Cleaning data from data dir of datanode and formatting the name node may help you
________________________________ From: praveenesh kumar <praveen...@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_...@yahoo.co.in>wrote: > Sorry I mean Some of your data nodes are not getting connected > > > > ________________________________ > From: jagaran das <jagaran_...@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 <praveen...@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 <ste...@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 > > >
