title: HDFS Safe mode issue
body: <p>I am facing an issue with HDFS. Error is given below:</p>
  
  <blockquote>
    <p>Problem accessing /nn_browsedfscontent.jsp. Reason:</p>
    
    <p>Cannot issue delegation token. Name node is in safe mode.The reported
    blocks 428 needs additional 2 blocks to reach the threshold 0.9990 of
    total blocks 430. Safe mode will be turned off automatically.</p>
  </blockquote>
  
  <p>I even tried to leave safe mode using the command. But I am getting superuser privilege issue, even if I tried as the root user. I am using CDH 4.</p>
  
  <p>Can any one let me know why this is happening and how to over come from this?</p>