Reactor Core 3.8.0-RC1 is part of the 2025.0.0-RC1 Release Train.

What's Changed

⚠️ Update considerations and deprecations

• Introduce JSpecify for nullability annotations by @chemicL in #4091

✨ New features and improvements

• Depend on Micrometer v1.16.0-RC1 by @violetagg in 0e4e24c
• Depend on Micrometer Tracing v1.6.0-RC1 by @violetagg in 0e4e24c
• Depend on Context Propagation v1.2.0-RC1 by @violetagg in 0e4e24c
• Depend on Blockhound v1.0.14.RELEASE by @dependabot[bot] in #4088
• Add Hooks#isAutomaticContextPropagationEnabled by @sdeleuze in #4090
• Adjust reactor.util.Logger vararg nullability by @chemicL in #4098
• Adjust Mono methods: fromCallable and fromSupplier nullability by @chemicL in #4116

🐞 Bug fixes

• Adjust Flux#map mapper to disallow null return values by @chemicL in #4103

Full Changelog: v3.8.0-M7...v3.8.0-RC1