Release Notes (2.0.x)

Apache Pekko 2.0.x releases support Java 17 and above.

2.0.0-M1

This is milestone release and is aimed at testing this new major version by early adopters. This is experimental. This release should not be used in production.

Main changes

• Java 17 is the new minimum
• Scala 2.12 support dropped
• A lot of deprecated code removed
• A lot of pekko.util classes for Scala version compatibility have been removed
• Big change for all Java DSL users due to the removal of pekko.japi.Function (and related classes) to use pekko.japi.function.Function instead (lambdas should recompile ok but if you declared variables or functions explicitly, then you may need to change your imports)
• New pekko-serialization-jackson3. Users who are happy with the pekko-serialization-jackson, which uses Jackson 2, can stick with that
• Changed the pekko-serialization-jackson lz4-java dependency to at.yawk.lz4:lz4-java, a fork that has important bugfixes

Upgrade notes

• Agrona was updated from 1.x to 2.x, which means you may have to add --add-opens java.base/jdk.internal.misc=ALL-UNNAMED if you use the Java Module System and Pekko Remote