How to deal with "connection pool shut down unexpectedly" ?

[Guofeng Zhang]

Hi,

I want to capture this exception in my application, but It cannot be capturued using CompletionStage<HttpResponse>.exceptionally().

How could I do capture it?

The follwing is the code:

        final HttpRequest request = HttpRequest.create(uri).addHeader(range) ;

        final CompletionStage<HttpResponse> responseFuture =

                Http.get(system)

                        .singleRequest(request, materializer);

        responseFuture.exceptionally(ex -> {

            failed(chunk, ex);

            return null ;

        }) ;

The following is the exception:

[error] a.a.ActorSystemImpl - Outgoing request stream error

akka.http.scaladsl.model.EntityStreamException: Entity stream truncation

at akka.http.impl.engine.parsing.HttpMessageParser$$anonfun$defaultEntity$1$$anonfun$1.applyOrElse(HttpMessageParser.scala:344)

at akka.http.impl.engine.parsing.HttpMessageParser$$anonfun$defaultEntity$1$$anonfun$1.applyOrElse(HttpMessageParser.scala:342)

at akka.stream.impl.fusing.Collect$$anon$2$$anonfun$4.apply(Ops.scala:175)

at akka.stream.impl.fusing.SupervisedGraphStageLogic.withSupervision(Ops.scala:142)

at akka.stream.impl.fusing.Collect$$anon$2.onPush(Ops.scala:177)

at akka.stream.impl.fusing.GraphInterpreter.processElement$1(GraphInterpreter.scala:590)

at akka.stream.impl.fusing.GraphInterpreter.processEvent(GraphInterpreter.scala:601)

at akka.stream.impl.fusing.GraphInterpreter.execute(GraphInterpreter.scala:542)

at akka.stream.impl.fusing.GraphInterpreterShell.runBatch(ActorGraphInterpreter.scala:471)

at akka.stream.impl.fusing.GraphInterpreterShell.receive(ActorGraphInterpreter.scala:423)

[info] a.a.LocalActorRef - Message [akka.http.impl.engine.client.PoolInterfaceActor$PoolRequest] from Actor[akka://application/user/pool-master#-922799551] to Actor[akka://application/user/pool-master/PoolInterfaceActor-0#1525660917] was not delivered. [1] dead letters encountered. This logging can be turned off or adjusted with configuration settings 'akka.log-dead-letters' and 'akka.log-dead-letters-during-shutdown'.

[info] a.a.LocalActorRef - Message [akka.http.impl.engine.client.PoolInterfaceActor$PoolRequest] from Actor[akka://application/user/pool-master#-922799551] to Actor[akka://application/user/pool-master/PoolInterfaceActor-0#1525660917] was not delivered. [2] dead letters encountered. This logging can be turned off or adjusted with configuration settings 'akka.log-dead-letters' and 'akka.log-dead-letters-during-shutdown'.

[error] a.h.i.e.c.PoolMasterActor - connection pool for PoolGateway(hcps = HostConnectionPoolSetup(runner.dressbad.com,80,ConnectionPoolSetup(ConnectionPoolSettings(4,0,5,32,1,30 seconds,ClientConnectionSettings(Some(User-Agent: akka-http/2.4.8),10 seconds,1 minute,512,<function0>,List(),ParserSettings(2048,16,64,64,8192,64,8388608,256,1048576,Strict,RFC6265,true,Full,Map(If-Range -> 0, If-Modified-Since -> 0, If-Unmodified-Since -> 0, default -> 12, Content-MD5 -> 0, Date -> 0, If-Match -> 0, If-None-Match -> 0, User-Agent -> 32),false,<function1>,<function1>,<function2>))),akka.http.scaladsl.HttpConnectionContext$@7994f4f8,akka.event.BusLogging@421bed04))) has shut down unexpectedly

When the exception occurred, my application hung up because my application cannot capture the exception so that it cannot recover from it.

Thanks for your help very much.

I use Akka 2.4.8, Java 8.

Guofeng