title: Kamon is not reporting the data to prometheus
body: <p>I have web service which is built using <code>scala-play(version 2.5.12)</code> framework. Trying to capture metrics using <code>kamon</code> and <code>prometheus</code>.</p>
  
  <p>Below is the code snippet which i have done so far.</p>
  
  <p>Dependencies: </p>
  
  <pre><code>"io.kamon" %% "kamon-play-2.5" % "1.1.0",
  "io.kamon" %% "kamon-core" % "1.1.0",
  "org.aspectj" % "aspectjweaver" % "1.9.2",
  "io.kamon" %% "kamon-prometheus" % "1.1.1"
  </code></pre>
  
  <p>conf/application.conf </p>
  
  <pre><code>kamon {
    metric {
      tick-interval = 1 second
    }
  
    metric {
      filters {
        trace.includes = [ "**" ]
        akka-dispatcher.includes = [ "**" ]
      }
    }
  
    modules {
      kamon-log-reporter.auto-start = no
    }
  }
  </code></pre>
  
  <p>I have initialized the <code>kamon reporter</code> in one of my config file.</p>
  
  <pre><code>import kamon.Kamon
  import kamon.prometheus.PrometheusReporter  
  
  Kamon.addReporter( new PrometheusReporter() )
  </code></pre>
  
  <p>I am adding tracing in one of my controller </p>
  
  <pre><code>import kamon.play.action.OperationName
  
  override def test(userName: Option[String]): Action[JsValue] = OperationName("test-access")  {
      Action.async(parse.json) {
        ......
      }
    }
  </code></pre>
  
  <p>I am building the jar and running in local with below command</p>
  
  <pre><code>/bin/example-app -J-javaagent:./lib/org.aspectj.aspectjweaver-1.9.2.jar -Dorg.aspectj.tracing.factory=default
  </code></pre>
  
  <p>Application is running and i can see in the logs that reporter has started. 
  Below is the log </p>
  
  <p><code>2018-12-07 12:06:20,556 level=[INFO] logger=[kamon.prometheus.PrometheusReporter] thread=[kamon.prometheus.PrometheusReporter] rid=[] user=[] message=[Started the embedded HTTP server on http://0.0.0.0:9095]</code></p>
  
  <p>But I don't see anything in <code>http://localhost:9095/metrics</code>. It is empty.</p>
  
  <p>There is no error and unable to debug this. Is there anything i am missing here? </p>