Observed Signal · Jun 28, 2026 · End of Life (EOL) Announcement · Source: DEV Community · Impact: 3/5 · Sentiment: Negative
Spring Boot 3.5 Reaches EOL June 30, 2026
A Dev.to post from the Solon Framework account warns that Spring Boot 3.5.x and the underlying Spring Framework 6.2 reach end-of-community support on June 30, 2026. The author highlights a non-trivial migration to Spring Boot 4 / Spring Framework 7, listing 115+ breaking changes (Jackson 3 migration, Undertow removal, testing annotation renames, module/package restructuring) that can require weeks-to-months of engineering work. Organizations can (A) migrate to Boot 4, (B) purchase expensive commercial support from VMware Tanzu, or (C) evaluate lighter-weight alternatives (Helidon, Quarkus, Micronaut, Jakarta EE, or other frameworks like Solon). The post also notes JDK timelines (JDK 21 NFTC license expiry September 2026 and JDK 25 LTS in September 2025) and gives practical mitigation steps: clear deprecations, stay patched on latest 3.5.x, expand tests, and inventory framework usage.
EOL for a widely used enterprise framework creates security, compliance, and migration costs for many production Java applications; teams must plan upgrades or pay for commercial support, which affects operational stability and engineering roadmaps.
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Key Takeaways & Evidence Grounding
- Spring Boot 3.5.x reaches end of community (OSS) support on June 30, 2026.
- Spring Framework 6.2 reaches end-of-life simultaneously because Spring Boot 3.5 is built on 6.2.
- Migration to Spring Boot 4 includes 115+ breaking changes, including a Jackson 3 migration, Undertow removal, and @MockBean/@SpyBean renames.
- VMware Tanzu offers commercial extended support for legacy branches as a paid stopgap.
- The article flags JDK timelines: JDK 21 NFTC license expires September 2026 and JDK 25 is expected as the next LTS (September 2025).
Ontology Mapping & Concepts
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