Sandeep

P.S. - Master and slave running same version of Linux and Hadoop and SSH is working perfectly,
because I can start the slave from master node

Also Same settings for core-site.xml, hdfs-site.xml and mapred-site.xml on master(hadooopnode1) and 
slave (hadoopnode2)

OS - UBuntu 10
Hadoop Version - 
oop@hadoopnode1:~/hadoop-0.20.2/conf$ hadoop version
Hadoop 0.20.2
Subversion https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.20 -r 911707
Compiled by chrisdo on Fri Feb 19 08:07:34 UTC 2010

-- Master (hadoopnode1)

hadoop@hadoopnode1:~/hadoop-0.20.2/conf$ uname -a
Linux hadoopnode1 2.6.35-32-generic #67-Ubuntu SMP Mon Mar 5 19:35:26 UTC 2012 i686 GNU/Linux

hadoop@hadoopnode1:~/hadoop-0.20.2/conf$ jps
9923 Jps
7555 NameNode
8133 TaskTracker
7897 SecondaryNameNode
7728 DataNode
7971 JobTracker

masters -> hadoopnode1
slaves -> hadoopnode1
hadoopnode2

--Slave (hadoopnode2)
<code>
hadoop@hadoopnode2:~/hadoop-0.20.2/conf$ uname -a
Linux hadoopnode2 2.6.35-32-generic #67-Ubuntu SMP Mon Mar 5 19:35:26 UTC 2012 i686 GNU/Linux

hadoop@hadoopnode2:~/hadoop-0.20.2/conf$ jps
1959 DataNode
2631 Jps
2108 TaskTracker

masters - hadoopnode1

core-site.xml
hadoop@hadoopnode2:~/hadoop-0.20.2/conf$ cat core-site.xml



<!-- Put site-specific property overrides in this file. -->


        
                hadoop.tmp.dir
                /var/tmp/hadoop/hadoop-${user.name}
                A base for other temp directories
        

        
                fs.default.name
                hdfs://hadoopnode1:8020
                The name of the default file system
        



hadoop@hadoopnode2:~/hadoop-0.20.2/conf$ cat mapred-site.xml



<!-- Put site-specific property overrides in this file. -->


        
                mapred.job.tracker
                hadoopnode1:8021
                The host and port that the MapReduce job tracker runs at.If "local", then jobs are run in process as a single map
        



hadoop@hadoopnode2:~/hadoop-0.20.2/conf$ cat hdfs-site.xml



<!-- Put site-specific property overrides in this file. -->


        
                dfs.replication
                2
                Default block replication