Configuration of YARN

You can perform the following steps for the configuration of YARN:

1. Start Hadoop NameNode, secondary NameNode, and DataNode
2. Alter yarn-env.sh.

3. Add the following under the definition of YARN_CONF_DIR:

export HADOOP_CONF_DIR="${HADOOP_CONF_DIR:-$YARN_HOME/etc/hadoop}"
export HADOOP_COMMON_HOME="${HADOOP_COMMON_HOME:-$YARN_HOME}"
export HADOOP_HDFS_HOME="${HADOOP_HDFS_HOME:-$YARN_HOME}"  

4. Alter yarn-site.xml:

<?xml version="1.0"?>
<configuration>
  <property>
    <name>yarn.nodemanager.aux-services</name>
    <value>mapreduce.shuffle</value>
  </property>
  <property>
    <name>yarn.nodemanager.aux-services.mapreduce.shuffle.class</name>
    <value>org.apache.hadoop.mapred.ShuffleHandler</value>
  </property>
</configuration> 

5. Alter mapred-site.xml:

<?xml version="1.0"?>
<?xml-stylesheet href="configuration.xsl"?>
<configuration>
  <property>
    <name>mapreduce.framework.name </name>
    <value>yarn</value>
  </property>
</configuration>  

6. Start the YARN services:

yarn resourcemanager
yarn nodemanager