Summary

Welcome to the June 2026 Akka.NET Community Standup! Since our last meetup on May 13, we've shipped 2 core releases (v1.5.68 → v1.5.69), coordinated ecosystem updates to v1.5.68, and a major security patch for Akka.Hosting.

🔭 Headline: v1.6 is the Performance Year. We are in the middle of a full benchmark-driven performance overhaul spanning Akka.Remote transport, Akka.Streams internals, and serialization. From Source.ActorRef GraphStage migration to experimental Pipe Transport substrates, we're systematically measuring, rejecting, and optimizing every hot path.

Recent Akka.NET Releases

Akka.NET Core — 2 releases

v1.5.68 — May 17, 2026

• Tcp.CommandFailed fix on Linux (#8214) — dropped TCP connections no longer stall user actors indefinitely
• Discarded stream task faults properly observed (#8212)
• Outer SynchronizationContext properly wrapped in ActorCell (#8182)

v1.5.69 — June 12, 2026

• Trace context across .Async() boundary (#8246) — fixes a gap in the OpenTelemetry propagation chain across fused interpreter shells
• Cancellable ISourceQueue<T> offers added (#8248)
• NullReferenceException in GraphInterpreter when tracing across actor boundaries (#8242)
• RejectOnType<TMessage> uses Rejection correctly (#8231)
• DistributedData state propagation fix after pruning (#8220)

Akka.Hosting — 1 release

v1.5.68 — May 18, 2026

• 🔒 Security: OpenTelemetry bumped to 1.10.0 (#743) — resolves moderate severity vulnerability in 1.9.0
• Implicit-sender leak under xUnit v3 parallel execution fixed (#735)