Hi Siddharth, This is a very common error faced by users after formatting namenode. You need to clean up your dfs data directories across the cluster. This discussion will help you resolve this: http://search-hadoop.com/m/iAeEh1gvLE2/Incompatible+namepaceIDs&subj=RE+Incompatible+namespaceIDs+after+formatting+namenode
HTH, Anil On Sat, Sep 8, 2012 at 1:39 AM, Siddharth Tiwari <siddharth.tiw...@live.com>wrote: > Oh yes I did reformat namenode. Can you guide me on how to resolve this > issue ? > > > **------------------------** > *Cheers !!!* > *Siddharth Tiwari* > Have a refreshing day !!! > *"Every duty is holy, and devotion to duty is the highest form of worship > of God.” * > *"Maybe other people will try to limit me but I don't limit myself"* > > > ------------------------------ > From: serge.blazhiyevs...@nice.com > To: user@hadoop.apache.org > Date: Sat, 8 Sep 2012 02:32:08 -0600 > Subject: Re: Problem with one of teh datanodes > > > That's normally happen if yoiu reforemat namenode > > *From*: Siddharth Tiwari [mailto:siddharth.tiw...@live.com] > *Sent*: Saturday, September 08, 2012 02:05 AM > *To*: USers Hadoop <user@hadoop.apache.org> > *Subject*: Problem with one of teh datanodes > > Hi users, > > Suddenly I have started getting the following error on one of my > datanodes. Can you please help me on this. Also, what could be probable > cause and reasons for it to occur. > > ERROR org.apache.hadoop.hdfs.server.datanode.DataNode: > java.io.IOException: Incompatible namepaceIDs > > Thank you !!! > > > **------------------------** > *Cheers !!!* > *Siddharth Tiwari* > Have a refreshing day !!! > *"Every duty is holy, and devotion to duty is the highest form of worship > of God.” * > *"Maybe other people will try to limit me but I don't limit myself"* > -- Thanks & Regards, Anil Gupta
