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

1. Stop the dfs and yarn first.
2. Remove the datanode and namenode directories as specified in the core-site.xml file.
3. Re-create the directories.

4. Then re-start the dfs and the yarn as follows.

   start-dfs.sh

   start-yarn.sh

   mr-jobhistory-daemon.sh start historyserver

   Hope this works fine.