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From Sagar Naik <sn...@attributor.com>
Subject Re: Hadoop Installation
Date Wed, 19 Nov 2008 18:29:41 GMT
Mithila Nagendra wrote:
> Hello
> I m currently a student at Arizona State University, Tempe, Arizona,
> pursuing my masters in Computer Science. I m currently involved in a
> research project that makes use of Hadoop to run various map reduce
> functions. Hence I searched the web on whats the best way to install Hadoop
> on different nodes in a cluster, and I stumbled upon your website.
> I used your tutorial on "How to install hadoop on a linux system" by Michael
> Noll to setup Hadoop on a UNIX system. I have a few questions related to it:
> 1. Does it matter that I m installing hadoop on UNIX and not on LINUX - do I
> have to follow different steps?
> 2. The configuration for hadoop-site.xml - does it remain the same no matter
> what platform is being used? Do I just type the same thing out in the file
> hadoop-site.xml present in the hadoop installation on the node?
> 3. When I try to start the daemons by executing the command
> conf/start-all.sh, I get an exception which says "hadoop: user specified log
> class 'org.apache.commons.logging.impl.Log4JLogger' cannot be found or is
> not usable" - this happens when tasktracker is being started. What steps do
> I take to deal with this exception?
start-all is in {HADOOP_HOME}/bin/ . What is your hadoop version ?

> I could send you the screen shot of the exception if you wish. It would be
> of immense help if you could provide answers for the above questions.
> Thank you! Looking forward to your reply.
> Best Regards
> Mithila Nagendra

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