Hi Timothy,
Hello hAkkers, It's me again. Is it possible to know when outgoing
> connection will be closed and then complete closeConn promise or throw
> failure in flow context? Without closeConn promise I can't work with idle
> stream.
> This is an example for issue:
>
> ```
> val serverAddress = new InetSocketAddress("coreos", 2375)
> val closeConn = Promise[ByteString]()
> val source = Source(closeConn.future).drop(1) // as an example. In the
> real application, source is a WS endless stream of commands from user.
> Tcp()
> .outgoingConnection(serverAddress)
> .runWith(source, Sink.foreach(println))
> ```
>
> When outgoing connection has been closed then I saw a debug message "Read
> returned end-of-stream, our side not yet closed". How to avoid this kind of
> leak?
>
This means, that the remote side has closed its connection ("read returned
end-of-stream") but the local side still keeps the channel open ("our side
not yet closed"). TCP has the concept of half-close and Akka IO reflects
that.
> I did try to add StatefulStage to tcp stream and watch on onUpstreamFinish:
>
> ```
> class CloseStage extends StatefulStage[ByteString, ByteString] {
> def initial: State = new State {
> def onPush(elem: ByteString, ctx: Context[ByteString]):
> SyncDirective =
> ctx.push(elem)
>
> def onUpstreamFinish(ctx: Context[ByteString]):
> TerminationDirective = {
> println("onUpstreamFinish")
> ???
> }
> }
> }
> Tcp()
> .outgoingConnection(serverAddress)
> .transform(() => new CloseStage())
> .runWith(source, Sink.foreach(println))
> ```
>
> But nothing happened.
>
In your above example nothing is connected to the input side of the TCP
connection, so I don't know if a completion is expected or not. If you have
not received an onUpstreamFinish, then the TCP connection has not yet been
closed.
> Am I right?
>
Unfortunately I don't know, since the above examples are not enough to
understand your issue. Can you create a small test case that I can run
locally and reproduces your problem?
-Endre
>
> Thank you.
>
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--
Akka Team
Typesafe - Reactive apps on the JVM
Blog: letitcrash.com
Twitter: @akkateam
--
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>>>>>>>>>> Check the FAQ:
>>>>>>>>>> http://doc.akka.io/docs/akka/current/additional/faq.html
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