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From Arun C Murthy <...@hortonworks.com>
Subject Re: Problems of runing with yarn-2.0.X
Date Thu, 20 Jun 2013 06:59:04 GMT
Where are seeing the error? In the tasks? Or, during job submission?

On Jun 19, 2013, at 8:43 PM, Li Shengmei <lishengmei@ict.ac.cn> wrote:

> Hi, all
> 
>         I am doing some experiments with yarn-2.0.x. I found some problems
> as follows, can anyone give suggestion?
> 
> 
> 
> 1.       I set up hadoop environment with 2 nodes (1 as namenode ,1 as
> datanode). The application(wordcount) runs successfully.
> 
> 2.       I set up hadoop environment with 3 nodes or more(1 as namenode,
> others as datanodes). 
> 
> The application sometimes runs successfully, sometimes runs failed. The
> failed logs are
> 
> "Exception running child : java.net.ConnectException: Call From
> hadoop3.localdomain/10.3.1.63 to localhost:37497 failed on connection
> exception: java.net.ConnectException: Connection refused; For more details
> see:  http://wiki.apache.org/hadoop/ConnectionRefused"
> 
> 
> 
> I checked the configurations and firewall, there are no problems. I use the
> wordcount application in Hadoop examples, so the application is also OK.
> 
> 
> 
> Does anyone come across the problem? Any suggestions are welcome. Thanks a
> lot.
> 
> 
> 
> Shengmei
> 

--
Arun C. Murthy
Hortonworks Inc.
http://hortonworks.com/



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