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Date: Fri, 24 Aug 2012 14:27:53 +0530
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Subject: Re: Live nodes count not incremented with the addition of new nodes
From: iwannaplay games <funnlearnforkids@gmail.com>
To: user@hadoop.apache.org
Content-Type: text/plain; charset=ISO-8859-1

yeah installation is proper but it seems they are sharing the same storage id'
Do i need to make any change in slaves configuration.I have copied the
slaves image on other nodes.
Check this log file:
2012-08-24 19:46:18,179 INFO org.apache.hadoop.net.NetworkTopology:
Adding a new node: /default-rack/192.168.0.190:50010
2012-08-24 19:46:18,188 INFO org.apache.hadoop.hdfs.StateChange:
*BLOCK* NameNode.blocksBeingWrittenReport: from 192.168.0.190:50010 0
blocks
2012-08-24 19:46:18,215 INFO org.apache.hadoop.hdfs.StateChange:
*BLOCK* NameSystem.processReport: from 192.168.0.190:50010, blocks: 0,
processing time: 1 msecs
2012-08-24 19:46:18,276 INFO org.apache.hadoop.hdfs.StateChange:
BLOCK* NameSystem.registerDatanode: node registration from
192.168.0.122:50010 storage
DS-2050366683-192.168.0.122-50010-1344447057014
2012-08-24 19:46:18,276 INFO org.apache.hadoop.hdfs.StateChange:
BLOCK* NameSystem.registerDatanode: node 192.168.0.190:50010 is
replaced by 192.168.0.122:50010 with the same storageID
DS-2050366683-192.168.0.122-50010-1344447057014
2012-08-24 19:46:18,276 INFO org.apache.hadoop.net.NetworkTopology:
Removing a node: /default-rack/192.168.0.190:50010
2012-08-24 19:46:18,276 INFO org.apache.hadoop.net.NetworkTopology:
Adding a new node: /default-rack/192.168.0.122:50010


Why with another node registration previous node is removed?

Regards
Prabhjot

On Thu, Aug 23, 2012 at 7:24 PM, Harsh J <harsh@cloudera.com> wrote:
>
> I'd first check if your additional nodes came up fine (check the
> services' logs) and connected to the master alright.
>
> On Thu, Aug 23, 2012 at 7:18 PM, iwannaplay games
> <funnlearnforkids@gmail.com> wrote:
> >
> >
> > Hi
> >
> > I had a 2 node cluster earlier.I added 2 nodes on the fly in hadoop cluster.
> >
> > Ran these commands
> > hadoop dfsadmin -refreshNodes
> > hadoop mradmin -refreshNodes
> >
> > But still when i check through fsck or http://master:50070
> > i get only 2 live nodes,one master and one slave(out of 3 slaves,randomly it
> > picks anyone)
> >
> > Can anybody tell me why its not updating the count of live nodes to 4.
> >
> > Regards
> > Prabhjot
> >
>
>
>
> --
> Harsh J