name="Catalina" defaultHost="localhost" jvmRoute="FFG2">

Hope that helps,
- -chris
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