title: Unable to add a datanode to Hadoop
body: <p>I got all my settings right and I am able to run <code>Hadoop ( 1.1.2 )</code> on a single-Node. However, after making the changes to the relevant files ( /etc/hosts, *-site.xml ), I am not able to add a <strong>Datanode</strong> to the cluster and I keep getting the following error on the Slave. </p>
  
  <p>Anybody knows how to rectify this?</p>
  
  <pre><code>2013-05-13 15:36:10,135 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: localhost/127.0.0.1:54310. Already tried 3 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
  2013-05-13 15:36:11,137 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: localhost/127.0.0.1:54310. Already tried 4 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
  2013-05-13 15:36:12,140 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: localhost/127.0.0.1:54310. Already tried 5 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
  </code></pre>