title: Hadoop NameNode failed to start, Error: FSNamesystem initialization failed. java.io.FileNotFoundException
body: <p>Exception I am getting is,</p>
  
  <pre><code>2011-07-13 12:04:13,006 ERROR org.apache.hadoop.hdfs.server.namenode.NameNode: java.io.FileNotFoundException: File does not exist: /opt/data/tmp/mapred/system/job_201107041958_0120/j^@^@^@^@^@^@
          at org.apache.hadoop.hdfs.server.namenode.FSDirectory.unprotectedSetPermission(FSDirectory.java:544)
          at org.apache.hadoop.hdfs.server.namenode.FSEditLog.loadFSEdits(FSEditLog.java:724)
          at org.apache.hadoop.hdfs.server.namenode.FSImage.loadFSEdits(FSImage.java:992)
          at org.apache.hadoop.hdfs.server.namenode.FSImage.loadFSImage(FSImage.java:812)
          at org.apache.hadoop.hdfs.server.namenode.FSImage.recoverTransitionRead(FSImage.java:364)
          at org.apache.hadoop.hdfs.server.namenode.FSDirectory.loadFSImage(FSDirectory.java:87)
          at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.initialize(FSNamesystem.java:311)
          at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.&lt;init&gt;(FSNamesystem.java:292)
          at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:201)
          at org.apache.hadoop.hdfs.server.namenode.NameNode.&lt;init&gt;(NameNode.java:279)
          at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:956)
          at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:965)
  
  2011-07-13 14:45:02,780 ERROR org.apache.hadoop.hdfs.server.namenode.FSNamesystem: FSNamesystem initialization failed.
  java.io.FileNotFoundException: File does not exist: /opt/data/tmp/mapred/system/job_201107041958_0120/j^@^@^@^@^@^@
          at org.apache.hadoop.hdfs.server.namenode.FSDirectory.unprotectedSetPermission(FSDirectory.java:544)
          at org.apache.hadoop.hdfs.server.namenode.FSEditLog.loadFSEdits(FSEditLog.java:724)
          at org.apache.hadoop.hdfs.server.namenode.FSImage.loadFSEdits(FSImage.java:992)
          at org.apache.hadoop.hdfs.server.namenode.FSImage.loadFSImage(FSImage.java:812)
          at org.apache.hadoop.hdfs.server.namenode.FSImage.recoverTransitionRead(FSImage.java:364)
          at org.apache.hadoop.hdfs.server.namenode.FSDirectory.loadFSImage(FSDirectory.java:87)
          at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.initialize(FSNamesystem.java:311)
          at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.&lt;init&gt;(FSNamesystem.java:292)
          at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:201)
          at org.apache.hadoop.hdfs.server.namenode.NameNode.&lt;init&gt;(NameNode.java:279)
          at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:956)
          at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:965)
  </code></pre>