[2.5] Constantly getting Dead Letter Warnings.

[kraythe]

In our play application things generally do what they are supposed to do but since we updated to 2.5 we are constantly getting these warnings in our log. Is there something wrong or some way we can suppress 

[RepointableActorRef] akka://play-akka/user/StreamSupervisor-0/flow-7-3-actorRefSource -  Message [akka.actor.Status$Success] from Actor[akka://play-akka/deadLetters] to Actor[akka://play-akka/user/StreamSupervisor-0/flow-7-3-actorRefSource#-1110297386] was not delivered. [7] dead letters encountered. This logging can be turned off or adjusted with configuration settings 'akka.log-dead-letters' and 'akka.log-dead-letters-during-shutdown'.

Thanks in advance

[Christian Schmitt]

You could try adding a

log-dead-letters-during-shutdown = off to your akka config.
I guess that happens when a WebSocket is closed while you still tried to delivered a message to it (but it was in a shutdown state)