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From praveenesh kumar <praveen...@gmail.com>
Subject Re: NameNode is starting with exceptions whenever its trying to start datanodes
Date Tue, 07 Jun 2011 18:19:50 GMT
how shall I clean my data dir ???
Cleaning data dir .. u mean to say is deleting all files from hdfs ???..

is there any special command to clean all the datanodes in one step ???

On Tue, Jun 7, 2011 at 11:46 PM, jagaran das <jagaran_das@yahoo.co.in>wrote:

> Cleaning data from data dir of datanode and formatting the name node may
> help
> you
>
>
>
>
> ________________________________
> From: praveenesh kumar <praveenesh@gmail.com>
> To: common-user@hadoop.apache.org
> Sent: Tue, 7 June, 2011 11:05:03 AM
>  Subject: Re: NameNode is starting with exceptions whenever its trying to
> start
> datanodes
>
> >>Sorry I mean Some of your data nodes are not  getting connected..
>
> So are you sticking with your solution that you are saying to me.. to go
> for
> passwordless ssh for all datanodes..
> because for my hadoop.. all datanodes are running fine....!!!!
>
>
>
> On Tue, Jun 7, 2011 at 11:32 PM, jagaran das <jagaran_das@yahoo.co.in
> >wrote:
>
> > Sorry I mean Some of your data nodes are not  getting connected
> >
> >
> >
> > ________________________________
> > From: jagaran das <jagaran_das@yahoo.co.in>
> > To: common-user@hadoop.apache.org
> > Sent: Tue, 7 June, 2011 10:45:59 AM
> >  Subject: Re: NameNode is starting with exceptions whenever its trying to
> > start
> > datanodes
> >
> > Check two things:
> >
> > 1. Some of your data node is getting connected, that means password less
> > SSH is
> > not working within nodes.
> > 2. Then Clear the Dir where you data is persisted in data nodes and
> format
> > the
> > namenode.
> >
> > It should definitely work then
> >
> > Cheers,
> > Jagaran
> >
> >
> >
> > ________________________________
> > From: praveenesh kumar <praveenesh@gmail.com>
> > To: common-user@hadoop.apache.org
> > Sent: Tue, 7 June, 2011 3:14:01 AM
> > Subject: Re: NameNode is starting with exceptions whenever its trying to
> > start
> > datanodes
> >
> > But I dnt have any data on my HDFS.. I was having some date before.. but
> > now
> > I deleted all the files from HDFS..
> > I dnt know why datanodes are taking time to start.. I guess because of
> this
> > exception its taking more time to start.
> >
> > On Tue, Jun 7, 2011 at 3:34 PM, Steve Loughran <stevel@apache.org>
> wrote:
> >
> > > On 06/07/2011 10:50 AM, praveenesh kumar wrote:
> > >
> > > The logs say
> > >
> > >
> > >  The ratio of reported blocks 0.9091 has not reached the threshold
> > 0.9990.
> > >> Safe mode will be turned off automatically.
> > >>
> > >
> > >
> > > not enough datanodes reported in, or they are missing data
> > >
> >
>

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