title: index server and statistics server not starting in hana
body: <p>In sap hana index server and statistics server stopped suddenly and not running.
  I tried to stop and restart the server by the following commands.</p>
  
  <pre><code> HDB stop 
   HDB start
  </code></pre>
  
  <p>But still it is not working. Does anyone know what causes this problem and what is the solution? Thanks in advance.</p>