org.apache.hadoop.hbase.regionserver.HRegionServer ABORTING region server Unhandled exception org.apache.hadoop.hbase.ClockOutOfSyncException

org.apache.hadoop.hbase.regionserver.HRegionServer: ABORTING region server : Unhandled exception: org.apache.hadoop.hbase.ClockOutOfSyncException:

This error occurs due to time synchronization between the nodes of the cluster, if the time difference between the node is more that 30000ms between the master and slave time then this error comes:

What is the solution ????

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”