title: Found unsupported keytype (8) for Principal
body: <p>I am using Java 7 and Kerberos to authenticate hadoop.</p>
  
  <p>In the debug log I am seeing the following error:</p>
  
  <pre><code>Ordering keys wrt default_tkt_enctypes list
  default etypes for default_tkt_enctypes: 23 18 17 16 3 1.
  Added key: 3version: 1
  **Found unsupported keytype (8) for hdfs/aaa.aaa@EXAMPLE.COM**
  Added key: 23version: 1
  Added key: 16version: 1
  Added key: 17version: 1
  Added key: 18version: 1
  </code></pre>
  
  <p>How to correct this error?</p>