hadoop installation in linux
 

Hello..
I tried to install hadoop 0.20.1 and hadoop plugin for eclipse(necessary for my project)in linux to form an distributed environment. I downloaded hadoop 0.20.1.tar.gz and when i tried to execute the jar file in it using the command java -jar hadoop 0.20.1.tar.gz
I encountered the error "Failed to load the main class Manifest from the jar file"
And when I tried to run the start-all.sh file in bin folder there is an error that "JAVA_HOME is not set"
Could any one help me to proceed..thanks in advance

You need to set the JAVA_HOME environmental variable:

Add that to the ~/.bashrc file of the user running the program.

---------- Post added 01-30-13 at 10:17 AM ----------

Also, you can test to see if the variable is set with this command:

Thank you for the Reply...

As per your guidence we have set the JAVA_HOME.
But when we tried to run start-all.sh it ask for a password and after giving the password the same error occurs "JAVA_HOME not set" which has been set earlier.

How to resolve this

when you type:
what is the result?

On excecuting the command echo $JAVA_HOME
we get /usr/lib/jvm/jre-1.6.0(this is the path of the JAVA_HOME I had set)

In eclipse Map/Reduce Location when we give "new hadoop location" this will ask for two port number.What port number should be given there? What ever port we give its not connecting.