title: NameNode shuts down itself after starting the hadoop
body: <p>I have installed <strong>hadoop 1.2.1</strong> on linux with single node cluster configuration. It was running fine and the <code>jps</code> command was displaying the information of all 5 jobs</p>
  
  <ul>
  <li>JobTracker</li>
  <li>NameNode</li>
  <li>TaskTracker</li>
  <li>SecondaryNameNode</li>
  <li>jps</li>
  <li>DataNode.`</li>
  </ul>
  
  <p>Now, when I start the hadoop using command <code>bin/start-all.sh</code>, hadoop starts all 5 jobs but within few seconds namenode shuts down itself.</p>
  
  <p>Any ideas how can I solve this issue?</p>
  
  <p>I have checked the namenode log file and it shows the following error:</p>
  
  <pre><code> ERROR org.apache.hadoop.hdfs.server.namenode.NameNode: java.io.IOException: Edit log corruption detected: corruption length = 98362 &gt; toleration length = 0; the corruption is intolerable.
  </code></pre>