Play's application.conf ignored by Kamon when I load the kamon-akka module

[gaelrenoux]

I have a Play application (with Scala). In one controller, I inject the actor system and start a few actors to accomplish background tasks.

I have just set up Kamon (0.6.0) with Statsd, Graphite and Graphana as the back-end. With these modules, everything works fine:

• kamon-core
• kamon-system-metrics
• kamon-scala
• kamon-play-24
• kamon-statsd

I use the aspectj-play-runner plugin and start my application with aspectj-runner:run. The Kamon.start() is in the Global.onStart(Application) method.

However, as soon as I add kamon-akka in my build.sbt, Kamon seems not to be able to read the configurations values in conf/application.conf any more. I have put a debug point in SimpleMetricKeyGenerator (when it reads "kamon.statsd.simple-metric-key-generator"):

• without kamon-akka, the values in configSettings are those coming from my configuration ;
• with kamon-akka, the values in configSettings are the defaut values.

Play still has access to the values in conf/application.conf, though.

[dpsoft]

@gaelrenoux the kamon-play-24 module have a guice module for autostarting, if you are starting kamon in your Globa.onStart you need disable the guice module with play.modules.disable += kamon.play.di.KamonModule.
In relation to the configuration issue, sounds like a bug in the aspectj-runner plugin and I need some time to investigate.

you can try with aspectj-runner:run -Dconfig.resource=application.conf

[gaelrenoux]

Thanks for the advice, I removed the Kamon.start and Kamon.stop.

I got some time to look a bit more into it, I uploaded a sample application here. It works fine as is. But uncomment kamon-akka in build.sbt, and you have a problem on startup where it doesn't find application.conf.

I tried the following but it didn't help :
aspectj-runner:run -Dconfig.resource=application.conf
aspectj-runner:run -Dconfig.resource=conf/application.conf
aspectj-runner:run -Dconfig.resource=/full/path/to/conf/application.conf

[ozgunatacan]

This is probably related:
kamon-io/sbt-aspectj-runner#5

[dpsoft]

@gaelrenoux sorry for the late response ;(, but If you run the example with aspectj-runner:run -Dconfig.file=conf/application.conf and everything is ok.
I think that the issue is related to kamon and play DEV mode but I need more time to research.