if you want to use master as your hostname then make such entry in your
/etc/hosts file
or change the hdfs://master to hdfs://localhost
On Sun, Feb 24, 2013 at 5:10 PM, Sai Sai <saigr...@yahoo.in> wrote:
>
> Greetings,
>
> Below is the program i am trying to run and getting this exception:
> ***************************************
> Test Start.....
> java.net.UnknownHostException: unknown host: master
> at org.apache.hadoop.ipc.Client$Connection.<init>(Client.java:214)
> at org.apache.hadoop.ipc.Client.getConnection(Client.java:1196)
> at org.apache.hadoop.ipc.Client.call(Client.java:1050)
> at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:225)
> at $Proxy1.getProtocolVersion(Unknown Source)
> at org.apache.hadoop.ipc.RPC.getProxy(RPC.java:396)
> at org.apache.hadoop.ipc.RPC.getProxy(RPC.java:379)
> at
> org.apache.hadoop.hdfs.DFSClient.createRPCNamenode(DFSClient.java:119)
> at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:238)
> at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:203)
> at
> org.apache.hadoop.hdfs.DistributedFileSystem.initialize(DistributedFileSystem.java:89)
> at kelly.hadoop.hive.test.HadoopTest.main(HadoopTest.java:54)
>
>
> ********************
>
> public class HdpTest {
>
> public static String fsURI = "hdfs://master:9000";
>
>
> public static void copyFileToDFS(FileSystem fs, String srcFile,
> String dstFile) throws IOException {
> try {
> System.out.println("Initialize copy...");
> URI suri = new URI(srcFile);
> URI duri = new URI(fsURI + "/" + dstFile);
> Path dst = new Path(duri.toString());
> Path src = new Path(suri.toString());
> System.out.println("Start copy...");
> fs.copyFromLocalFile(src, dst);
> System.out.println("End copy...");
> } catch (Exception e) {
> e.printStackTrace();
> }
> }
>
> public static void main(String[] args) {
> try {
> System.out.println("Test Start.....");
> Configuration conf = new Configuration();
> DistributedFileSystem fs = new DistributedFileSystem();
> URI duri = new URI(fsURI);
> fs.initialize(duri, conf); // Here is the xception occuring
> long start = 0, end = 0;
> start = System.nanoTime();
> //writing data from local to HDFS
> copyFileToDFS(fs, "/home/kosmos/Work/input/wordpair.txt",
> "/input/raptor/trade1.txt");
> //Writing data from HDFS to Local
> // copyFileFromDFS(fs, "/input/raptor/trade1.txt",
> "/home/kosmos/Work/input/wordpair1.txt");
> end = System.nanoTime();
> System.out.println("Total Execution times: " + (end - start));
> fs.close();
> } catch (Throwable t) {
> t.printStackTrace();
> }
> }
> ******************************
> I am trying to access in FireFox this url:
> hdfs://master:9000
>
> Get an error msg FF does not know how to display this message.
>
> I can successfully access my admin page:
>
> http://localhost:50070/dfshealth.jsp
>
> Just wondering if anyone can give me any suggestions, your help will be
> really appreciated.
> Thanks
> Sai
>
>
--
Nitin Pawar
