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From Ranjib Dey <ranj...@thoughtworks.com>
Subject Re: Hadoop distributed mode
Date Mon, 06 Sep 2010 18:26:59 GMT
ya, firewall is the most common issue. apart from that take a look at the
namenode log too..just to make sure that its running without any error. try
to ping the master-hadoop from the data node, to check if they are
resolvable. If not try with the ip:50070

On Mon, Sep 6, 2010 at 11:51 PM, Harsh J <qwertymaniac@gmail.com> wrote:

> Mostly the conf or presence of a  firewall. Sometimes wrong interface
> 'listening'.
>
> On 6 Sep 2010 23:48, "Mark" <static.void.dev@gmail.com> wrote:
>
>  I am trying to configure out distributed Hadoop setup but for some reason
> my datanodes can not connect to the namenode.
>
> 2010-09-06 04:06:05,040 INFO org.apache.hadoop.ipc.Client: Retrying connect
> to server: /10.101.102.11:9000. Already tried 0 time(s).
> 2010-09-06 04:06:06,041 INFO org.apache.hadoop.ipc.Client: Retrying connect
> to server: /10.101.102.11:9000. Already tried 1 time(s).
> 2010-09-06 04:06:07,042 INFO org.apache.hadoop.ipc.Client: Retrying connect
> to server: /10.101.102.11:9000. Already tried 2 time(s).
> 2010-09-06 04:06:08,042 INFO org.apache.hadoop.ipc.Client: Retrying connect
> to server: /10.101.102.11:9000. Already tried 3 time(s).
> 2010-09-06 04:06:09,043 INFO org.apache.hadoop.ipc.Client: Retrying connect
> to server: /10.101.102.11:9000. Already tried 4 time(s).
> 2010-09-06 04:06:10,043 INFO org.apache.hadoop.ipc.Client: Retrying connect
> to server: /10.101.102.11:9000. Already tried 5 time(s).
> 2010-09-06 04:06:11,044 INFO org.apache.hadoop.ipc.Client: Retrying connect
> to server: /10.101.102.11:9000. Already tried 6 time(s).
> 2010-09-06 04:06:12,044 INFO org.apache.hadoop.ipc.Client: Retrying connect
> to server: /10.101.102.11:9000. Already tried 7 time(s).
> 2010-09-06 04:06:13,045 INFO org.apache.hadoop.ipc.Client: Retrying connect
> to server: /10.101.102.11:9000. Already tried 8 time(s).
> 2010-09-06 04:06:14,045 INFO org.apache.hadoop.ipc.Client: Retrying connect
> to server: /10.101.102.11:9000. Already tried 9 time(s).
> 2010-09-06 04:06:14,048 ERROR
> org.apache.hadoop.hdfs.server.datanode.DataNode: java.io.IOException: Call
> to /10.101.102.11:9000 failed on local exception:
> java.net.NoRouteToHostException: No route to host
>
> I also can't connect to master-hadoop:50070 or master-hadoop:50030 from any
> other machine but the master/name node. Any ideas why this may be
> happening?
>
> Thanks.
>

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