apache 2.2.15 +tomcat 6.0 同一台机器集群

zj2092

　　今天配乐一下,负载平衡没有问题,但是在同一台机器上面,session复制总是失败 :(
　　参考网站
　　http://wangzhen-1104.iteye.com/?page=3&show_full=true
　　http://www.iteye.com/topic/675914
　　http://www.ibm.com/developerworks/cn/opensource/os-lo-apache-tomcat/
　　http://blog.csdn.net/longaohun/archive/2010/05/11/5577324.aspx
　　http://blog.csdn.net/longaohun/archive/2010/05/11/5577324.aspx
　　官方
　　http://tomcat.apache.org/tomcat-6.0-doc/cluster-howto.html#Bind%20session%20after%20crash%20to%20failover%20node
　　http://tomcat.apache.org/connectors-doc/reference/workers.html

• All your session attributes must implement java.io.Serializable
  
• Uncomment the Cluster element in server.xml
  
• If you have defined custom cluster valves, make sure you have the ReplicationValve defined as well under the Cluster element in server.xml
  
• If your Tomcat instances are running on the same machine, make sure the tcpListenPort attribute is unique for each instance, in most cases Tomcat is smart enough to resolve this on it's own by autodetecting available ports in the range 4000-4100
  
• Make sure your web.xml has the <distributable/> element or set at your <Context distributable="true" />
  
• If you are using mod_jk, make sure that jvmRoute attribute is set at your Engine <Engine name="Catalina" jvmRoute="node01" > and that the jvmRoute attribute value matches your worker name in workers.properties
  
• Make sure that all nodes have the same time and sync with NTP service!
  
• Make sure that your loadbalancer is configured for sticky session mode.
  

　　只能是sticky session??
　　集群还有其他很多方案