Spring Boot 4.1.0 Released: Production‑Ready Features You Should Know

Spring Boot 4.1.0 builds on the 4.x foundation by adding production‑focused enhancements such as native gRPC auto‑configuration, outbound SSRF protection, lazy JDBC connections, OpenTelemetry support, and updated Jackson 3 settings, while offering guidance on when and how to upgrade.

Jackson 3Lazy JDBCOpenTelemetry

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Spring Boot 4.1.0 Released: Production‑Ready Features You Should Know

Java Backend Technology

Feb 6, 2026 · Backend Development

What Breaking Changes Does Jackson 3 Introduce When Upgrading Spring Boot 4?

Upgrading to Spring Boot 4 brings Jackson 3, which reorganizes packages, replaces ObjectMapper with JsonMapper, changes the default date format to ISO‑8601, and converts checked exceptions to RuntimeException, requiring developers to adapt code, adjust configurations, and understand the design rationale to avoid runtime bugs.

API changesJackson 3Java

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What Breaking Changes Does Jackson 3 Introduce When Upgrading Spring Boot 4?

Su San Talks Tech

Jan 5, 2026 · Backend Development

Spring Boot 4 Switches Default JSON Library from Jackson 2 to Jackson 3 – What Changes to Expect

Spring Boot 4 upgrades its default JSON processor to Jackson 3, introducing new package names, immutable builders, ISO‑8601 date serialization, and removal of checked exceptions, while preserving annotation compatibility for a smooth migration.

JSONJackson 3Spring Boot

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Spring Boot 4 Switches Default JSON Library from Jackson 2 to Jackson 3 – What Changes to Expect

Spring Boot 4.1.0 Released: Production‑Ready Features You Should Know

What Breaking Changes Does Jackson 3 Introduce When Upgrading Spring Boot 4?

Spring Boot 4 Switches Default JSON Library from Jackson 2 to Jackson 3 – What Changes to Expect

What Breaking Changes Does Jackson 3 Introduce When Upgrading Spring Boot 4?