I occasionally receive the following messages when starting my app. When I do, the app fails to initialise.
Unhandled: DeadLetter(
Register(Actor[akka://myapp/user/StreamSupervisor-0/$$7#141722842],true,false),
Actor[akka://myapp/user/StreamSupervisor-0/$$7#141722842],
Actor[akka://myapp/system/IO-TCP/selectors/$a/59#87610191]
)
From this old spray thread, I would guess that Akka system was not accepting TCP listener registration messages from Akka HTTP.
The error doesn't always happen when the application starts, making me think it's a timing issue.
I'm using
"com.typesafe.akka" %% "akka-http" % "10.0.9",
"com.typesafe.akka" %% "akka-cluster" % "2.5.11",
"com.typesafe.akka" %% "akka-cluster-tools" % "2.5.11",
"com.lightbend.akka" %% "akka-stream-alpakka-amqp" % "0.17",
What's actually going on, and how can I prevent it?
