title: dfs.namenode.servicerpc-address or dfs.namenode.rpc-address is not configured
body: <p>I was trying to configure hadoop with one name node and four data nodes.  I was able to successfully configure the name node and job tracker on one machine and bring it up.</p>
  
  <p>But on my machine where the data node is to be configured I did the following:</p>
  
  <ul>
  <li>I unzipped the <code>hadoop-2.0.0-cdh4.1.2.tar.gz</code> and <code>mr1-2.0.0-mr1-cdh4.1.2.tar.gz</code> into a folder and set up the configuration with master and slave.</li>
  <li>In the <code>master</code> file I had set up the ip address of machine that was configured to be the name node.</li>
  <li>In the slave machine I set up the ip address of my machine where I had unzipped the tar balls.</li>
  </ul>
  
  <p>When I try to start the data node with the command </p>
  
  <pre><code>hdfs datanode
  </code></pre>
  
  <p>I get this error:</p>
  
  <pre><code>java.io.IOException: Incorrect configuration: namenode address dfs.namenode.servicerpc-address or dfs.namenode.rpc-address is not configured.
  </code></pre>
  
  <p>What do I need to do?</p>