Akka 1.5.70

Akka.NET

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Akka.NET is a .NET port of the popular Akka project from the Scala / Java community. We are an idiomatic .NET implementation of the actor model built on top of the .NET Common Language Runtime.

Akka.NET is a .NET Foundation project.

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How is Akka.NET Used?

Akka.NET can be used in-process or inside large, distributed real-time systems; we support a wide variety of use cases.

Akka.NET can be used to solve the following types of problems:

  1. Concurrency - Akka.NET actors only process messages one-at-a-time and they do so in first in, first out (FIFO) order; this means that any application state internal to an actor is automatically thread-safe without having to use locks or any other shared-memory synchronization mechanisms.
  2. Stream Processing - Akka.NET actors and Akka.Streams make it easy to build streaming applications, used for processing incoming streams of data or incoming streams of live events such as UI or network events inside native applications.
  3. Event-Driven Programming - actors make it easy to build event-driven applications, as actors' message-processing routines naturally express these types of designs.
  4. Event Sourcing and CQRS - Akka.Persistence, used by actors to make their state re-entrant and recoverable across restarts or migrations between nodes, natively supports event sourcing. Akka.Persistence.Query can be used to compute CQRS-style projections and materialized views from Akka.Persistence data.
  5. Location Transparency - Akka.Remote makes it simple for actors in remote processes to transparently communicate with each other.
  6. Highly Available, Fault-Tolerant Distributed Systems - Akka.Cluster, Akka.Cluster.Sharding, and other tools built on top of Akka.Cluster make it possible to build highly available and fault-tolerant distributed systems by leveraging peer-to-peer programming models with topology-aware message routing and distribution.
  7. Low Latency, High Throughput - Akka.NET aims to be low latency and high throughput, processing 10s millions of messages per second in-memory and hundreds of thousands of messages per second over remote connections.

Where Can I Learn Akka.NET?

You can start by taking the Akka.NET Bootcamp, but there are many other great learning resources for Akka.NET Online.

Build Status

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Install Akka.NET via NuGet

If you want to include Akka.NET in your project, you can install it directly from NuGet

To install Akka.NET Distributed Actor Framework, run the following command in the Package Manager Console

PM> Install-Package Akka.Hosting

Akka.Hosting includes the base Akka NuGet package and also provides an easy interface to integrate Akka.NET with the most-used parts of the Microsoft.Extensions ecosystem: Configuration, Logging, Hosting, and DependencyInjection. We encourage developers to adopt it.

And if you need F# support:

PM> Install-Package Akka.FSharp

Akka.NET Project Templates

To create your own Akka.NET projects using our templates (Akka.Templates), install them via the dotnet CLI:

dotnet new install "Akka.Templates::*"

This will make our templates available via dotnet new on the CLI and as new project templates inside any .NET IDE such as Visual Studio or JetBrains Rider. You can view the full list of templates included in our package here: https://github.com/akkadotnet/akkadotnet-templates#available-templates

Builds

Please see Building Akka.NET.

To access nightly Akka.NET builds, please see the instructions here.

Support

If you need help getting started with Akka.NET, there's a number of great community resources online:

If you and your company are interested in getting professional Akka.NET support, you can contact Petabridge for dedicated Akka.NET support.

No packages depend on Akka.

Akka.NET v1.5.70 is a maintenance release that adds a new "last-N" query offset to Akka.Persistence.Query, resolves two Akka.Streams reliability issues and improves BroadcastHub performance under high consumer counts, and fixes a consistent-hashing router bug that could wedge an entire cluster after a 32-bit hash collision.

Akka.Persistence.Query

  • Add Offset.FromEnd(int count) รขโ‚ฌโ€ "last-N events" query offset: Introduces Offset.FromEnd(int count), a new query-input-only offset type that begins a read journal query at the Nth event from the end of history rather than from the beginning. The offset is resolved at stream materialization into a concrete Sequence start position; no interface changes or wire-format changes are required. Includes opt-in TCK spec (FromEndOffsetSpec) for plugin authors.

Akka.Streams Bug Fixes

  • Fix: async enumerable source disposal ordering: Fixes a race in Source.From(IAsyncEnumerable<T>) where the underlying enumerator could be disposed before all elements were delivered to downstream, causing ObjectDisposedException on high-throughput pipelines.
  • Fix: ChannelSink drops final element on backpressure - Fixes #8285: ChannelSink was discarding the last element in a sequence whenever the downstream Channel<T> applied backpressure during completion. The sink now correctly delivers all elements before signaling completion.

Akka.Streams Performance

Akka.Core Bug Fixes

  • Fix: consistent-hashing router could wedge cluster-wide after a 32-bit hash collision - Fixes #8031: When two virtual nodes collided in the 32-bit consistent-hash ring (increasingly likely at high routee counts, e.g. when the ring was rebuilt after a node was downed), ConsistentHash.Create threw "An entry with the same key already exists". The consistent-hashing router swallowed the exception and returned NoRoutee for every subsequent message until a manual restart. The ring now linear-probes to the next free slot on a collision instead of throwing. This keeps the hash distribution unchanged and produces a byte-identical ring to prior versions whenever no collision occurs (safe for rolling upgrades), and also protects Akka.Cluster.Tools' ClusterReceptionist, which builds the same ring.

2 contributors since release 1.5.69

COMMITS LOC+ LOC- AUTHOR
22 2274 332 Aaron Stannard
1 97 4 beminee

To see the full set of changes in Akka.NET v1.5.70, click here.

Version Downloads Last updated
1.5.70 2 07/04/2026
1.5.70-beta2 4 07/02/2026
1.5.70-beta1 17 06/25/2026
1.5.69 20 06/14/2026
1.5.68 22 05/19/2026
1.5.67 32 04/26/2026
1.5.66 31 04/26/2026
1.5.65 28 04/12/2026
1.5.64 29 04/02/2026
1.5.63 30 03/26/2026
1.5.62 22 03/05/2026
1.5.61 31 03/02/2026
1.5.60 33 02/10/2026
1.5.59 36 01/28/2026
1.5.58 34 01/11/2026
1.5.57 44 12/12/2025
1.5.57-beta2 38 12/11/2025
1.5.57-beta1 34 12/11/2025
1.5.56 31 12/11/2025
1.5.55 32 12/13/2025
1.5.54 32 12/11/2025
1.5.53 32 12/14/2025
1.5.52 31 12/13/2025
1.5.51 33 12/13/2025
1.5.50 33 12/10/2025
1.5.49 29 12/12/2025
1.5.48 34 12/11/2025
1.5.47 32 12/12/2025
1.5.46 41 12/10/2025
1.5.45 46 12/09/2025
1.5.44 34 12/10/2025
1.5.43 30 12/11/2025
1.5.42 36 12/11/2025
1.5.41 34 12/11/2025
1.5.40 33 12/11/2025
1.5.39 29 12/11/2025
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1.5.36 31 12/13/2025
1.5.35 33 12/10/2025
1.5.34 33 12/12/2025
1.5.33 20 12/12/2025
1.5.32 35 12/09/2025
1.5.31 41 12/11/2025
1.5.30 29 12/10/2025
1.5.29 36 12/11/2025
1.5.28 40 12/10/2025
1.5.28-beta1 30 12/09/2025
1.5.27.1 33 12/09/2025
1.5.27 30 12/11/2025
1.5.27-beta2 28 12/11/2025
1.5.27-beta1 30 12/11/2025
1.5.26 34 12/11/2025
1.5.25 31 12/10/2025
1.5.24 32 12/09/2025
1.5.23 32 12/10/2025
1.5.22 23 12/12/2025
1.5.21 33 12/10/2025
1.5.20 29 12/10/2025
1.5.19 31 12/11/2025
1.5.18 36 12/10/2025
1.5.17.1 33 12/12/2025
1.5.17 30 12/12/2025
1.5.16 35 12/09/2025
1.5.15 37 12/09/2025
1.5.14 33 12/12/2025
1.5.13 31 12/10/2025
1.5.13-beta1 26 12/10/2025
1.5.12 31 12/11/2025
1.5.11 33 12/11/2025
1.5.10 35 12/10/2025
1.5.9 35 12/11/2025
1.5.8 43 12/12/2025
1.5.7 34 12/11/2025
1.5.6 28 12/10/2025
1.5.5 21 12/13/2025
1.5.4 31 12/10/2025
1.5.3 30 12/10/2025
1.5.2 25 12/11/2025
1.5.1 32 12/09/2025
1.5.0 36 12/10/2025
1.5.0-beta6 40 12/14/2025
1.5.0-beta5 31 12/13/2025
1.5.0-beta4 33 12/09/2025
1.5.0-beta3 27 12/10/2025
1.5.0-beta2 30 12/14/2025
1.5.0-beta1 33 12/10/2025
1.5.0-alpha4 36 12/10/2025
1.5.0-alpha3 29 12/11/2025
1.5.0-alpha2 33 12/12/2025
1.5.0-alpha1 33 12/10/2025
1.4.51 23 12/13/2025
1.4.50 35 12/10/2025
1.4.49 32 12/12/2025
1.4.49-beta1 29 12/11/2025
1.4.48 36 12/11/2025
1.4.47 24 12/10/2025
1.4.46 28 12/12/2025
1.4.45 29 12/09/2025
1.4.44 33 12/11/2025
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1.4.42 30 12/09/2025
1.4.41 29 12/13/2025
1.4.40 30 12/10/2025
1.4.39 28 12/10/2025
1.4.38 35 12/10/2025
1.4.37 33 12/10/2025
1.4.36 29 12/15/2025
1.4.35 28 12/10/2025
1.4.34 29 12/13/2025
1.4.33 32 12/10/2025
1.4.32 31 12/12/2025
1.4.31 30 12/11/2025
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1.4.28 29 12/10/2025
1.4.27 31 12/10/2025
1.4.26 30 12/13/2025
1.4.25 32 12/12/2025
1.4.24 28 12/10/2025
1.4.23 33 12/11/2025
1.4.22 32 12/11/2025
1.4.21 39 12/10/2025
1.4.21-beta1 29 12/12/2025
1.4.20 31 12/15/2025
1.4.19 35 12/15/2025
1.4.18 27 12/10/2025
1.4.17 29 12/10/2025
1.4.16 35 12/12/2025
1.4.15 35 12/11/2025
1.4.14 35 12/10/2025
1.4.13 28 12/10/2025
1.4.12 30 12/09/2025
1.4.11 32 12/15/2025
1.4.10 36 12/15/2025
1.4.9 30 12/10/2025
1.4.8 28 12/12/2025
1.4.7 49 12/11/2025
1.4.6 34 12/10/2025
1.4.5 35 12/10/2025
1.4.4 30 12/12/2025
1.4.3 28 12/10/2025
1.4.2 26 12/12/2025
1.4.1 37 12/10/2025
1.4.1-rc3 29 12/09/2025
1.4.1-rc2 37 12/10/2025
1.4.1-rc1 30 12/14/2025
1.4.0 32 12/14/2025
1.4.0-beta4 27 12/16/2025
1.4.0-beta3 27 12/13/2025
1.4.0-beta2 24 12/10/2025
1.4.0-beta1 28 12/09/2025
1.3.19 36 12/11/2025
1.3.18 32 12/12/2025
1.3.17 27 12/10/2025
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1.3.15 33 12/11/2025
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1.3.10 24 12/15/2025
1.3.9 33 12/11/2025
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1.3.5 39 12/09/2025
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1.3.3 23 12/15/2025
1.3.2 34 12/10/2025
1.3.1 29 12/12/2025
1.3.0 39 12/15/2025
1.2.3 28 12/09/2025
1.2.2 32 12/09/2025
1.2.1 35 12/11/2025
1.2.0 33 12/12/2025
1.1.3 34 12/15/2025
1.1.2 32 12/15/2025
1.1.1 29 12/14/2025
1.1.0 39 12/11/2025
1.0.8 29 12/10/2025
1.0.7 33 12/11/2025
1.0.6 36 12/11/2025
1.0.5 31 12/10/2025
1.0.4 40 12/12/2025
1.0.3 36 12/10/2025
1.0.2 38 12/11/2025
1.0.1 45 12/10/2025
1.0.0 29 12/10/2025
1.0.0-dev1504032244 28 12/10/2025
0.8.0 25 12/15/2025
0.7.1 31 12/11/2025
0.7.0 32 12/14/2025
0.6.4 30 12/11/2025
0.6.3 37 12/09/2025
0.6.2 27 12/11/2025
0.6.1 31 12/10/2025
0.6.0 35 12/11/2025
0.5.8 31 12/12/2025
0.5.2 34 12/12/2025
0.5.0 36 12/11/2025
0.2.1-beta 30 12/11/2025
0.2.0-beta 29 12/10/2025