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MapReduce >> mail # user >> rack topology data update


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Re: rack topology data update
Hi Jameson,

If the NameNode has cached the wrong value earlier, it will not
refresh that until you restart it.

On Thu, Sep 13, 2012 at 11:21 AM, Jameson Li <[EMAIL PROTECTED]> wrote:
> Hi harsh,
>
> I have followed your suggestion operation.
>
> 1, stop the new datanode.(I have modified the topology file in the namenode
> before.)
> 2, run 'hadoop dfsadmin -refreshNodes' on the namenode
> 3, start the new datanode.
>
> But it really not update the new topology mapping.
> It just show the start info in the namenode that:
> "
> 2012-09-13 13:44:14,706 INFO org.apache.hadoop.net.NetworkTopology: Removing
> a node: /default-rack/10.0.10.100:50010
> 2012-09-13 13:44:14,706 INFO org.apache.hadoop.net.NetworkTopology: Adding a
> new node: /default-rack/10.0.10.100:50010
> "
>
>
> 专注于Mysql,MSSQL,Oracle,Hadoop
>
>
>
> 2012/9/13 Harsh J <[EMAIL PROTECTED]>
>>
>> the DN only after (2) so it picks up the right mapping an
>
>