org.apache.catalina.tribes.group.interceptors.TcpFailureDetector memberAlive
严重: Unable to perform. failure detection check, assuming member down.
java.net.NoRouteToHostException: No route to host
防火墙对应的Tomcat端口未开发引起的，只要添加端口就OK了
/etc/init.d/iptables status vi /etc/sysconfig/iptables -A INPUT -p tcp -m state --state NEW -m tcp --dport 8081 -j ACCEPT
原文：http://my.oschina.net/GoogleFan/blog/517919