weblogic 11g 64位晋级后dwr报错：A request has been denied as a potential CSRF attack

weblogic 11g 64位升级后dwr报错：A request has been denied as a potential CSRF attack
最近 经理让升级weblogic64位 后，发现所有页面带dwr的全部废掉。。。
报错信息为： :A request has been denied as a potential CSRF attack
经过一番查找后，在web.xml中加入以下代码段 就ok了

<init-param>    
      <param-name>crossDomainSessionSecurity</param-name>            
      <param-value>false</param-value>    
</init-param>