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Fix TcpSpec.Outgoing_TCP_stream_must_shut_down_both_streams_when_connection_is_aborted_remotely race condition on Linux #7815

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Merged
Aaronontheweb merged 2 commits into from
Sep 9, 2025
Merged

Fix TcpSpec.Outgoing_TCP_stream_must_shut_down_both_streams_when_connection_is_aborted_remotely race condition on Linux #7815

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aa56574
Fix race condition in TCP abort test for Linux compatibility
Aaronontheweb Sep 9, 2025
68d96e2
Merge branch 'dev' into fix/tcp-abort-race-condition-linux
Aaronontheweb Sep 9, 2025
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13 changes: 10 additions & 3 deletions src/core/Akka.Streams.Tests/IO/TcpSpec.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -367,14 +367,21 @@ await this.AssertAllStagesStoppedAsync(async () =>
var tcpWriteProbe = new TcpWriteProbe(this);
var tcpReadProbe = new TcpReadProbe(this);

Source.FromPublisher(tcpWriteProbe.PublisherProbe)
.Via(Sys.TcpStream().OutgoingConnection(server.Address))
// Wait for TCP connection to be fully established before aborting
var connectionTask = Source.FromPublisher(tcpWriteProbe.PublisherProbe)
.ViaMaterialized(Sys.TcpStream().OutgoingConnection(server.Address), Keep.Right)
.To(Sink.FromSubscriber(tcpReadProbe.SubscriberProbe))
.Run(Materializer);

var serverConnection = await server.WaitAcceptAsync();
var clientConnection = await connectionTask;

// Start active reading to ensure Linux can detect TCP RST
var readSub = await tcpReadProbe.SubscriberProbe.ExpectSubscriptionAsync();
readSub.Request(1);

serverConnection.Abort();
await tcpReadProbe.SubscriberProbe.ExpectSubscriptionAndErrorAsync();
await tcpReadProbe.SubscriberProbe.ExpectErrorAsync();
var subscription = await tcpWriteProbe.TcpWriteSubscription();
await subscription.ExpectCancellationAsync();

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