Can't start NameNode daemon and DataNode daemon in Hadoop - hadoop

Question

I am trying to run Hadoop in Pseudo-Distributed mode. For this I am trying to follow this tutorial http://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-common/SingleCluster.html
I can ssh to my localhost and Format the filesystem. However, I can't start NameNode daemon and DataNode daemon by this command :
sbin/start-dfs.sh
When I execute it with sudo I get:
ubuntu#ip-172-31-42-67:/usr/local/hadoop-2.6.0$ sudo sbin/start-dfs.sh
Starting namenodes on [localhost]
localhost: Permission denied (publickey).
localhost: Permission denied (publickey).
Starting secondary namenodes [0.0.0.0]
0.0.0.0: Permission denied (publickey).
and when executed without sudo:
ubuntu#ip-172-31-42-67:/usr/local/hadoop-2.6.0$ sbin/start-dfs.sh
Starting namenodes on [localhost]
localhost: mkdir: cannot create directory ‘/usr/local/hadoop-2.6.0/logs’: Permission denied
localhost: chown: cannot access ‘/usr/local/hadoop-2.6.0/logs’: No such file or directory
localhost: starting namenode, logging to /usr/local/hadoop-2.6.0/logs/hadoop-ubuntu-namenode-ip-172-31-42-67.out
localhost: /usr/local/hadoop-2.6.0/sbin/hadoop-daemon.sh: line 159: /usr/local/hadoop-2.6.0/logs/hadoop-ubuntu-namenode-ip-172-31-42-67.out: No such file or directory
localhost: head: cannot open ‘/usr/local/hadoop-2.6.0/logs/hadoop-ubuntu-namenode-ip-172-31-42-67.out’ for reading: No such file or directory
localhost: /usr/local/hadoop-2.6.0/sbin/hadoop-daemon.sh: line 177: /usr/local/hadoop-2.6.0/logs/hadoop-ubuntu-namenode-ip-172-31-42-67.out: No such file or directory
localhost: /usr/local/hadoop-2.6.0/sbin/hadoop-daemon.sh: line 178: /usr/local/hadoop-2.6.0/logs/hadoop-ubuntu-namenode-ip-172-31-42-67.out: No such file or directory
localhost: mkdir: cannot create directory ‘/usr/local/hadoop-2.6.0/logs’: Permission denied
localhost: chown: cannot access ‘/usr/local/hadoop-2.6.0/logs’: No such file or directory
localhost: starting datanode, logging to /usr/local/hadoop-2.6.0/logs/hadoop-ubuntu-datanode-ip-172-31-42-67.out
localhost: /usr/local/hadoop-2.6.0/sbin/hadoop-daemon.sh: line 159: /usr/local/hadoop-2.6.0/logs/hadoop-ubuntu-datanode-ip-172-31-42-67.out: No such file or directory
localhost: head: cannot open ‘/usr/local/hadoop-2.6.0/logs/hadoop-ubuntu-datanode-ip-172-31-42-67.out’ for reading: No such file or directory
localhost: /usr/local/hadoop-2.6.0/sbin/hadoop-daemon.sh: line 177: /usr/local/hadoop-2.6.0/logs/hadoop-ubuntu-datanode-ip-172-31-42-67.out: No such file or directory
localhost: /usr/local/hadoop-2.6.0/sbin/hadoop-daemon.sh: line 178: /usr/local/hadoop-2.6.0/logs/hadoop-ubuntu-datanode-ip-172-31-42-67.out: No such file or directory
Starting secondary namenodes [0.0.0.0]
0.0.0.0: mkdir: cannot create directory ‘/usr/local/hadoop-2.6.0/logs’: Permission denied
0.0.0.0: chown: cannot access ‘/usr/local/hadoop-2.6.0/logs’: No such file or directory
0.0.0.0: starting secondarynamenode, logging to /usr/local/hadoop-2.6.0/logs/hadoop-ubuntu-secondarynamenode-ip-172-31-42-67.out
0.0.0.0: /usr/local/hadoop-2.6.0/sbin/hadoop-daemon.sh: line 159: /usr/local/hadoop-2.6.0/logs/hadoop-ubuntu-secondarynamenode-ip-172-31-42-67.out: No such file or directory
0.0.0.0: head: cannot open ‘/usr/local/hadoop-2.6.0/logs/hadoop-ubuntu-secondarynamenode-ip-172-31-42-67.out’ for reading: No such file or directory
0.0.0.0: /usr/local/hadoop-2.6.0/sbin/hadoop-daemon.sh: line 177: /usr/local/hadoop-2.6.0/logs/hadoop-ubuntu-secondarynamenode-ip-172-31-42-67.out: No such file or directory
0.0.0.0: /usr/local/hadoop-2.6.0/sbin/hadoop-daemon.sh: line 178: /usr/local/hadoop-2.6.0/logs/hadoop-ubuntu-secondarynamenode-ip-172-31-42-67.out: No such file or directory
I also notice now that when executing ls to check content of hfs directories like here, it fails:
ubuntu#ip-172-31-42-67:~/dir$ hdfs dfs -ls output/
ls: Call From ip-172-31-42-67.us-west-2.compute.internal/172.31.42.67 to localhost:9000 failed on connection exception: java.net.ConnectException: Connection refused; For more details see: http://wiki.apache.org/hadoop/ConnectionRefused
Can anyone tell me what could be the problem ?

Answer 1

I had the same problem and the only solution I found was:
https://anuragsoni.wordpress.com/2015/07/05/hadoop-start-dfs-sh-localhost-permission-denied-how-to-fix/
Which suggest you to generate a new ssh-rsa key

Answer 2

The errors above suggest a permissions problem.
You have to make sure that the hadoop user has the proper privileges to /usr/local/hadoop.
For this purpose you can try:
sudo chown -R hadoop /usr/local/hadoop/
Or
sudo chmod 777 /usr/local/hadoop/

Answer 3

Please make sure that you do the following "Configuration" correctly, you need to edit 4 ".xml" files:
Edit the file hadoop-2.6.0/etc/hadoop/core-site.xml , between , put in :
<property>
<name>fs.defaultFS</name>
<value>hdfs://localhost:9000</value>
</property>
Edit the file hadoop-2.6.0/etc/hadoop/hdfs-site.xml, between put in:
<property>
<name>dfs.replication</name>
<value>1</value>
</property>
Edit the file hadoop-2.6.0/etc/hadoop/mapred-site.xm, between paste the following and save
<property>
<name>mapreduce.framework.name</name>
<value>yarn</value>
</property>
Edit the file hadoop-2.6.0/etc/hadoop/yarn-site.xml, between paste the following and save
<property>
<name>yarn.nodemanager.aux-services</name>
<value>mapreduce_shuffle</value>
</property>