Hello, It is nice to know the issue occurring consistently. According to the log file, the namenode/master (M) has problem reaching to datanode/slave (S) auriga. Does ssh from M to S work? i.e. does M$> ssh [EMAIL PROTECTED] directly return a command prompt on S as user jaya? If not, at least, we know there is some issue on network side. One like Arun indicating, dns service is not functioning normally. One simple (coward) solution is to use only ip addresses. This way could simplify the setup configurations.
Best Regards Richard Yang [EMAIL PROTECTED] [EMAIL PROTECTED] -----Original Message----- From: Arun C Murthy [mailto:[EMAIL PROTECTED] Sent: Friday, March 23, 2007 3:33 AM To: [email protected] Subject: Re: System is hanging while executing bin/start-all.sh and bin/stop-all.sh jaylac wrote: > hi richard > > My system is hanging always.. this is not a rare event for me. > I cant trace out what i the problem.... please help me... > > Following are log files... > > Here auriga is the name of thre slave node. > > In the slave node > > 2007-03-23 14:37:56,108 ERROR org.apache.hadoop.mapred.TaskTracker: Can not > start task trackerbecause java.net.UnknownHostException: auriga: auriga > at java.net.InetAddress.getLocalHost(InetAddress.java:1315) > at org.apache.hadoop.net.DNS.getDefaultHost(DNS.java:169) > ============================================================================ = > > hadoop-jaya-datanode-auriga.log file > --------------------------------------------------------- > 2007-03-23 14:37:54,248 ERROR org.apache.hadoop.dfs.DataNode: > java.net.UnknownHostException: auriga: auriga > at java.net.InetAddress.getLocalHost(InetAddress.java:1315) > at org.apache.hadoop.dfs.DataNode.<init>(DataNode.java:178) It looks like a dns issue; please check with your sysadmin. What does $ host auriga say? Arun
