Tomcat会话通过mod_jk复制，当一个关闭时会过期

Question

我在使用mod_jk在不同机器上运行的两个tomcats之间设置会话复制，当一个tomcat关闭时，我的会话过期，当我刷新它到下一个tomcat时。但理想情况下，它不应该过期。任何帮助将受到高度赞赏。这是我的配置文件。

的Server.xml

<Engine name="Catalina" defaultHost="localhost" jvmRoute="worker1">

      <!--For clustering, please take a look at documentation at:
          /docs/cluster-howto.html  (simple how to)
          /docs/config/cluster.html (reference documentation) -->
      <!--
      <Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"/>
      -->
<!-- Clustering configuration start -->
<Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster" channelSendOptions="8">    

        <!--<Manager className="org.apache.catalina.ha.session.DeltaManager"
        expireSessionsOnShutdown="false"        
        notifyListenersOnReplication="true"/>-->

        <Channel className="org.apache.catalina.tribes.group.GroupChannel">

            <Membership className="org.apache.catalina.tribes.membership.McastService"
            address="228.0.0.4"
            port="45564" frequency="500"
            dropTime="3000"/>           
            <Sender className="org.apache.catalina.tribes.transport.ReplicationTransmitter">                
                <Transport className="org.apache.catalina.tribes.transport.nio.PooledParallelSender"/>              
            </Sender>           
            <Receiver className="org.apache.catalina.tribes.transport.nio.NioReceiver" 
            address="auto" port="4000" autoBind="100"
            selectorTimeout="5000" maxThreads="6"/>                     
            <Interceptor className="org.apache.catalina.tribes.group.interceptors.TcpFailureDetector"/>         
            <Interceptor className="org.apache.catalina.tribes.group.interceptors.MessageDispatch15Interceptor"/>   
            <Interceptor className="org.apache.catalina.tribes.group.interceptors.ThroughputInterceptor"/>                      
        </Channel>

        <Valve className="org.apache.catalina.ha.tcp.ReplicationValve" />       
        <ClusterListener className="org.apache.catalina.ha.session.ClusterSessionListener" />   


workers.properties

# First we define virtual worker's list
worker.list=jkstatus,LoadBalancer

# Enable virtual workers earlier
worker.jkstatus.type=status
worker.LoadBalancer.type=lb

# Add Tomcat instances as workers, three workers in our case
worker.worker1.type=ajp13
worker.worker1.host=localhost
worker.worker1.port=8009

worker.worker2.type=ajp13
worker.worker2.host=10.57.79.232
worker.worker2.port=8019

# Provide workers list to the load balancer
worker.LoadBalancer.balance_workers=worker1,worker2