如何配置tomcat节点之间进行会话共享？ 

１、首先确保节点服务器均运行正常。 

２、修改节点服务器的server.xml文件。 

　在以下行增加： 

<Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"/>　　　＃允许集群,之前因为缺少这一行，

一把下面的配置贴到tomcat中，tomcat立即不能正常工作。折腾多次，记录一下。

 <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"/> 

            <Receiver className="org.apache.catalina.tribes.transport.nio.NioReceiver" 

                      address="auto" 

                      port="4000" 

                      autoBind="100" 

                      selectorTimeout="5000" 

                      maxThreads="6"/> 

            <Sender className="org.apache.catalina.tribes.transport.ReplicationTransmitter"> 

              <Transport className="org.apache.catalina.tribes.transport.nio.PooledParallelSender"/> 

            </Sender> 

            <Interceptor className="org.apache.catalina.tribes.group.interceptors.TcpFailureDetector"/> 

            <Interceptor className="org.apache.catalina.tribes.group.interceptors.MessageDispatch15Interceptor"/> 

          </Channel> 

          <Valve className="org.apache.catalina.ha.tcp.ReplicationValve" 

                 filter=""/> 

          <Valve className="org.apache.catalina.ha.session.JvmRouteBinderValve"/> 

          <Deployer className="org.apache.catalina.ha.deploy.FarmWarDeployer" 

                    tempDir="/tmp/war-temp/" 

                    deployDir="/tmp/war-deploy/" 

                    watchDir="/tmp/war-listen/" 

                    watchEnabled="false"/> 

          <ClusterListener className="org.apache.catalina.ha.session.JvmRouteSessionIDBinderListener"/> 

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

        </Cluster>    

以上内容为群集的设置，通过组播相互交换更新session. 

完成以上，还需要增加操作： 

mkdip /tmp/{war-temp,war-deploy,war-listen{ 

chmod 777 -R !$ 

即可。