title: Dataproc adding extra field when adding keys using --properties?
body: <p>I am trying to update or add new fields to hive config in dataproc cluster using --properties field. I am running dataproc cluster command from cloud shell. What i am seeing is dataproc is adding new key with final. I am unable to find what it means?</p>
  
  <pre><code>  &lt;property&gt;
      &lt;name&gt;hive.compactor.worker.threads&lt;/name&gt;
      &lt;value&gt;1&lt;/value&gt;
      &lt;final&gt;false&lt;/final&gt;
      &lt;source&gt;Dataproc Cluster Properties&lt;/source&gt;
    &lt;/property&gt;
  </code></pre>
  
  <p>Also when does dataproc applies these changes to hive.xml? after hive service start running on the cluster or before ?
  Also i am unable to find any documentation for how to restart hive and spark after making some changes to hive config after cluster creation ?</p>