added v1.4.22 release notes

[Aaronontheweb]

1.4.22 August 05 2021

Maintenance Release for Akka.NET 1.4

Akka.NET v1.4.22 is a fairly large release that includes an assortment of performance and bug fixes.

Performance Fixes
Akka.NET v1.4.22 includes a significant performance improvement for Ask<T>, which now requires 1 internal await operation instead of 3:

Before

Method	Iterations	Mean	Error	StdDev	Gen 0	Gen 1	Gen 2	Allocated
RequestResponseActorSelection	10000	83.313 ms	0.7553 ms	0.7065 ms	4666.6667	-	-	19 MB
CreateActorSelection	10000	5.572 ms	0.1066 ms	0.1140 ms	953.1250	-	-	4 MB

After

Method	Iterations	Mean	Error	StdDev	Gen 0	Gen 1	Gen 2	Allocated
RequestResponseActorSelection	10000	71.216 ms	0.9885 ms	0.9246 ms	4285.7143	-	-	17 MB
CreateActorSelection	10000	5.462 ms	0.0495 ms	0.0439 ms	953.1250	-	-	4 MB

Bug Fixes and Improvements

• Akka: Use ranged nuget versioning for Newtonsoft.Json
• Akka: Pipe of Canceled Tasks
• Akka: CircuitBreaker's Open state should return a faulted Task instead of throwing
• Akka.Remote: Can DotNetty socket exception include information about the address?
• Akka.Remote: log full exception upon deserialization failure
• Akka.Cluster: SBR fix & update
• Akka.Streams: Restart Source|Flow|Sink: Configurable stream restart deadline
• Akka.DistributedData: ddata replicator stops but doesn't look like it can be restarted easily
• Akka.DistributedData: ddata ReadMajorityPlus and WriteMajorityPlus
• Akka.DistributedData: DData Max-Delta-Elements may not be fully honoured

You can see the full set of changes introduced in Akka.NET v1.4.22 here

Akka.Cluster.Sharding.RepairTool
In addition to the work done on Akka.NET itself, we've also created a separate tool for cleaning up any left-over data in the event of an Akka.Cluster.Sharding cluster running with akka.cluster.sharding.state-store-mode=persistence was terminated abruptly before it had a chance to cleanup.

We've added documentation to the Akka.NET website that explains how to use this tool here: https://getakka.net/articles/clustering/cluster-sharding.html#cleaning-up-akkapersistence-shard-state

And the tool itself has documentation here: https://github.com/petabridge/Akka.Cluster.Sharding.RepairTool

COMMITS	LOC+	LOC-	AUTHOR
16	1254	160	Gregorius Soedharmo
7	104	83	Aaron Stannard
5	8	8	dependabot[bot]
4	876	302	Ismael Hamed
2	3942	716	zbynek001
2	17	3	Andreas Dirnberger
1	187	2	andyfurnival
1	110	5	Igor Fedchenko