hadoop file system list my own root directory

Question

I met a very wired situation when I try to install single node hadoop yarn 2.2.0 on my mac. I follow the tutorial on this link: http://raseshmori.wordpress.com/2012/09/23/install-hadoop-2-0-1-yarn-nextgen/.

When I start the hadoop, and jps to check the status, it shows: (which means normal, I think)

5552 Jps
7162 ResourceManager
7512 Jps
7243 NodeManager
6962 DataNode
7060 SecondaryNameNode
6881 NameNode

However, after enter

hadoop fs -ls / 

The files lists are the files in my own root but not the hadoop file system root. There must be some error when I set the hadoop that mix my own fs with the hdfs. Could any one give me a hint about it?

Answer 1

Use the following command for accessing HDFS

hadoop fs -ls hdfs://localhost:9000/

Or

Populate ${HADOOP_CONF_DIR}/core-site.xml as follows. If your doing so even without specifying hdfs:// URI you will be able to access HDFS.

<configuration>
<property>
   <name>fs.default.name</name>
   <value>hdfs://localhost:9000</value>
</property>
</configuration>

Add the following line at the starting of the file $HOME/yarn/hadoop-2.0.1-alpha/libexec/hadoop-config.sh

export HADOOP_CONF_DIR=$HOME/yarn/hadoop-2.0.1-alpha/etc/hadoop