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
