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
