Vaadin + ApacheWebserver+ Tomcat 8 + Mod proxy Balancer problem

General
1

Hi i have a problem that is driving me crazy.

My environment is the following in my Winndows 7 local machine. (vaadin server 7.5.7)

Apache 2.4 web server wit mod proxy with mod_proxy balancer configured.
Two tomcat version 8 beside Apache running ok

i added the following lines in my Apache httpd config file described below

<VirtualHost *:80>
ServerName localhost
ProxyRequests off
<Proxy balancer://mycluster>
BalancerMember ajp://localhost:8109 keepalive=On ttl=60 retry=1 timeout=1 ping=1

<Proxy balancer://mycluster2>
BalancerMember ajp://localhost:8109 loadfactor=1 keepalive=On ttl=60 retry=1 timeout=1 ping=1 route=server1
BalancerMember ajp://localhost:8209 loadfactor=1 keepalive=On ttl=60 retry=1 timeout=1 ping=1 route=server2

<Proxy *>
Order deny,allow
Allow from all

# Passes thru track. or api.
ProxyPreserveHost On
ProxyStatus On

App Definitions

ProxyPass /Vadin02 balancer://mycluster2/Vadin02
ProxyPassReverse /Vadin02 balancer://mycluster2/Vadin02
ProxyPass /examples balancer://mycluster2/examples/
ProxyPassReverseCookiePath /Vadin02 /

as you can see i have defined two balancer (mycluster and my cluster2) mycluster1 points to one Tomcat1 and mycluster2 points to tomcat1 and tomcat2

The applications that i have defined are Vadin02 (the sample app with a click button generated with vaadin an the other one is the examples app loaded in tomcat 8 installation.

from my browser i can run localhost/examples/ and is OK the tomcat app work ok
from my browser i can run localhost/Vadin02/ and also works ok…


But…if i change my apache config to use only one balancer , tomcat app works ok but vaadin app sow message session expired…

<VirtualHost *:80>
ServerName localhost
ProxyRequests off

<Proxy balancer://mycluster>
BalancerMember ajp://localhost:8109 loadfactor=1 keepalive=On ttl=60 retry=1 timeout=1 ping=1 route=server1
BalancerMember ajp://localhost:8209 loadfactor=1 keepalive=On ttl=60 retry=1 timeout=1 ping=1 route=server2

<Proxy *>
Order deny,allow
Allow from all

# Passes thru track. or api.
ProxyPreserveHost On
ProxyStatus On

App Definitions

ProxyPass /Vadin02 balancer://mycluster/Vadin02
ProxyPassReverse /Vadin02 balancer://mycluster2/Vadin02
ProxyPassReverseCookiePath /Vadin02 /
ProxyPass /examples balancer://mycluster2/examples/a

So…what can i do ? any ideas?

Thanks in advance

2

Hi Raul,
did you solve your issue ?
error of “session expires” depends on missing websocket proxing
ajp protocol cannot handle websockets, if you look at tomcat log access files, perhaps you’ll find many exceptions
I’m trying to setup a tomcat cluster and I do not know how to handle them.
Does anybody has a working proxy configuration for a loadbalancer ?
I had setup one that reverse proxy a single tomcat but I cannot figure out how to change it for a cluster.

Regards