akkadotnet/akka.net 1.5.69

Akka.NET v1.5.69

on GitHub

1.5.69 June 12th, 2026

Akka.NET v1.5.69 is a maintenance release with bug fixes for Akka.DistributedData state propagation, Akka.Core message rejection handling, and Akka.Streams tracing reliability and backpressure cancellation.

Akka.Streams

• Fix: propagate trace context across the .Async() actor boundary - Fixes #8243: With stream tracing enabled, per-element trace context was dropped at the publisher/subscriber actor boundary introduced by .Async(), leaving downstream stages with no ambient ActivityContext. Trace context now flows correctly across fused interpreter shells.
• Add OfferAsync(T, CancellationToken) to ISourceQueue<T> — enables cancellation of backpressured pending offers without emitting the cancelled element.

Akka.Streams Bug Fixes

• Fix: observe discarded stream task faults - Fixes #8241: Resolves a NullReferenceException in the GraphInterpreter when tracing across actor boundaries — the interpreter now safely handles null activity context references during stream teardown.

Akka.Core

• Fix: RejectOnType<TMessage> should use Rejection, not Failure - Fixes #8231: RejectOnType now correctly wraps rejected messages as Rejection rather than throwing a Failure, matching the expected stream contract.

Akka.DistributedData

• Fix: propagate full state after pruning - Fixes #8220: Resolves a bug where pruning could cause incomplete state propagation in ORSet and LWWDictionary, leading to data inconsistencies during node merges.

1 contributor since release 1.5.68

Akka.NET v1.5.68 is a maintenance release with bug fixes for Akka.IO TCP connection handling, Akka.Streams stream materialized task faults, and Akka.TestKit xUnit 3 parallel context management.

Akka.IO Bug Fixes

• Fix: report Tcp.CommandFailed when a scheduled connect retry throws - Fixes #8195: On Linux, a dropped TCP connection could permanently stall the user actor — it never received Tcp.Connected or Tcp.CommandFailed because a PlatformNotSupportedException thrown during a scheduled connect retry was swallowed by the HashedWheelTimerScheduler. The retry is now scheduled as a RetryConnect self-message via IWithTimers, ensuring any exception is surfaced to the commander as Tcp.CommandFailed and the connection actor stops cleanly. The pending timer is also canceled automatically when the actor stops, removing a latent use-after-dispose bug.

Akka.Streams Bug Fixes

• Fix: observe discarded stream task faults - Fixes #8209 and #8210: IgnoreSink, QueueSource, and LazySink now observe their internal materialized Task faults, preventing them from surfacing later as UnobservedTaskException events on the thread pool.

Akka.TestKit Bug Fixes

• Fix: wrap outer SynchronizationContext in ActorCellKeepingSynchronizationContext - ActorCellKeepingSynchronizationContext now accepts an optional inner SynchronizationContext and delegates scheduling to it while wrapping callbacks with the cell-pinning window. This prevents test hangs in downstream consumers such as Akka.Hosting.TestKit whose async IHost lifecycle depends on xUnit v3's MaxConcurrencySyncContext scheduling.

1 contributor since release 1.5.67

To see the full set of changes in Akka.NET v1.5.68, click here.

Changes:

• 5183965 Release Akka.NET v1.5.69 (#8262)
• 7e0e818 Akka.Streams: add cancellation-aware Source.Queue offers (#8248) — backport to v1.5 (#8258)
• 10a30fe Propagate trace context across the .Async() actor boundary (#8243) (#8246) [ #8241 ]
• 8fcde23 Harden flaky v1.5 unit tests (#8249)
• bc62882 Fix NullReferenceException in GraphInterpreter when tracing across actor boundaries (#8241) (#8242) [ #8243 ]
• 7d04bb4 fix: RejectOnType should use Rejection, not Failure (#8231)
• 29a8a36 fix(ddata): propagate full state after pruning (#8220) [ #8219 ]

This list of changes was auto generated.