081</a>) as well as a Prometheus instance (<a href="http://localhost:9090/">http://localhost:9090</a>).</p>
<center>
<img src="/img/blog/2019-03-11-prometheus-monitoring/prometheusexamplejob.png" width="600px" alt="PrometheusExampleJob in Flink Web UI"/>
<br/>
<i><small>Job graph and custom metric for example job in Flink web interface.</small></i>
</center>
<br/>
<p>The <code>PrometheusExampleJob</code> has three operators: Random numbers up to 10,000 are generated, then a map counts the events and creates