<div>
  This monitors the clock difference between the controller and nodes. While
  Jenkins itself is generally capable of tolerating clock differences between
  systems, version control activities and distributed file access (such as NFS,
  Windows file shares) tend to have strange problems when systems involved have
  different clocks.
  <br />
  It never marks an agent offline.

  <p>To keep clocks in sync, refer to NTP.</p>
</div>
