Re: Hadoop distributed mode

Mon, 06 Sep 2010 11:56:03 -0700

Nevermind. It was the default Fedora firewall that was configured. Disabled it and everything worked as it should. 

Thanks for the help

On 9/6/10 11:36 AM, Mark wrote:

 FYI I am running fedora 9. Anything I need to configure to allow access?

On 9/6/10 11:33 AM, Mark wrote:
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<qwertyman...@gmail.com> wrote: 


Mostly the conf or presence of a  firewall. Sometimes wrong interface
'listening'.

On 6 Sep 2010 23:48, "Mark"<static.void....@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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