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July 09


Akka 2.3.12 Released!

Dear hAkkers,

We—the Akka committers—are pleased to be able to announce the availability of Akka 2.3.12. This is the twelfth maintenance release of the 2.3 branch. This release contains a few important fixes:

  • a fix for a race between Terminated message and final write in TCP (#17932)
  • a fix for CircuitBreaker where concurrent transitions did not occur (#17415)
  • improvement in flow control of system message delivery (#17554)

This release also adds a configurable TestActor creation timeout in TestKit, suppresses Tcp.CloseCommand from logging and improves documentation (#17669, #15569).

Akka 2.3.12 is released for Scala 2.10.4 and 2.11.5. This release is backwards binary compatible with all previous 2.3.x versions which means that the new JARs are a drop-in replacement for the old one (but not the other way around) as long as your build does not enable the inliner (Scala-only restriction). Always make sure to use at least the latest version required by any of your project’s dependencies.

Migrating from Older Relases

When migrating an existing project from Akka 2.2.x please have a look at the migration guide.

Additional Release Details

The artifacts comprising this release have been published to and also to Maven Central. In addition, we adopted the sbt standard of encoding the Scala binary version in the artifact name, i.e. the core actor package’s artifactId is “akka-actor_2.10” or “akka-actor_2.11”, respectively.

The complete list of closed tickets can be found in the 2.3.12 github issues milestone.


commits added removed
      9   138      36 Patrik Nordwall
      3    83       7 Konrad Malawski
      3   110     200 Martynas Mickevičius
      2    83       5 Roland Kuhn
      2    17       2 Endre Sándor Varga
      1     1       1 hepin
      1    12      23 kukido

Happy hAkking!