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From Mark <static.void....@gmail.com>
Subject Re: Hadoop distributed mode
Date Mon, 06 Sep 2010 18:33:06 GMT
  pinging the master-hadoop from the datanode resolves fine however if I 
try to curl master-hadoop:50070 from the datanodes I get "curl: (7) 
couldn't connect to host"

On 9/6/10 11:26 AM, Ranjib Dey wrote:
> 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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