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From Divij Durve <divij.t...@gmail.com>
Subject Re: permission denied error on multiple slaves
Date Sat, 11 Jul 2009 05:58:18 GMT
ok thanks for the advce ill have a look into this and get back to u on
sunday. Really appreciate it. However, Im baffled at to y it would do this
only when there are 2 data nodes and when there is 1 it works fine any ideas
on that one? Im not saying this solution doesnt work im just asking coz im
curious and trying to understand it properly. Also im running start-dfs.sh
or start-all.sh

On Fri, Jul 10, 2009 at 1:34 PM, Alex Loddengaard <alex@cloudera.com> wrote:

> This sounds like a SSH key issue.  I'm going to assume that you're invoking
> the start-*.sh scripts from the NameNode.  On the NameNode, you'll want to
> run "ssh-keygen -t rsa" as the user that runs Hadoop (probably "hadoop").
> This should create two files: ~/.ssh/id_rsa and ~/.ssh/id_rsa.pub.  scp the
> *.pub file to all of your other nodes, and store that file as
> ~/.ssh/authorized_keys on each node, including the NameNode.  Give
> ~/.ssh/authorized_keys 600 permissions.  You should be good to go.  I
> recommend testing this stuff before running the start-*.sh scripts.
> You may always want to look at our (Cloudera's) RPMs and DEBs.  They
> simplify the installation of Hadoop and give you init scripst to start all
> the daemons.  Then you can avoid the start-*.sh scripts.  <
> http://www.cloudera.com/hadoop>
> Hope this helps.
> Alex
> On Fri, Jul 10, 2009 at 9:19 AM, Divij Durve <divij.tech@gmail.com> wrote:
> > Hey everyone,
> >
> > I am quite new to using hadoop. I have got the config and everything
> > working
> > perfect with 1 namenode/jobtracker, 1 datanode, 1 secondary data node.
> > However, Keeping the config the same i just added a slave to the list in
> > the
> > conf/slaves files and tried running the cluster. This resulted in me
> > getting
> > permission denied when i put in the password for ssh in. The ssh
> > passwordless login is not working for some reason. its only the data
> nodes
> > that are giving trouble however, the secondary name node is starting up
> > without a hitch even though that pass is the last one to be entered.
> > Any ideas/suggestions anyone might have.
> >
> > Thanks
> >

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