Yarn nodemanager not starting up. Getting no errors - linux

Question

I have Hadoop 2.7.4 installed on Ubuntu 16.04. I'm trying to run it in Pseudo Mode.
I have a '/hadoop' partition mounted for all my hadoop files, NameNode and DataNode files.
My core-site.xml is:
<configuration>
<property>
<name>fs.defaultFS</name>
<value>hdfs://localhost:9000</value>
</property>
</configuration>
My hdfs-site.xml is:
<configuration>
<property>
<name>dfs.replication</name>
<value>1</value>
</property>
<property>
<name>dfs.name.dir</name>
<value>/hadoop/nodes/namenode</value>
</property>
<property>
<name>dfs.data.dir</name>
<value>/hadoop/nodes/datanode</value>
</property>
</configuration>
My mapred-site.xml is:
<configuration>
<property>
<name>Map-Reduce.framework.name</name>
<value>yarn</value>
</property>
</configuration>
My yarn-site.xml is:
<configuration>
<property>
<name>yarn.nodemanager.aux-services</name>
<value>Map-Reduce_shuffle</value>
</property>
</configuration>
After running
$ start-dfs.sh
$ start-yarn.sh
$ jps
I get the following daemons running.
2800 ResourceManager
2290 NameNode
4242 Jps
2440 DataNode
2634 SecondaryNameNode
start-yarn.sh gives me:
$ start-yarn.sh
starting yarn daemons
starting resourcemanager, logging to /hadoop/hadoop-2.7.4/logs/yarn-abdy-resourcemanager-abdy-hadoop.out
localhost: starting nodemanager, logging to /hadoop/hadoop-2.7.4/logs/yarn-abdy-nodemanager-abdy-hadoop.out
The nodemanager daemon does not seem to start at all.
I've tried for 2 days to fix this issue but I cannot seem to find a fix. Someone please guide me.

Answer 1

If your going to start hadoop daemons for the first time.
First you have to format your namenode :
hadoop namenode -format
Before formatting namenode make sure you delete existing
/hadoop/nodes/namenode and /hadoop/nodes/datanode folders
Then you execute:
hadoop namenode -format
Once formatting of namenode is done.
you execute following commands.
start-dfs.sh
start-yarn.sh