Reported time is too far out of sync with master. Time difference of ...HBase時鐘不同步問題
HBbase的Master節點和Regionserver節點的時鐘不同步，導致HBase的Regionsever不能正常啟動，具體錯誤表現如下。
2017-10-25 17:34:04,137 FATAL [regionserver60020] regionserver.HRegionServer: ABORTING region server bionode1,60020,1508924043337: Unhandled: org.apache.hadoop.hbase.ClockOutOfSyncException: Server bionode1,60020,1508924043337 has been rejected; Reported time is too far out of sync with master. Time difference of 57422ms > max allowed of 30000ms
org.apache.hadoop.hbase.ClockOutOfSyncException: org.apache.hadoop.hbase.ClockOutOfSyncException: Server bionode1,60020,1508924043337 has been rejected; Reported time is too far out of sync with master.Time difference of 57422ms > max allowed of 30000ms
解決方法：
1）使用nptupdate同步Master節點和RegionServer節點的時鐘，同步過程參考http://blog.csdn.net/scorpio3k/article/details/49645219。
2）如果感覺nptupdate太複雜，可以手工設定每個機器的時間，並寫入CMOS裡，具體過程如下
首先設定本地時間 命令為 date –s '2017-10-25 18:10:20'
其次，將時間寫入CMOS，命令為 clock -w