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From Saurabh bhutyani <s4saur...@gmail.com>
Subject Re: rack topology data update
Date Thu, 13 Sep 2012 06:22:51 GMT
I believe running the following command on namenode should refresh it.

'hadoop dfsadmin -refreshNodes'

Thanks & Regards,
Saurabh Bhutyani

Call  : 9820083104
Gtalk: s4saurabh@gmail.com



On Thu, Sep 13, 2012 at 11:25 AM, Viji R <viji@cloudera.com> wrote:

> 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 <hovlj.ei@gmail.com> 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 <harsh@cloudera.com>
> >>
> >> the DN only after (2) so it picks up the right mapping an
> >
> >
>

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