# Akka 2.5.20 Released

**URL:** <https://discuss.akka.io/t/akka-2-5-20-released/3329>\
**Category:** Akka Libraries\
**Tags:** announcement\
**Created:** [January 29, 2019, 12:20pm UTC](https://discuss.akka.io/t/akka-2-5-20-released/3329 "2019-01-29T12:20:31Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![johanandren](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.akka.io/johanandren/32/85_2.png) [@johanandren](https://discuss.akka.io/u/johanandren)\
**Post date:** [January 29, 2019, 12:20pm UTC](https://discuss.akka.io/t/akka-2-5-20-released/3329/1 "2019-01-29T12:20:31Z")

</div>

Dear hakkers,

We are pleased to announce a new patch release of Akka 2.5. Some notable improvements and bug fixes in 2.5.20 are:

- Discovery and DNS APIs are now stable
- New stream functionality: SourceWithContext and FlowWithContext allows for keeping a context object “on the side” while processing an element. [#25951](https://github.com/akka/akka/pull/25951)
- Improvements of default shard rebalancing algorithm, [#26012](https://github.com/akka/akka/issues/26012)
- The serializer manifest is now logged when a serializer is missing to help figuring out such errors [#26217](https://github.com/akka/akka/issues/26217)
- The cluster join compatibility check now supports rolling upgrades [#26194](https://github.com/akka/akka/issues/26194)
- An optimization to AtLeastOnceDelivery - only tick when there are unconfirmed deliveries [#26216](https://github.com/akka/akka/issues/26216)
- Terminate StreamRef on node failure [#25960](https://github.com/akka/akka/issues/25960)
- SelfUniqueAddress instead of Cluster parameter in some Distributed Data types (old signatures have been deprecated) [#25746](https://github.com/akka/akka/issues/25746)

A total of 72 issues were closed since 2.5.19. The complete list can be found on the [2.5.20 milestone](https://github.com/akka/akka/milestone/136?closed=1) on github.

## API changes in Akka Typed

- The Java command and event handler builders in Persistence Typed are now mutable and created through newCommandHandlerBuilder and newEventHandlerBuilder, additional improvements has also been done to the builder APIs [#26109](https://github.com/akka/akka/issues/26109)
- A typed actor can now pipe the completed value of a Future/CompletionStage to itself [#26199](https://github.com/akka/akka/issues/26199)
- Behavior for logging all incoming messages to an actor to replace the corresponding functionality for untyped actors [#26226](https://github.com/akka/akka/issues/26226)
- [More improvements](https://github.com/akka/akka/issues?q=is%3Aissue+milestone%3A2.5.20+is%3Aclosed+label%3At%3Atyped)

## Credits

For this release we had the help of 34 committers – thank you all very much!

```auto
commits added removed
     24 3942 1367 Patrik Nordwall
     15 11972 9290 kerr
     10 842 674 Arnout Engelen
      9 1532 917 Helena Edelson
      8 260 86 Dale Wijnand
      6 1513 205 Renato Cavalcanti
      5 217 23 Johan Andrén
      4 66 160 Christopher Batey
      4 137 10 Seeta Ramayya
      2 584 248 Johannes Rudolph
      2 435 306 James Roper
      2 86 52 Guillaume Massé
      2 23 1 Nicolas Vollmar
      2 6 6 Seth Tisue
      1 727 1 Raymond Roestenburg
      1 209 207 Tim Moore
      1 247 3 Sean Glover
      1 188 22 Adrien Mannocci
      1 149 3 Martin Grotzke
      1 53 58 Jeffrey Chung
      1 87 2 Michael Kholodov
      1 39 0 airt
      1 24 4 Karl Sjöstrand
      1 15 1 mszczygiel
      1 10 0 Karel Čemus
      1 8 0 Josep Prat
      1 2 2 Aleksei Molokovskikh
      1 2 2 Martynas Mickevičius
      1 2 2 RomanIakovlev
      1 1 1 Pierre-Marie Padiou
      1 1 1 Dávid István Bíró
      1 1 1 Oleksandr Sova
      1 1 1 balteo
      1 1 1 Marcos Pereira

```

Happy hakking!

– The Akka Team