I have configured my machine as Pseudo-Distributed : I'm getting this error : *STARTUP_MSG: host = java.net.UnknownHostException: hadoop: hadoop
but i have given the host name as *"Hadoop-host" *in /etc/hosts * Here is the log file output =========================================================== 2008-10-04 18:02:46,717 INFO org.apache.hadoop.dfs.NameNode.Secondary: STARTUP_MSG: /************************************************************ STARTUP_MSG: Starting SecondaryNameNode STARTUP_MSG: host = java.net.UnknownHostException: hadoop: hadoop STARTUP_MSG: args = [] STARTUP_MSG: version = 0.18.0 STARTUP_MSG: build = http://svn.apache.org/repos/asf/hadoop/core/branches/branch-0.18 -r 686010; compiled by 'hadoopqa' on Thu Aug 14 19:48:33 UTC 2008 ************************************************************/ 2008-10-04 18:02:46,815 INFO org.apache.hadoop.metrics.jvm.JvmMetrics: Initializing JVM Metrics with processName=SecondaryNameNode, sessionId=null 2008-10-04 18:02:46,829 INFO org.apache.hadoop.util.MetricsUtil: Unable to obtain hostName java.net.UnknownHostException: hadoop: hadoop at java.net.InetAddress.getLocalHost(InetAddress.java:1353) at org.apache.hadoop.metrics.MetricsUtil.getHostName(MetricsUtil.java:86) at org.apache.hadoop.metrics.MetricsUtil.createRecord(MetricsUtil.java:75) at org.apache.hadoop.metrics.jvm.JvmMetrics.<init>(JvmMetrics.java:77) at org.apache.hadoop.metrics.jvm.JvmMetrics.init(JvmMetrics.java:69) at org.apache.hadoop.dfs.SecondaryNameNode.initialize(SecondaryNameNode.java:120) at org.apache.hadoop.dfs.SecondaryNameNode.<init>(SecondaryNameNode.java:108) at org.apache.hadoop.dfs.SecondaryNameNode.main(SecondaryNameNode.java:460) 2008-10-04 18:02:47,005 WARN org.apache.hadoop.dfs.Storage: Checkpoint directory /tmp/hadoop-hadoop/dfs/namesecondary is added. 2008-10-04 18:02:47,092 INFO org.mortbay.util.Credential: Checking Resource aliases 2008-10-04 18:02:47,146 INFO org.mortbay.http.HttpServer: Version Jetty/5.1.4 2008-10-04 18:02:47,148 INFO org.mortbay.util.Container: Started HttpContext[/static,/static] 2008-10-04 18:02:47,148 INFO org.mortbay.util.Container: Started HttpContext[/logs,/logs] 2008-10-04 18:02:47,616 INFO org.mortbay.jetty.servlet.XMLConfiguration: No WEB-INF/web.xml in file:/home/hadoop/Hadoop/hadoop-0.18.0/webapps/secondary. Serving files and default/dynamic servlets only 2008-10-04 18:02:47,618 INFO org.mortbay.util.Container: Started [EMAIL PROTECTED] 2008-10-04 18:02:47,669 INFO org.mortbay.util.Container: Started WebApplicationContext[/,/] 2008-10-04 18:02:47,672 INFO org.mortbay.http.SocketListener: Started SocketListener on 0.0.0.0:50090 2008-10-04 18:02:47,672 INFO org.mortbay.util.Container: Started [EMAIL PROTECTED] 2008-10-04 18:02:47,672 INFO org.apache.hadoop.dfs.NameNode.Secondary: Secondary Web-server up at: 0.0.0.0:50090 2008-10-04 18:02:47,672 WARN org.apache.hadoop.dfs.NameNode.Secondary: Checkpoint Period :3600 secs (60 min) 2008-10-04 18:02:47,672 WARN org.apache.hadoop.dfs.NameNode.Secondary: Log Size Trigger :67108864 bytes (65536 KB) 2008-10-04 18:05:33,896 INFO org.apache.hadoop.dfs.NameNode.Secondary: SHUTDOWN_MSG: /************************************************************ SHUTDOWN_MSG: Shutting down SecondaryNameNode at java.net.UnknownHostException: hadoop: hadoop ************************************************************/
