How to restart NameNode or all the daemons in Hadoop?
By following methods we can restart the NameNode:
You can stop the NameNode individually using /sbin/hadoop-daemon.sh stop namenode command. Then start the NameNode using /sbin/hadoop-daemon.sh start namenode.
Use /sbin/stop-all.sh and the use /sbin/start-all.sh, command which will stop all the demons first. Then start all the daemons.
The sbin directory inside the Hadoop directory store these script files.
