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From VIGNESH PRAJAPATI <vignesh2...@gmail.com>
Subject Re: NameNode fails
Date Fri, 20 Jul 2012 06:50:43 GMT
And avoid formatting namenode while your cluster is running for safety of
data in hdfs.

On Fri, Jul 20, 2012 at 2:47 AM, Mohammad Tariq <dontariq@gmail.com> wrote:

> 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.hadoop@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.kumar13@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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> --
> Regards,
>     Mohammad Tariq
>
>


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