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________________________________
From: Yang Xiaoliang <yangxiaoliang2006@gmail.com>
To: hdfs-user@hadoop.apache.org
Sent: Sunday, May 22, 2011 7:23 AM
Subject: FileSystemCat ipc.Client: Retrying connect to server:
Hi All,
I am just reading the book *Hadoop: The Definitive Guide *by Tom White,
there is an example for the *FileSystem* class in chapter 3,
example3-2:
------------------------------------------------------------------------------------------
public class FileSystemCat {
import java.io.InputStream;
import java.net.URI;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.IOUtils;
public static void main(String[] args) throws Exception {
String uri = args[0];
Configuration conf = new Configuration();
FileSystem fs = FileSystem.get(URI.create(uri), conf);
InputStream in = null;
try {
in = fs.open(new Path(uri));
IOUtils.copyBytes(in, System.out, 4096, false);
} finally {
IOUtils.closeStream(in);
}
}
}
---------------------------------------------------------------------------------------------
I run the program as follows:
% export HADOOP_CLASSPATH=.
% hadoop FileSystem.Cat
hdfs://localhost/user/hadoop-user/input/mapred-site.xml
and then, what i got was as fllows:
ipc.Client: Retrying connect to server: localhost/127.0.0.1:8020. Already
tried 0 time(s).
11/05/22 20:45:53 INFO ipc.Client: Retrying connect to server: localhost/
127.0.0.1:8020. Already tried 1 time(s).
11/05/22 20:45:53 INFO ipc.Client: Retrying connect to server: localhost/
127.0.0.1:8020. Already tried 1 time(s).
11/05/22 20:45:54 INFO ipc.Client: Retrying connect to server: localhost/
127.0.0.1:8020. Already tried 2 time(s).
....................................
can anyone help?
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