 <p>@user2009755, you need to create a master and slave file only in the master. And in configuration files in $HADOOP_HOME/etc/hadoop, make necessary changes to the URI pointing to the master node.<br><br>NOTE: Try to format the namenode and delete the tmp files (usually /tmp/*) but if you changed it in <code>core-site.xml</code>, format that directory in all nodes and start all the daemons, it worked for me.</p>