Some metrics received are silently ignored (do not appear in output)

[Nyyr1]

By capturing input by ncat I found this metric:

kafkapre_31.akka_actor_time-in-mailbox.class.akka_actor_TypedCreatorFunctionConsumer.dispatcher.akka_actor_default-dispatcher.path.my-app_user_some-actor-b.system.my-app:0.008832|ms:0.012863999999999999|ms:0.016319999999999998|ms:0.01664|ms:0.016767999999999998|ms:0.017024|ms:0.017152|ms:0.01728|ms:0.017408|ms:0.017536|ms:0.017664|ms|@0.3333333333333333:0.017792|ms:0.018175999999999998|ms:0.018432|ms:0.01856|ms:0.018944|ms|@0.3333333333333333:0.019072|ms:0.0192|ms:0.019327999999999998|ms:0.019455999999999998|ms:0.019584|ms:0.019712|ms|@0.5:0.019968|ms|@0.5:0.020479999999999998|ms:0.020607999999999998|ms:0.020735999999999997|ms|@0.5:0.020864|ms:0.02112|ms:0.021376|ms:0.021632|ms:0.022015999999999997|ms|@0.5:0.0224|ms:0.022528|ms:0.023295999999999997|ms:0.023424|ms:0.023936|ms:0.024704|ms:0.025727999999999997|ms:0.025984|ms:0.026751999999999998|ms:0.026879999999999998|ms:0.027136|ms|@0.5:0.027264|ms:0.028159999999999998|ms:0.029311999999999998|mskafkapre_31.akka_actor_time-in-mailbox.class.akka_actor_TypedCreatorFunctionConsumer.dispatcher.akka_actor_default-dispatcher.path.my-app_user_some-actor-b.system.my-app:0.029439999999999997|ms:0.029696|ms:0.032256|ms:0.035072|ms:0.03712|ms

By capturing output via stream_cmd I found this key is missing in the output.

The metric is comming from kamon.
By using the original StatsD in Node.js I can see this metric sent from StatsD.

I am using statsite 0.8.0.

[augi]

IMHO this has been fixed by this commit that adds support for sample-rating for timer metrics.

I've just found this issue because we have a problem with missing gauges metrics with sample-rates.