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

In case of Mac os(Pseudo-distributed mode):

Open terminal

1. Stop dfs. 'sbin/stop-all.sh'.
2. cd /tmp
3. rm -rf hadoop*
4. Navigate to hadoop directory. Format the hdfs. bin/hdfs namenode -format
5. sbin/start-dfs.sh