Problems running hadoop on mac osx with default example

Question

i installed hadoop using: brew install hadoop.

i have the following version installed:

hadoop version
Hadoop 2.3.0
Subversion http://svn.apache.org/repos/asf/hadoop/common -r 1567123
Compiled by jenkins on 2014-02-11T13:40Z
Compiled with protoc 2.5.0
From source with checksum dfe46336fbc6a044bc124392ec06b85
This command was run using /usr/local/Cellar/hadoop/2.3.0/libexec/share/hadoop/common/hadoop-common-2.3.0.jar

why does the starting the single node cluster fails? does brew install hadoop install the 32 or 64 bit version of hadoop? i have a 64 bit system...

./start-dfs.sh 
14/04/03 13:29:43 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
Starting namenodes on [localhost]
localhost: ssh: connect to host localhost port 22: Connection refused
localhost: ssh: connect to host localhost port 22: Connection refused
Starting secondary namenodes [0.0.0.0]
0.0.0.0: ssh: connect to host 0.0.0.0 port 22: Connection refused
14/04/03 13:29:45 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable

my ~/.profile looks like:

#Hadoop variables
echo 'Set Hadoop Variables...'
export JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.8.0.jdk/Contents/Home
export HADOOP_HOME=/usr/local/Cellar/hadoop/2.3.0
export PATH=$PATH:$HADOOP_INSTALL/bin
export PATH=$PATH:$HADOOP_INSTALL/sbin

which test example could i run to verify that hadoop works fine?

Answer 1

Make sure that you turn on Remote Login under System Preferences then File Sharing :

In order to check if it runs try jps command from command line. You should get something like:

43730 TaskTracker
43674 JobTracker
43730 NameNode
43582 DataNode
43611 SecondaryNameNode
43821 Jps

And now try some of the hadoop examples:

$ hadoop jar /usr/local/Cellar/hadoop/2.3.0/libexec/hadoop-examples-*.jar pi 10 100