apache tomcat 集群问题？

我的测试：
本地：

#server 
worker.list = controller 

#========tomcat1======== 

worker.tomcat1.port=11009 
worker.tomcat1.host=localhost 
worker.tomcat1.type=ajp13 
worker.tomcat1.lbfactor = 1 

#========tomcat2======== 

worker.tomcat2.port=12009 
worker.tomcat2.host=localhost 
worker.tomcat2.type=ajp13 
worker.tomcat2.lbfactor = 1 

#========controller,负载均衡控制器======== 

worker.controller.type=lb 
worker.controller.balanced_workers=tomcat1,tomcat2 
worker.controller.sticky_session=false 
#worker.controller.sticky_session_force=1 


所有session都会复制 
远程： 
#server 
worker.list = controller 

#========tomcat1======== 
worker.tomcat1.port=8009 
worker.tomcat1.host=172.168.20.4 
worker.tomcat1.type=ajp13 
worker.tomcat1.lbfactor = 1 

#========tomcat2======== 

worker.tomcat2.port=8009 
worker.tomcat2.host=172.168.20.5 
worker.tomcat2.type=ajp13 
worker.tomcat2.lbfactor = 1 

#========tomcat3======== 
worker.tomcat3.port=8009 
worker.tomcat3.host=172.168.20.6 
worker.tomcat3.type=ajp13 
worker.tomcat3.lbfactor = 1 

#========controller,负载均衡控制器======== 
worker.controller.type=lb 
worker.controller.balanced_workers=tomcat1,tomcat2,tomcat3 
worker.controller.sticky_session=1 
#worker.controller.sticky_session_force=1 

这样session复制最后一个，之前的session不会复制，
如果远程这样配置：
worker.controller.sticky_session=false
#worker.controller.sticky_session_force=1
session永远只保存一个。
不知怎么回事。