server is not believed to be healthy, emit an alert via an alerts topic, and also send a message to our containing rack with all the open incidents that this server currently has.</li>
</ol>
<div class="alert alert-warning" markdown="1">
We'll omit the other handlers for brevity, but it's important to mention that <b>onTimer</b> makes sure that metric reports are coming in periodically, otherwise it'd trigger an alert stating that we didn’t hear from that server for a long time.
</div>
<h3 id="rackfun">
 