Unmarshaller not working for HttpEntity for text/html response for "Error in stage [unknown-operation]: Promise already completed"

[Sarah Yin]

Hi Akka User,

I've been trying to Unmarshall HttpResponse and decode it as a String. However All the method I've searched failed in "Error in stage [unknown-operation]: Promise already completed"

Has anyone come to this before? Thanks in ad!

Here are the Future I want to decode 

val responseFuture: Future[HttpResponse] = Http().singleRequest(HttpRequest(uri = uri))

 

Here are some of the methods I've tried:

responseFuture onComplete {
case Success(response) =>
val timeout = 300.millis
response.status match {
case StatusCodes.OK =>
println("printing content")
// println(response.entity.dataBytes.runForeach(println))
// println(response.entity.dataBytes.map(_.utf8String))
// response.entity.dataBytes
// .map(line => println(line))
// println(response.entity.toStrict(5 seconds).map(_.data.decodeString("UTF-8")))
// println(Unmarshal(response.entity).to[String])
// val entity = Unmarshal(response.entity).to[String]
// entity onComplete { entity =>
// println(entity)
// }
// Unmarshaller.entityToString(response.entity)
// println(PredefinedFromEntityUnmarshallers.stringUnmarshaller(response.entity))
// println(response.entity.toStrict(5 seconds).map(_.data.decodeString("UTF-8")) )
val bs: Future[ByteString] = response.entity.toStrict(timeout).map { _.data }
// val s: Future[String] = bs.map(_.utf8String)
println(bs)
case _ =>
println("failed to get dynamic url")
}
case Failure(error) =>
println(error.toString)
}

 

[Konrad Malawski]

What Akka version are you on?

We have a similar issue reported but in a slightly different place... https://github.com/akka/akka/issues/19981

What is the server responding with specifically?

I'd be very suprised if on a normal usual response we fail toStricting() this is used by all tools, including some at Lightbend so that would have come up already hm..

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Cheers,

Konrad 'ktoso' Malawski

Akka @ Lightbend