title: Unhealthy event: SourceId='System.RAP'
body: <p>I have an application (Azure Service Fabric) that works successfully locally and on environment with 3 nodes but on environment with 5 nodes two services contain warning (for one of the 5 replicas):</p>
  
  <pre><code>Unhealthy event: SourceId='System.RAP', Property='IStatelessServiceInstance.OpenDuration', HealthState='Warning', ConsiderWarningAsError=false.
  </code></pre>
  
  <p>As a result sometimes we get <code>503 Service Unavailable Error</code>.</p>