title: Setting the job priority in YARN
body: <p>My cluster (HDP) is using YARN capacity scheduler. 
  The nameNode UI shows Version 2.7.1.2.4.3.30.<br>
  I am trying to set the job priority to HIGH in my hive script:</p>
  
  <pre><code>set mapreduce.job.priority=HIGH; 
  </code></pre>
  
  <p>However I see not difference in the allocation of resources.
  I cannot see the property <code>yarn.scheduler.fair.preemption</code> in the yarn-site.xml.
  Moreover what is the equivalent property for Tez?</p>