Add Spring Boot 4.0.0-RC2 support to Azure SDK Spring modules

[Copilot]

Description

Upgrades Azure SDK Spring modules to support Spring Boot 4.0.0-RC2 (releasing November 2025). Version management system updated, dependency versions synchronized, and deprecated API usage removed. Core modules (~85%) compile successfully; remaining compilation errors in autoconfigure module documented with solutions.

Changes Made

Version Management

• Updated Spring Boot 3.5.5 → 4.0.0-RC2 across 68 POM files
• Updated Spring Framework 6.2.10 → 7.0.0-RC3
• Updated Spring Cloud 2025.0.0 → 2025.0.0-RC1
• Updated Spring Integration 6.5.1 → 7.0.0-RC2, Spring Kafka 3.3.9 → 4.0.0-RC1
• Generated spring_boot_4.0.0-RC2_managed_external_dependencies.txt (2273 lines)
• Synchronized eng/versioning/external_dependencies.txt with 80+ dependency updates
• Extended version management scripts to support Spring Boot 4.x

Code Changes

• Removed 41 deprecated @NonNull annotations from org.springframework.lang package (deprecated in Spring Framework 7.0)
• Files affected: spring-messaging-azure, spring-cloud-azure-core, azure-spring-data-cosmos, spring-integration-azure, spring-cloud-azure-autoconfigure

Documentation

• Created sdk/spring/SPRING_BOOT_4_UPGRADE.md with:
  • Build status by module
  • Known API breaking changes with solutions
  • Remaining work breakdown (1-2 days estimated)
  • Testing strategy
  • Migration guide outline

Known Issues (Documented)

Spring Boot 4.0 introduces breaking changes requiring additional fixes:

1. PropertyMapper API - alwaysApplyingWhenNonNull() removed; use default behavior
2. ConfigurableBootstrapContext - Package changed to org.springframework.boot.bootstrap
3. Auto-configuration classes - ~7 files cannot find relocated classes (KafkaProperties, RedisProperties, DataSourceProperties)
4. Security integration - Spring Security 7.0 API changes need review
5. Constructor recursion - Logic error in AadOAuth2UserService

Details and solutions in sdk/spring/SPRING_BOOT_4_UPGRADE.md.

Build Status

✅ Successful: Core, Service, ResourceManager, Messaging, Data Cosmos, Feature Management, Integration
❌ Failed: AutoConfigure module (~50 compilation errors from auto-configuration API changes)

All SDK Contribution checklist:

• The pull request does not introduce [breaking changes] - Breaking changes documented for Spring Boot 3→4 migration
• CHANGELOG is updated for new features, bug fixes or other significant changes.
• I have read the contribution guidelines.

General Guidelines and Best Practices

• Title of the pull request is clear and informative.
• There are a small number of commits, each of which have an informative message.

Testing Guidelines

• Pull request includes test coverage for the included changes. - Tests pending compilation fixes

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Next Steps: Spring Integration team (@rujche, @saragluna) to complete auto-configuration API fixes. Foundation complete; remaining work focused and documented.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• https://api.github.com/repos/spring-projects/spring-boot/git/trees/v4.0.0-RC2
  • Triggering command: curl -s REDACTED (http block)
• oss.jfrog.org
  • Triggering command: /usr/lib/jvm/temurin-17-jdk-amd64/bin/java --enable-native-access=ALL-UNNAMED -classpath /usr/share/apache-maven-3.9.11/boot/plexus-classworlds-2.9.0.jar -Dclassworlds.conf=/usr/share/apache-maven-3.9.11/bin/m2.conf -Dmaven.home=/usr/share/apache-maven-3.9.11 -Dlibrary.jansi.path=/usr/share/apache-maven-3.9.11/lib/jansi-native -Dmaven.multiModuleProjectDirectory=/home/REDACTED/work/azure-sdk-for-java/azure-sdk-for-java/sdk/spring org.codehaus.plexus.classworlds.launcher.Launcher clean compile -f sdk/spring/pom.xml -Pdev -DskipTests -Dcheckstyle.skip -Dspotbugs.skip -Denforcer.skip -Drevapi.skip -T 2 (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

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This section details on the original issue you should resolve

<issue_title>Spring Boot 4.x support</issue_title>
<issue_description>As Spring Boot 4.x is almost ready for Release (2025-11), when does Azure-SDK able to support Spring Boot 4.x ?

Appreciate if you can share timeline, so that we can plan our enterprise upgrade accordingly. </issue_description>

<agent_instructions>Spring Boot 4.0.0-RC2 is the latest RC version, first you need to upgrade the versions in sdk/spring libraries, to see whether the APIs compatible, and whether the UTs pass. </agent_instructions>

Comments on the Issue (you are @copilot in this section)

@samvaity @anumalasri Thanks for bringing it to our attention. @Netyyyy and @rujche should be able to resolve this request soon. @saragluna @anumalasri we will test it, and then provide the timeline.

• Fixes Spring Boot 4.x support #47186

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