Akka.NET v1.3.8 Stable Release

1.3.8 June 04 2018

Maintenance Release for Akka.NET 1.3

Akka.NET v1.3.7 is a minor patch consisting mostly of bug fixes as well as an upgrade to DotNetty v0.4.8.

DotNetty v0.4.8 Upgrade
You can read the release notes for DotNetty v0.4.8 here - but here are the major improvements as they pertain to Akka.NET:

1. DotNetty length-frame decoding is now fully-supported on .NET Core on Linux and
2. Socket shutdown code has been improved, which fixes a potential "port exhaustion" issue reported by Akka.Remote users.

If you've been affected by either of these issues, we strongly encourage that you upgrade your applications to Akka.NET v1.3.8 as soon as possible.

Updates and Additions

1. Akka.Streams: add PreMaterialize support for Sources
2. Akka.Streams: add PreMaterialize support for Sinks
3. Akka.Streams:
   Port Pulse, DelayFlow and Valve streams-contrib stages
4. Akka.FSharp: Unit test Akka.FSharp.System.create with extensions

Relevant documentation for Akka.Streams pre-materialization, for those who are interested: http://getakka.net/articles/streams/basics.html#source-pre-materialization

Bugfixes

1. Akka.Remote: ActorSelection fails for ActorPath from remotely deployed actors
2. Akka.Remote: WilcardCard ActorSelections that fail to match any actors don't deliver messages into DeadLetters
3. Akka.Cluster: SplitBrainResolver logs "network partition detected" after change in cluster membership, even when no unreachable nodes
4. Akka: SynchronizationLockException in user-defined mailboxes
5. Akka: UnhandledMessageForwarder crashes and restarted every time the app is starting

COMMITS	LOC+	LOC-	AUTHOR
17	498	171	Aaron Stannard
4	1054	23	Bartosz Sypytkowski
2	2	2	Fábio Beirão
2	16	2	Aaron Palmer
1	1063	4	Oleksandr Bogomaz
1	1	1	Ismael Hamed
1	1	1	Gauthier Segay

Akka.NET v1.3.7 Stable Release

1.3.7 May 15 2018

Maintenance Release for Akka.NET 1.3

Akka.NET v1.3.7 is a minor patch consisting mostly of bug fixes.

DotNetty stabilization
We've had a number of issues related to DotNetty issues over recent weeks, and we've resolved those in this patch by doing the following:

• Locking down the version of DotNetty to v0.4.6 until further notice
• Resolving memory leaks introduced with DotNetty in v1.3.6

We will be upgrading to DotNetty v0.4.8 in a near future release, but in the meantime this patch fixes critical issues introduced in v1.3.6.

Bugfixes

1. Akka.Persistence.Sql: Slow reading of big snapshots - this will require a recompilation of all Akka.Persistence.Sql-type Akka.Persistence plugins.
2. Akka.Fsharp: spawning an actor results in Exception in 1.3.6 release

See the full list of fixes for Akka.NET v1.3.7 here.

COMMITS	LOC+	LOC-	AUTHOR
5	130	180	Aaron Stannard
3	7	1	chrisjhoare
2	3	1	ivog
1	70	17	TietoOliverKurowski
1	41	4	Bart de Boer
1	11	3	Oleksandr Bogomaz
1	1	1	Vasily Kirichenko

Akka.NET v1.3.6 Stable Release

1.3.6 April 17 2018

Maintenance Release for Akka.NET 1.3

Akka.NET v1.3.6 is a minor patch consisting mostly of bug fixes.

Akka.FSharp on .NET Standard
The biggest change in this release is the availability of Akka.FSharp on .NET Standard and .NET Core!

Akka.FSharp runs on .NET Standard 2.0 as of 1.3.6 (it doesn't support .NET Standard 1.6 like the rest of Akka.NET due to FSharp-specific, downstream dependencies.)

Updates and Additions

1. Akka.Streams: Port 4 "streams contrib" stages - AccumulateWhileUnchanged, LastElement, PartitionWith, Sample
2. Akka.Remote: Add public-port setting to allow for port aliasing inside environments like Docker, PCF

Bugfixes

1. Akka.Cluster.Sharding: Removing string.GetHashCode usage from distributed classes
2. Akka.Cluster.Sharding: HashCodeMessageExtractor can create inconsistent ShardId's
3. Akka.Remote:
   Error while decoding incoming Akka PDU Exception when communicating between Remote Actors with a large number of messages on Linux
4. Akka.Cluster.Sharding: DData: Cannot create a shard proxy on a cluster node that is not in the same role as the proxied shard entity
5. Akka.Streams: Fix GroupedWithin allocation of new buffer after emit.
6. Akka.Persistence: Add missing ReturnRecoveryPermit

You can see the full set of changes for Akka.NET v1.3.6 here.

COMMITS	LOC+	LOC-	AUTHOR
7	261	38	Aaron Stannard
6	28	28	cimryan
5	53	20	Tomasz Jaskula
2	7	4	Ondrej Pialek
2	20	10	Ismael Hamed
1	739	0	Oleksandr Bogomaz
1	64	6	Robert
1	23	29	nathvi
1	2	1	Sebastien Bacquet
1	1	2	Ond�ej Piálek
1	1	1	Steffen Skov
1	1	1	Sean Gilliam
1	1	1	Matthew Herman
1	1	1	Jan Pluskal

Akka.NET v1.3.5 Stable Release

1.3.5 February 21 2018

Maintenance Release for Akka.NET 1.3

Akka.NET v1.3.5 is a minor patch containing only bugfixes.

Updates and Bugfixes

1. Akka.Cluster.Tools: DistributedPubSub Fix premature pruning of topics

You can see the full set of changes for Akka.NET v1.3.4 here.

COMMITS	LOC+	LOC-	AUTHOR
4	4405	4284	Aaron Stannard
1	4	4	Joshua Garnett

Akka.NET v1.3.4 Stable Release

1.3.4 February 1 2018

Maintenance Release for Akka.NET 1.3

Akka.NET v1.3.4 is a minor patch mostly focused on bugfixes.

Updates and Bugfixes

1. Akka: Ask interface should be clean
2. Akka.Cluster.Sharding: DData replicator is always assigned
3. Akka.Cluster: Akka.Cluster Group Routers don't respect role setting when running with allow-local-routees
4. Akka.Streams: Implement PartitionHub
5. Akka.Remote AkkaPduCodec performance fixes
6. Akka.Serialization.Hyperion updated to Hyperion v0.9.8

You can see the full set of changes for Akka.NET v1.3.4 here.

COMMITS	LOC+	LOC-	AUTHOR
6	304	209	Aaron Stannard
1	250	220	Maxim Cherednik
1	1278	42	Marc Piechura
1	1	1	zbynek001
1	1	1	Vasily Kirichenko

Akka.NET v1.3.3 Stable Release

1.3.3 January 19 2019

Maintenance Release for Akka.NET 1.3

The largest changes featured in Akka.NET v1.3.3 are the introduction of Splint brain resolvers and WeaklyUp members in Akka.Cluster.

Akka.Cluster Split Brain Resolvers
Split brain resolvers are specialized IDowningProvider implementations that give Akka.Cluster users the ability to automatically down Unreachable cluster nodes in accordance with well-defined partition resolution strategies, namely:

• Static quorums;
• Keep majority;
• Keep oldest; and
• Keep-referee.

You can learn more about why you may want to use these and which strategy is right for you by reading our Splint brain resolver documentation.

Akka.Cluster WeaklyUp Members
One common problem that occurs in Akka.Cluster is that once a current member of the cluster becomes Unreachable, the leader of the cluster isn't able to allow any new members of the cluster to join until that Unreachable member becomes Reachable again or is removed from the cluster via a Cluster.Down command.

Beginning in Akka.NET 1.3.3, you can allow nodes to still join and participate in the cluster even while other member nodes are unreachable by opting into the WeaklyUp status for members. You can do this by setting the following in your HOCON configuration beginning in Akka.NET v1.3.3:

akka.cluster.allow-weakly-up-members = on

This will allow nodes who have joined the cluster when at least one other member was unreachable to become functioning cluster members with a status of WeaklyUp. If the unreachable members of the cluster are downed or become reachable again, all WeaklyUp nodes will be upgraded to the usual Up status for available cluster members.

Akka.Cluster.Sharding and Akka.Cluster.DistributedData Integration
A new experimental feature we've added in Akka.NET v1.3.3 is the ability to fully decouple Akka.Cluster.Sharding from Akka.Persistence and instead run it on top of Akka.Cluster.DistributedData, our library for creating eventually consistent replicated data structures on top of Akka.Cluster.

Beginning in Akka.NET 1.3.3, you can set the following HOCON configuration option to have the ShardingCoordinator replicate its shard placement state using DData instead of persisting it to storage via Akka.Persistence:

akka.cluster.sharding.state-store-mode = ddata

This setting only affects how Akka.Cluster.Sharding's internal state is managed. If you're using Akka.Persistence with your own entity actors inside Akka.Cluster.Sharding, this change will have no impact on them.

Updates and bugfixes:

• Added Cluster.JoinAsync and Clutser.JoinSeedNodesAsync methods
• Updated Akka.Serialization.Hyperion to Hyperion v0.9.7 - see Hyperion v0.9.7 release notes here.
• Fixed: A Source.SplitAfter Akka example extra output
• Fixed: Udp.Received give incorrect ByteString when client send several packets at once
• Fixed: TcpOutgoingConnection does not dispose properly - memory leak
• Fixed: Akka.IO & WSAEWOULDBLOCK socket error
• Fixed: Sharding-RegionProxyTerminated fix
• Fixed: Excessive rebalance in LeastShardAllocationStrategy
• Fixed: Persistence - fix double return of recovery permit
• Change: Changed Akka.IO configured buffer-size to 512B
• Change: Added human-friendly error for failed MNTK discovery

You can see the full changeset for Akka.NET 1.3.3 here.

COMMITS	LOC+	LOC-	AUTHOR
17	2094	1389	Marc Piechura
13	5426	2827	Bartosz Sypytkowski
12	444	815	Aaron Stannard
11	346	217	ravengerUA
3	90	28	zbynek001
3	78	84	Maxim Cherednik
2	445	1	Vasily Kirichenko
2	22	11	Ismael Hamed
2	11	9	Nicola Sanitate
1	9	10	mrrd
1	7	2	Richard Dobson
1	33	7	Ivars Auzins
1	30	11	Will
1	3	3	HaniOB
1	11	199	Jon Galloway
1	1	1	Sam Neirinck
1	1	1	Irvin Dominin

Akka.NET v1.3.2 Stable Release

Streams

• Implemented Restart Flow/Source/Sink graph stages (#3090)
• Implemented MergePrioritized graph stage (#3110)
• Added Streams IO docs (#3109)
• Updated Streams Error-Handling article (#3086)
• Add MergeHub and BroadcastHub docs (#3108)
• Added timeout parameter to Probe.RequestNext and ManualProbe.ExpectNext (#3122)

Other

• Enabled Optimize=true in all netstandard1.6 assemblies (#3088)
• Fixed Sharding serialization bug (#3087)
• Added InternalApi and ApiMayChange annotations (#3101)
• Fixed Tcp throws ArgumentNullException, when receiving data on Mono (#3092)
• Fixed performance degradation if recovering with big numbers of snaps… (#3138)
• Removed dependency on Akka.Tests.Shared.Internals in Akka.Cluster.Testkit (#3131)
• When the underlying assertion api allows, don't drop user messages (#3142)

COMMITS	LOC+	LOC-	AUTHOR
9	137	59	Aaron Stannard
8	2713	997	Alex Valuyskiy
3	486	95	Bartosz Sypytkowski
3	12	12	Sebastien Bacquet
2	33	7	ravengerUA
2	184	102	Arjen Smits
1	71	7	Adam Friedman
1	7	4	Sam Neirinck
1	604	481	zbynek001
1	6	6	Kenneth Ito
1	42	3	Lukas Rieger
1	40	2	Joshua Benjamin
1	4	5	derrickcrowne
1	3	2	Mikhail Moussikhine
1	20	0	Arturo Sevilla
1	2	0	Paweł Bańka
1	17	11	planerist
1	1	4	lesscode

You can view the full v1.3.2 change set here.

Akka.NET v1.3.1 Stable Release

Maintenance Release for Akka.NET 1.3

Updates and bugfixes:

• Bugfix: Hyperion NuGet package restore creating duplicate assemblies for the same version inside Akka
• Various documentation fixes and updates
• Bugfix: issue where data sent via UDP when ByteString payload had buffers with length more than 1, UdpSender only wrote the first part of the buffers and dropped the rest.
• Bugfix: Akka.IO.Tcp failed to write some outgoing messages.
• Improved support for OSX & Rider
• Bugfix: Akka.Persistence support for SerializerWithStringManifest required by Akka.Cluster.Sharding and Akka.Cluster.Tools
  • Akka.Persistence.Sqlite and Akka.Persistence.SqlServer were unable to support SerializerWithStringManifest, so using Akka.Cluster.Sharding with Sql plugins would not work.
• Bugfix: Akka.Streams generic type parameters of the flow returned from current implementation of Bidiflow's JoinMat method were incorrect.
• Bugfix: PersistenceMessageSerializer was failing with the wrong exceptoin when a non-supported type was provided.

Akka.Persistence backwards compability warning:

• Akka.Persistence.Sql introduces an additional field to the schema used by Sql-based plugins to allow for the use of SerializerWithStringManifest called serializer_id. It requires any previous Sql schema to be updated to have this field. Details are included in the Akka.Persistence.Sqlite plugin README.md file. Users of the Akka.Persistence.Sqlite plugin must alter their existing databases to add the field serializer_id int (4):

ALTER TABLE {your_event_journal_table_name} ADD COLUMN `serializer_id` INTEGER ( 4 )
ALTER TABLE {your_snapshot_table_name} ADD COLUMN `serializer_id` INTEGER ( 4 )

See the full set of Akka.NET 1.3.1 fixes here.

Akka.NET v1.3.0 Stable Release

1.3.0 August 11 2017

Feature Release for Akka.NET
Akka.NET 1.3.0 is a major feature release that introduces the significant changes to Akka.NET and its runtime.

.NET Core and .NET Standard 1.6 Support
This release introduces support for .NET Standard 1.6 for our core libraries and .NET Core 1.1 for the MultiNode Test Runner standalone executable. All packages for Akka.NET are dual-released under both .NET 4.5 and .NET Standard 1.6.

As a side note: Akka.NET on .NET 4.5 is not wire compatible with Akka.NET on .NET Core; this is due to fundamental changes made to the base types in the CLR on .NET Core. It's a common problem facing many different serializers and networking libraries in .NET at the moment. You can use a X-plat serializer we've developed here: #2947 - please comment on that thread if you're considering building hybrid .NET and .NET Core clusters.

Akka.Persistence Released to Market
Akka.Persistence has graduated from beta status to stable modules and its interfaces are now considered to be stable. We'll begin updating all of the Akka.Persistence plugins to stable and to add .NET Standard / .NET 4.5 support to each of them as well following this patch.

DocFx-based Documentation Site
Documentation is now generated using DocFx and compiled from within the Akka.NET project rather than a separate documentation repository.

API Changes
This release does not maintain wire format compatibility with the previous release (v1.2.3) inside Akka.Remote; primarily this is due to having to upgrade from Google Protobuf2 to Protobuf3 in order to add .NET Standard support, but we've also taken the liberty of making other serialization improvements while we're at it. So be advised that during an upgrade from 1.2.* to 1.3.* there will be periods of network disruption between nodes using different versions of the service.

Akka.Remote Performance Improvements
Akka.Remote's throughput has been significantly increased.

See the full set of Akka.NET 1.3.0 fixes here.

COMMITS	LOC+	LOC-	AUTHOR
78	65031	95061	Alex Valuyskiy
64	7109	2670	Marc Piechura
61	2420	6703	Nick Chamberlain
46	2316	10066	Aaron Stannard
31	17284	13592	Bartosz Sypytkowski
25	2527	1124	Gregorius Soedharmo
21	7810	1688	zbynek001
11	1932	2167	Sean Gilliam
9	946	219	Arjen Smits
4	344	6	Lealand Vettleson
4	1644	2210	Arkatufus
3	32	6	Lukas Rieger
3	153	17	Quartus Dev
2	8	11	Paweł Bańka
2	4866	12678	olegz
2	1148	176	Ismael Hamed
1	62	5	Mikhail Kantarovskiy
1	4	2	tstojecki
1	22	2	Maxim Cherednik
1	1	1	Sean Killeen

v1.2.3 Stable Release

1.2.3 July 07 2017

Maintenance Release for Akka.NET 1.2

Resolves a bug introduced in Akka.NET 1.2.2 that caused Akka.Remote to not terminate properly under some conditions during ActorSystem.Terminate.

See the full set of Akka.NET 1.2.3 fixes here.

COMMITS	LOC+	LOC-	AUTHOR
3	46	63	Aaron Stannard