Akka 25.05 Released
Dear hakkers,
We are excited to announce the availability of the Akka libraries 25.05 release, setting a new baseline of Akka library versions that go together.
Akka 25.05 consists of the following module versions:
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Akka core 2.10.5
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Akka HTTP 10.7.1
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Akka gRPC 2.5.5
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Akka Management 1.6.2
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Alpakka Kafka 7.0.2
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Alpakka 9.0.2
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Akka Persistence R2DBC 1.3.7
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Akka Persistence DynamoDB 2.0.6
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Akka Persistence JDBC 5.5.2
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Akka Persistence Cassandra 1.3.2
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Akka Projections 1.6.13
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Akka Diagnostics 2.2.1
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Akka Insights 2.21.2
These versions also consistently upgrade to Jackson 2.18.3.
As reference of versions that go together for Akka 25.05, please see Akka module versions 25.05.
Virtual thread dispatchers on Java 21
Akka now supports configuring a dispatcher to run on virtual threads when executing on JVM 21 or later. This is useful for isolated dispatchers for blocking operations as it allows a much higher number of concurrent blocking tasks than a thread-pool-based dispatcher.
For more details see the blocking operations section of the docs and reference.conf
Note that the virtual thread dispatcher is not generally suitable as an actor dispatcher because of its overhead.
Store arbitrary metadata with events for Event Sourced entities
It is now possible to store additional metadata together with the events persisted by an Event Sourced entity
implemented with the EventSourcedBehavior and replicated Event Sourcing APIs for journals that support metadata using
the new persistWithMetadata() effects.
The metadata can then be accessed by queries and projections through the event envelope metadata[T] for Scala and getMetadata(Class<T>) for Java.
License key
Akka requires a license key for use in production.
Read about the motivation in the blog post Akka License Keys && a No SPAM Promise.
Obtain a free key at https://akka.io/key.
Security Updates
We run automated security vulnerability and license policy scanning of dependencies. No vulnerabilities or upstream vulnerabilities have been found since Akka 24.10.
Bug fixes
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Multiple fixes in the async DNS client akka #32636
Other improvements
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API for calculating exponential backoff
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New retry settings API
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Restart flow logging tuning options
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Java API for invoke with feedback in stream graph stages
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Default request headers for gRPC clients
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gRPC client retries using the new retry settings API
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Multiple improvements for R2DBC projection queries
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Multiple improvements for DynamoDB projections
Compatibility
All modules of Akka 25.05 are backwards compatible with Akka 24.10. No configuration changes are needed. Rolling update of Akka Cluster is fully supported.