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 <[email protected]> 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 <[email protected]> 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 > > >
