Hi Hemant, Its the content of core-site.xml
<configuration> <property> <name>fs.default.name</name> <value>hdfs://localhost:9000</value> </property> <property> <name>hadoop.tmp.dir</name> <value>/opt/hadoop-0.20.2/hadoop_temporary_dirr</value> <description>A base for other temporary directories.</description> </property> </configuration> Regards Yogesh Kumar Date: Tue, 11 Sep 2012 21:29:36 +0530 Subject: Re: Error in : hadoop fsck / From: yhema...@thoughtworks.com To: user@hadoop.apache.org Could you please review your configuration to see if you are pointing to the right namenode address ? (This will be in core-site.xml)Please paste it here so we can look for clues. Thanks hemanth On Tue, Sep 11, 2012 at 9:25 PM, yogesh dhari <yogeshdh...@live.com> wrote: Hi all, I am running hadoop-0.20.2 on single node cluster, I run the command hadoop fsck / it shows error: Exception in thread "main" java.net.UnknownHostException: http at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:178) at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:391) at java.net.Socket.connect(Socket.java:579) at java.net.Socket.connect(Socket.java:528) at sun.net.NetworkClient.doConnect(NetworkClient.java:180) at sun.net.www.http.HttpClient.openServer(HttpClient.java:378) at sun.net.www.http.HttpClient.openServer(HttpClient.java:473) at sun.net.www.http.HttpClient.<init>(HttpClient.java:203) at sun.net.www.http.HttpClient.New(HttpClient.java:290) at sun.net.www.http.HttpClient.New(HttpClient.java:306) at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:995) at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:931) at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:849) at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1299) at org.apache.hadoop.hdfs.tools.DFSck.run(DFSck.java:123) at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65) at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:79) at org.apache.hadoop.hdfs.tools.DFSck.main(DFSck.java:159) Please suggest why it so.. it should show the health status: