On Sunday, June 7, 2015 at 6:38:51 PM UTC+3, drewhk wrote:
>
>
>
> On Sun, Jun 7, 2015 at 5:32 PM, Andrey Kuznetsov <[email protected]
> <javascript:>> wrote:
>
>> auth and session makes context.stop(self) inside Cancel handler of
>> their receive's.
>>
>
> umm, but they will not get a Cancel from merge if merge itself is not
> cancelled, which it will not be in this case. So mtproto gets the
> completion from the TCP flow, feeds it into merge, but merge will continue
> happily.
>
umm, I see, now I understand
I rewrote the flow, and now I observing only TIME_WAIT and no CLOSE_WAIT
sockets which is pretty ok. The fixed flow:
val completeSink = Sink.onComplete {
case x ⇒
authManager ! PoisonPill
sessionClient ! PoisonPill
system.log.debug("Completing {}", x)
}
Flow() { implicit builder ⇒
import FlowGraph.Implicits._
val bcast = builder.add(Broadcast[ByteString](2))
val merge = builder.add(Merge[MTProto](3))
val mtproto = builder.add(mtprotoFlow)
val auth = builder.add(authSource)
val session = builder.add(sessionClientSource)
val mapResp = builder.add(mapRespFlow)
val complete = builder.add(completeSink)
// format: OFF
bcast ~> complete
bcast ~> mtproto ~> merge
auth ~> merge
session ~> merge ~> mapResp
// format: ON
(bcast.in, mapResp.outlet)
}
Enter code here...
Thank you, both @Akka team and @drehk!
>
>
>> And they see it if client closes connection (at least if it is being
>> closed by Connection reset by peer).
>>
>
> Yes, because then the TCP flow *cancels* not half-closes, i.e. you will
> get a cancel event coming from the downstream to the upstreams, which in
> turn causes merge itself and all upstreams to cancel (there is also an
> onError coming from the upstream direction at the same time). A normal
> remote client on the other hand comes as a completion event form the
>
> Anyway, it is easy to check this. Put a printline in somewhere the auth or
> session actor where it gets a Cancel, then try a half-closed client
> connection and see what gets printed.
>
> -Endre
>
>
>> I tried to send PoisonPill to auth and session actors from
>> Sink.onComplete and still observed CLOSE_WAIT connections.
>> --
>>
>> Andrey Kuznetsov
>>
>>
>> On Sun, Jun 7, 2015, at 08:07 AM, Endre Varga wrote:
>>
>> Hi Andrey,
>>
>> When do the auth and session sources finish? Do you see the onComplete
>> log message from broadcast? Since the connections you see are in
>> CLOSE_WAIT, that means that your server already received a close from the
>> client, but it has not yet closed its own side (half-closed). I suspect
>> that since you have more than one input wired into your merge node, if the
>> inbound mtproto flow closes, the merge itself continues if the other two
>> inputs of it are not completing and therefore keeping the connection open.
>>
>> -Endre
>> _
>>
>> On Sun, Jun 7, 2015 at 4:44 PM, Andrey Kuznetsov <[email protected]
>> <javascript:>> wrote:
>>
>> and mapResponse is a PushStage:
>>
>>
>> *def*mapResponse(system:ActorSystem)=*new*PushStage[MTProto,ByteString]{
>> *private*[*this*]*var*packageIndex:Int=-1
>>
>> *overridedef*onPush(elem:MTProto,ctx:Context[ByteString])={
>> packageIndex +=1
>> *val *pkg =TransportPackage(packageIndex,elem)
>>
>> *val *resBits =TransportPackageCodec.encode(pkg).require
>> *val *res =ByteString(resBits.toByteBuffer)
>>
>> elem *match *{
>> *case*_:Drop⇒
>> ctx.pushAndFinish(res)
>> *case*_ ⇒
>> ctx.push(res)
>> }
>> }
>>
>>
>>
>>
>>
>> On Sunday, June 7, 2015 at 7:03:01 AM UTC+3, Andrey Kuznetsov wrote:
>>
>> I am using akka-streams for handling incoming TCP connections. After
>> putting application behind AWS Elastic Load Balancer, it started to fall
>> into "too many open files" problem because of lots of connections in
>> CLOSE_WAIT state. Is there an ability to close such connection on a server
>> side?
>>
>>
>> --
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>
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