Datanode process not running in Hadoop

Question

I set up and configured a multi-node Hadoop cluster using this tutorial.

When I type in the start-all.sh command, it shows all the processes initializing properly as

Answer 1

Stop all the services - ./stop-all.sh Format all the hdfs tmp directory from all the master and slave. Don't forget to format from slave.

Format the namenode.(hadoop namenode -format)

Now start the services on namenode. ./bin/start-all.sh

This made a difference for me to start the datanode service.