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From rishi pathak <mailmaverick...@gmail.com>
Subject Re: cannot connect from slaves
Date Fri, 14 Jan 2011 04:44:38 GMT
Hello,
                It can be a firewall issue. Try telnet from master and from
slaves and see:

(master)# telnet master 8020

and
(slave)# telnet master 8020


On Fri, Jan 14, 2011 at 8:19 AM, Mark Kerzner <markkerzner@gmail.com> wrote:

> I did this, and tried both ways:
>
> hadoop fs -ls /
> 11/01/14 02:45:25 INFO ipc.Client: Retrying connect to server: /
> 10.113.118.244:8020. Already tried 0 time(s).
> 11/01/14 02:45:29 INFO ipc.Client: Retrying connect to server: /
> 10.113.118.244:8020. Already tried 1 time(s).
>
> and
>
> hadoop fs -ls hdfs://10.113.118.244/
> 11/01/14 02:48:56 INFO ipc.Client: Retrying connect to server: /
> 10.113.118.244:8020. Already tried 0 time(s).
>
> I am suspecting the port 8020 - how do I test it outside of hadoop?
>
> Thank you,
> Mark
>
> On Thu, Jan 13, 2011 at 8:29 PM, George Datskos <
> george.datskos@jp.fujitsu.com> wrote:
>
> > Hello
> >
> >
> > On 2011/01/14 10:02, Mark Kerzner wrote:
> >
> >> hadoop fs -ls hdfs://master-url/
> >>
> >> works locally on the master, but cannot connect from any of the slaves.
> >>
> >
> > Make sure to replicate conf/core-site.xml to each of the slaves.  The
> > fs.default.name property should point to the master node.  That way the
> > slaves know how to reach the NameNode.
> >
> >  <name>fs.default.name</name>
> >  <value>hdfs://master:8020</value>
> >
> >
> > (adjust the host name and port as necessary)
> >
> >
> > George
> >
> >
>



-- 
Regards--
Rishi Pathak
National PARAM Supercomputing Facility
Center for Development of Advanced Computing(C-DAC)
Pune University Campus,Ganesh Khind Road
Pune-Maharastra

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