One property (that is, mapreduce.framework.name) needs to be set to the etc/hadoop/ mapred-site.xml file. First, copy and replace the original template file to the mapred-site.xml as follows:

$  cp mapred-site.xml.template mapred-site.xml

Now, just copy the following lines of codes:

<configuration>
<property>
   <name>mapreduce.framework.name</name>
   <value>yarn</value>
 </property>
</configuration>