title: Can I restart Jenkins master node without stopping slave nodes' jobs?
body: <p>I have very important and long jobs working in slave nodes and master node have no jobs.
  In this situation, I need to reconfigure and update plugins.</p>
  
  <p>(Actually there are many longs jobs(take longer than one hour, but these jobs must restarted in 5 minutes.)</p>
  
  <p>Can I restart Jenkins master node without stopping slave nodes' jobs?</p>