superPool logs UnknownHostException with HTTPS url but not HTTP urls

[arpit-saxena]

Here is a reproducer snippet:

import akka.stream.scaladsl.{Sink, Source}    
import akka.NotUsed
import scala.util.Success
import akka.http.scaladsl.model.HttpRequest
import akka.http.scaladsl.Http
import akka.actor.ActorSystem

implicit val system = ActorSystem()
Source.single((HttpRequest(uri = "https://a.com"), NotUsed))
          .via(Http().superPool[NotUsed]())
          .map(_ match {
              case (Success(v), _) => {v.discardEntityBytes(); println("Success")}
              case _ => println("Failure")
          })
          .runWith(Sink.ignore)

In this case, "Failure" is printed on the console but so are exceptions:

00:43:32.670 [default-akka.actor.default-dispatcher-5] ERROR akka.actor.ActorSystemImpl - Outgoing request stream error
akka.stream.StreamTcpException: Tcp command [Connect(a.com:443,None,List(),Some(10 seconds),true)] failed because of java.net.UnknownHostException: a.com
Caused by: java.net.UnknownHostException: a.com

If the URL is replaced with http://a.com, no exceptions are printed, only "Failure" is printed.

Is this expected behavior? I would expect it to either log exceptions in both cases or not log them in either

[jrudolph]

Hi @arpit-saxena, I tried to reproduce the issue but cannot find an issue between HTTP and HTTPS.

In neither case an exception is logged for me automatically. We might have fixed something in that regard, so can you check again with 10.1.12 or 10.2.0-M1?

[arpit-saxena]

Hi @jrudolph, you are right. I don't see the error being logged with 10.1.12. For reference, I was using 10.1.11 when I opened the issue.