title: Beeline/Hive/Hadoop stops (big delay) in a simple DESC-table command
body: <p>At Beeline shell, the command</p>
  
  <pre><code> DESC db.t
  </code></pre>
  
  <p>is, in normal conditions, <strong>fast</strong> (instantaneous) for any <em>Hive Managed table</em>. DESC is a pure-metadata-command, so I suppose that it depends only on Metastore (in our case Derby)...  Now, some days, perhaps with a lot of users, the command DESC  not respond, Beeline stops (waiting 2, 5 or more minutes).  Seems a "bug" in the infrastructure, <strong>it is a Derby problem?</strong> Any knowed/reported problem?</p>
  
  <hr>
  
  <p>Versions: Beeline 1.2 connected to Hive 1.2.1000.2 and Hadoop 2.7.3.</p>