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Posted to issues@camel.apache.org by "Claus Ibsen (Jira)" <ji...@apache.org> on 2026/10/06 19:45:00 UTC

[jira] [Resolved] (CAMEL-25338) camel-spring-boot - document Jackson 2 / Jackson 3 usage and migration

     [ https://issues.apache.org/jira/browse/CAMEL-25338?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Claus Ibsen resolved CAMEL-25338.
---------------------------------
    Fix Version/s: 4.23.0
       Resolution: Fixed

Done in https://github.com/apache/camel-spring-boot/pull/2018 (merged 2026-10-06). Resolving, as the ticket was not updated when the change was merged.

_Claude Code on behalf of Claus Ibsen_

> camel-spring-boot - document Jackson 2 / Jackson 3 usage and migration
> ----------------------------------------------------------------------
>
>                 Key: CAMEL-25338
>                 URL: https://issues.apache.org/jira/browse/CAMEL-25338
>             Project: Camel
>          Issue Type: Improvement
>          Components: camel-spring-boot, documentation
>            Reporter: Federico Mariani
>            Assignee: Federico Mariani
>            Priority: Major
>             Fix For: 4.23.0
>
>
> Since 4.19 Camel Spring Boot runs on Spring Boot 4 (Jackson 3 by default), and Camel ships two parallel Jackson module families (camel-jackson* / camel-jackson3*) that register the same data format names, transformers, configurer and starter beans. There is no Jackson guidance in docs/spring-boot today.
> Add a page covering:
> * only one Camel Jackson line per application (both starters -> BeanDefinitionOverrideException; starters bringing camel-jackson transitively -> classpath order silently decides the data format, and camel.dataformat.jackson.* is dropped when Jackson 2 wins)
> * Kamelet schema resolution only works with the Jackson 2 modules
> * upgrading from 4.18 while staying on Jackson 2 (auto-discover-object-mapper no longer finds a Spring mapper; spring.jackson2.* prefix)
> * moving to Jackson 3: Camel-specific configuration changes (feature prefixes, modules, auto-discovery caveats, onException), payload changes, keeping the Jackson 2 format for Camel only
> * Jackson versions come from the Spring Boot BOM
> All statements were reproduced against Camel Spring Boot 4.22.1 / Spring Boot 4.1.1. Related to CAMEL-22857.
> _Claude Code on behalf of Croway_



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