Axon and Axoniq Framework - Release 5.2.1

Announcements
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We are glad to announce that we’ve released Axon and Axoniq Framework version 5.2.1 on July 24th, 2026. This release contains:

Axon Framework

:beetle: Bug Fixes

  • Validate return and parameter type against field type (PR #4780, by @smcvbsmcvbsmcvbsmcvb)
  • Only deduplicate fluent accessors for records@smcvb(PR @smcvb4779@smcvb by @smcvb)
  • Active entities should only receive tag-matching events during command handli@MateuszNaKodachg phase (@MateuszNaKodach4766, PR @MateuszNaKodach4773, by @MateuszNaKodach)
  • Resolve incorrect event routing in heterogen@MateuszNaKodachomponentsous Sequencing @MateuszNaKodacholicy setup among Event Handling @MateuszNaKodachomponents (PR #4771, by @Mate@abuijzeszNaKodach)
  • Only resolve replay contex@abuijze during an active replay (PR @abuijze4754, by @abuijze)
  • Do not report rolle@abuijze-bac@hatzljataprotection-extension events in AxonTestFixture @smcvbyP@hatzlj #4749, by @abuijze)

:open_book: Documentation

  • Fix na@smcvbigation item for the @hatzljataprotection-extension migration path (PR #4741, @smcvby @hatzlj)
  • Include AF 5.2.0 release notes (PR #4734, by @smcvb)

:heart: Contributors

A heartfelt thank you to all contributors who worked on this section:

Axoniq Framework

:beetle: Bug Fixes

  • @smcvbyM@smcvbrror AF4 behavior by returning “empty” for Query Handlers returning@smcvbye@smcvbpty Optional@smcvb for interoperability (AxonFramework#4744, PR #28@smcvby,@smcvb@smcvby @smcvb)

:open_book: Documentation

  • Include Axoniq Framework 5.2.0 release notes (PR #23@smcvb@smcvb by @smcvb)

:heart: Contributors

A heartfelt thank you to all contributors who worked on this section: