Issue:If you master machine's region server is running and slave's regionserver is not running and if you start the slave's regionserver by bin/hbase regionserver start and if you get exception like “ hadoop.hbase.ClockOutOfSyncException: Server

Issue: 

If you master machine's region server is running and slave's regionserver is not running and if you start the slave's regionserver by   bin/hbase regionserver start   and if you get exception  like “ hadoop.hbase.ClockOutOfSyncException: Server localhost,60020,1337339438788 has been rejected; Reported time is too far out of sync with master.  Time difference of 34404ms > max allowed of 30000ms ” means . 

Fix:

check the master machine time(command”date”) and compare it slave machine time(date). If the difference is more than 30 sec- update the slave machine time to master machine's time. command-

“sudo date nnddhhmmyyyy.ss” 

usage- “sudo date 051817202012.00”