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Re: Dynamically adding nodes in Hadoop
Hi,

in the slave - file too. /etc/hosts is also recommend to avoid DNS
issues. After adding in slaves the new node has to be started and
should quickly appear in the web-ui. If you don't need the nodes all
time you can setup a exclude and refresh your cluster
(http://wiki.apache.org/hadoop/FAQ#I_want_to_make_a_large_cluster_smaller_by_taking_out_a_bunch_of_nodes_simultaneously._How_can_this_be_done.3F)

- Alex

On Sat, Dec 17, 2011 at 12:06 PM, madhu phatak <[EMAIL PROTECTED]> wrote:
> Hi,
>  I am trying to add nodes dynamically to a running hadoop cluster.I started
> tasktracker and datanode in the node. It works fine. But when some node
> try fetch values ( for reduce phase) it fails with unknown host exception.
> When i add a node to running cluster do i have to add its hostname to all
> nodes (slaves +master) /etc/hosts file? Or some other way is there?
>
>
> --
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Alexander Lorenz
http://mapredit.blogspot.com

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