Hi yogesh,
Do as suggested by bejoy and add the hadoop.tmp.dir in your
core-site.xml file.it's value defaults to the /tmp dir which gets emptied
at each restart so all the data is lost... also add dfs.name.dir and
dfs.data.dir properties into your hdfs-site.xml file to avoid the data loss.
On Friday, July 20, 2012, Bejoy KS <bejoy.had...@gmail.com> wrote:
> Hi Yogesh
>
> Is your dfs.name.dir pointing to /tmp dir? If so try changing that to any
other dir . The contents of /tmp may get wiped out on OS restarts.
> Regards
> Bejoy KS
>
> Sent from handheld, please excuse typos.
> ________________________________
> From: <yogesh.kuma...@wipro.com>
> Date: Fri, 20 Jul 2012 06:20:02 +0000
> To: <hdfs-user@hadoop.apache.org>
> ReplyTo: hdfs-user@hadoop.apache.org
> Subject: NameNode fails
> Hello All :-),
>
> I am new to Hdfs.
>
> I have installed single node hdfs and started all nodes, every nodes gets
started and work fine.
> But when I shutdown my system or Restart it, then i try to run all nodes
but Namenode doesn't start .
>
> to Start it i need to format the namenode and all data gets wash off :-(.
>
> Please help me and suggest me regarding this and how can I recover
namenode from secondary name node on single node setup
>
>
> Thanks & Regards
> Yogesh Kumar Dhari
>
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