1

i'm trying to install hadoop on a CentOS server.

I'm using that tutorial.

I stopped on that line:

bin/hadoop namenode –format

12/12/05 15:07:06 INFO namenode.NameNode: STARTUP_MSG: 
/************************************************************
STARTUP_MSG: Starting NameNode
STARTUP_MSG:   host = java.net.UnknownHostException: karpov: karpov
STARTUP_MSG:   args = [-format]
STARTUP_MSG:   version = 1.1.1
STARTUP_MSG:   build = https://svn.apache.org/repos/asf/hadoop/common/branches/branch-1.1 -r 1411108; compiled by 'hortonfo' on Mon Nov 19 10:48:11 UTC 2012
************************************************************/
Re-format filesystem in /tmp/hadoop-root/dfs/name ? (Y or N)

Where karpov is my machine name!

On Re-format filesystem in /tmp/hadoop-root/dfs/name ? (Y or N) both Y and N input don't change nothing..
How can i solve? Please help me!

Charles
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Jayyrus
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    Similar post: http://stackoverflow.com/questions/6307244/hadoop-namenode-format-returns-a-java-net-unknownhostexception – Lorand Bendig Dec 05 '12 at 14:32

2 Answers2

3

Check /etc/hosts and make sure you have your host added.

Jickson T George
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0

May be some special character in your /etc/hosts File.Clean it and write it agin the error must GO.

user2910022
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