线上将两台lvs服务器做heartbeat热备，但是配置启动后，发现报错：
Jan 28 15:50:22 usvr-211 heartbeat: [2266]: ERROR: should_drop_message: attempted replay attack [usvr-210]? [gen = 1418354318, curgen = 1418354319] Jan 28 15:50:24 usvr-211 heartbeat: [2266]: WARN: nodename usvr-210 uuid changed to usvr-211 Jan 28 15:50:24 usvr-211 heartbeat: [2266]: WARN: nodename usvr-211 uuid changed to usvr-210 Jan 28 15:50:24 usvr-211 heartbeat: [2266]: ERROR: should_drop_message: attempted replay attack [usvr-210]? [gen = 1418354318, curgen = 1418354319] Jan 28 15:50:26 usvr-211 heartbeat: [2266]: WARN: nodename usvr-210 uuid changed to usvr-211 Jan 28 15:50:26 usvr-211 heartbeat: [2266]: WARN: nodename usvr-211 uuid changed to usvr-210 Jan 28 15:50:26 usvr-211 heartbeat: [2266]: ERROR: should_drop_message: attempted replay attack [usvr-210]? [gen = 1418354318, curgen = 1418354319] Jan 28 15:50:28 usvr-211 heartbeat: [2266]: WARN: nodename usvr-210 uuid changed to usvr-211 Jan 28 15:50:28 usvr-211 heartbeat: [2266]: WARN: nodename usvr-211 uuid changed to usvr-210 Jan 28 15:50:28 usvr-211 heartbeat: [2266]: ERROR: should_drop_message: attempted replay attack [usvr-210]? [gen = 1418354318, curgen = 1418354319] Jan 28 15:50:30 usvr-211 heartbeat: [2266]: WARN: nodename usvr-210 uuid changed to usvr-211 Jan 28 15:50:30 usvr-211 heartbeat: [2266]: WARN: nodename usvr-211 uuid changed to usvr-210 Jan 28 15:50:30 usvr-211 heartbeat: [2266]: ERROR: should_drop_message: attempted replay attack [usvr-210]? [gen = 1418354318, curgen = 1418354319] Jan 28 15:50:32 usvr-211 heartbeat: [2266]: WARN: nodename usvr-210 uuid changed to usvr-211 Jan 28 15:50:32 usvr-211 heartbeat: [2266]: WARN: nodename usvr-211 uuid changed to usvr-210 Jan 28 15:50:32 usvr-211 heartbeat: [2266]: ERROR: should_drop_message: attempted replay attack [usvr-210]? [gen = 1418354318, curgen = 1418354319] Jan 28 15:50:34 usvr-211 heartbeat: [2266]: WARN: nodename usvr-210 uuid changed to usvr-211 Jan 28 15:50:34 usvr-211 heartbeat: [2266]: WARN: nodename usvr-211 uuid changed to usvr-210
原因：由于usvr-211是通过vmware克隆复制usvr-210得到的，因此这两台设备完全一样。
而有人说是由于这两台机器的uuid不同导致，需让uuid重新生成。而uuid这个文件默认安装在/var/lib/heartbeat下，卸载并不被删除，如果不手动删除，重新安装仍会使用原来的
的uuid，因此删除后再重新安装果然ok。
