title: Starting cassandra as a service does not work for 2.0.5, sudo cassandra -f works
body: <p>When I try to start cassandra on ubuntu 12.04 (installed via Datastax's <code>dsc20</code> package) as a service as follows :</p>
  
  <blockquote>
    <p>$ sudo service cassandra start</p>
  </blockquote>
  
  <p>it says </p>
  
  <blockquote>
    <p>*could not access pidfile for Cassandra</p>
  </blockquote>
  
  <p>&amp; no other messages or anything in logs. </p>
  
  <p>But when I try to run as a root user( <code>sudo cassandra -f</code>) it just works properly &amp; cassandra is started. While trying to debug I found that when trying to run <em>as a non-root user</em>  I was getting these messages:</p>
  
  <pre><code>ERROR 17:48:08,432 Exception encountered during startup
  java.lang.AssertionError: Directory /var/lib/cassandra/data is not accessible.
  ..
  java.io.FileNotFoundException: /var/log/cassandra/system.log (Permission denied)
  ..
  java.lang.AssertionError: Directory /var/lib/cassandra/data is not accessible.
  </code></pre>
  
  <p>Is there some problem with the packaging ? Not properly installed/ configured by package ?? </p>