1 如果机群时间不同步，那么启动子节点RegionServer就会出问题
aused by: org.apache.hadoop.hbase.ipc.RemoteWithExtrasException(org.apache.hadoop.hbase.ClockOutOfSyncException): org.apache.hadoop.hbase.ClockOutOfSyncException: Server slave1,60020,1398673427650 has been rejected; Reported time is too far out of sync with master. Time difference of 43201045ms > max allowed of 180000ms
解决办法，同步集群时间，可参考http://www.cnblogs.com/liuchangchun/p/4685032.html
原文：http://www.cnblogs.com/liuchangchun/p/4685128.html