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From Saurabh Jain <Saurabh_J...@symantec.com>
Subject Problem accessing HDFS from a remote machine
Date Mon, 08 Apr 2013 14:29:52 GMT
Hi All,

I have setup a single node cluster(release hadoop-1.0.4). Following is the configuration used
-

core-site.xml :-

<property>
     <name>fs.default.name</name>
     <value>hdfs://localhost:54310</value>
</property>

masters:-
localhost

slaves:-
localhost

I am able to successfully format the Namenode and perform files system operations by running
the CLIs on Namenode.

But I am receiving following error when I try to access HDFS from a remote machine -

$ bin/hadoop fs -ls /
Warning: $HADOOP_HOME is deprecated.

13/04/08 07:13:56 INFO ipc.Client: Retrying connect to server: 10.209.10.206/10.209.10.206:54310.
Already tried 0 time(s).
13/04/08 07:13:57 INFO ipc.Client: Retrying connect to server: 10.209.10.206/10.209.10.206:54310.
Already tried 1 time(s).
13/04/08 07:13:58 INFO ipc.Client: Retrying connect to server: 10.209.10.206/10.209.10.206:54310.
Already tried 2 time(s).
13/04/08 07:13:59 INFO ipc.Client: Retrying connect to server: 10.209.10.206/10.209.10.206:54310.
Already tried 3 time(s).
13/04/08 07:14:00 INFO ipc.Client: Retrying connect to server: 10.209.10.206/10.209.10.206:54310.
Already tried 4 time(s).
13/04/08 07:14:01 INFO ipc.Client: Retrying connect to server: 10.209.10.206/10.209.10.206:54310.
Already tried 5 time(s).
13/04/08 07:14:02 INFO ipc.Client: Retrying connect to server: 10.209.10.206/10.209.10.206:54310.
Already tried 6 time(s).
13/04/08 07:14:03 INFO ipc.Client: Retrying connect to server: 10.209.10.206/10.209.10.206:54310.
Already tried 7 time(s).
13/04/08 07:14:04 INFO ipc.Client: Retrying connect to server: 10.209.10.206/10.209.10.206:54310.
Already tried 8 time(s).
13/04/08 07:14:05 INFO ipc.Client: Retrying connect to server: 10.209.10.206/10.209.10.206:54310.
Already tried 9 time(s).
Bad connection to FS. command aborted. exception: Call to 10.209.10.206/10.209.10.206:54310
failed on connection exception: java.net.ConnectException: Connection refused

Where 10.209.10.206 is the IP of the server hosting the Namenode and it  is also the configured
value for "fs.default.name" in the core-site.xml file on the remote machine.

Executing 'bin/hadoop fs -fs hdfs://10.209.10.206:54310 -ls /' also result in same output.

Also, I am writing a C application using libhdfs to communicate with HDFS. How do we provide
credentials while connecting to HDFS?

Thanks
Saurabh



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