apache mod_jk loadbalancing glassfish cluster instances issue

Question

I have a Java EE6 EAR application deployed on an Open Source GlassFish v3.1 server running on a Windows 2003 R2 Server on 2 clusters with 2 instances each. To load balance the work load, I am using an apache http server with mod_jk. When I look at the jk status page however I see that the work is being distributed to only one of the instances in each cluster even though all four have the same lbfactor of 1. Any ideas?

Here is my workers.properties config:

worker.list=loadbalancerLocal,status

worker.status.type=status

worker.ViewerLocalInstance1.type=ajp13
worker.ViewerLocalInstance1.host=localhost
worker.ViewerLocalInstance1.port=8109
worker.ViewerLocalInstance1.lbfactor=1
worker.ViewerLocalInstance1.socket_keepalive=1
worker.ViewerLocalInstance1.socket_timeout=1000


worker.ViewerLocalInstance2.type=ajp13
worker.ViewerLocalInstance2.host=localhost
worker.ViewerLocalInstance2.port=8209
worker.ViewerLocalInstance2.lbfactor=1
worker.ViewerLocalInstance2.socket_keepalive=1
worker.ViewerLocalInstance2.socket_timeout=1000

worker.ViewerLocalInstance3.type=ajp13
worker.ViewerLocalInstance3.host=localhost
worker.ViewerLocalInstance3.port=8309
worker.ViewerLocalInstance3.lbfactor=1
worker.ViewerLocalInstance3.socket_keepalive=1
worker.ViewerLocalInstance3.socket_timeout=1000

worker.ViewerLocalInstance4.type=ajp13
worker.ViewerLocalInstance4.host=localhost
worker.ViewerLocalInstance4.port=8409
worker.ViewerLocalInstance4.lbfactor=1
worker.ViewerLocalInstance4.socket_keepalive=1
worker.ViewerLocalInstance4.socket_timeout=1000

worker.loadbalancerLocal.type=lb
worker.loadbalancerLocal.sticky_session=True
worker.loadbalancerLocal.balance_workers=ViewerLocalInstance1,ViewerLocalInstance2,ViewerLocalInstance3,ViewerLocalInstance4

Here is my httpd config for mod_jk

LoadModule jk_module modules/mod_jk.so
JkWorkersFile conf/workers.properties
# Where to put jk logs
JkLogFile logs/mod_jk.log
# Set the jk log level [debug/error/info]
JkLogLevel info
# Select the log format
JkLogStampFormat "[%a %b %d %H:%M:%S %Y] "
# JkOptions indicate to send SSL KEY SIZE,
JkOptions +ForwardKeySize +ForwardURICompat -ForwardDirectories
# JkRequestLogFormat set the request format
JkRequestLogFormat "%w %V %T"

JkMount /Viewer/* loadbalancerLocal
JkMount /Viewer loadbalancerLocal
JkMount /jkstatus/* status

Answer 1

You have the sticky session turned on. Try turning it off. You may need to unset jvmRoute too if you have set it.