Bump json-schema-validator to 2.0.4 / 3.0.6, jackson to 2.21.1 / 3.1.4#1058
Merged
Kehrlann merged 1 commit intoJul 8, 2026
Merged
Conversation
The validator resolved its bundled meta-schemas through the thread context class loader only, which cannot see them under OSGi, so DefaultJsonSchemaValidator failed at construction (modelcontextprotocol#992). Fixed upstream in networknt/json-schema-validator#1265 / #1266 and released in 3.0.6 / 2.0.4. json-schema-validator 3.0.6 is built against Jackson 3.1.4 and requires jackson-annotations 2.21, so those floors move with it; the Jackson 2 line is aligned to 2.21.1. Verified with an embedded-Felix reproducer: with a thread context class loader that cannot see the bundled meta-schema, both validator modules now construct cleanly. Fixes modelcontextprotocol#992
Kehrlann
added
bug
Kehrlann
changed the title
Kehrlann
approved these changes
Jul 8, 2026
Kehrlann
left a comment
Kehrlann
left a comment
Contributor
There was a problem hiding this comment.
Thanks for your upstream contribution 👏
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Bumps
json-schema-validatorto 2.0.4 (Jackson 2) / 3.0.6 (Jackson 3) to adopt the OSGi class-loading fix, and moves the Jackson floors those releases require.Fixes #992
Motivation and Context
DefaultJsonSchemaValidatoreagerly loads the bundled Draft 2020-12 meta-schema, andjson-schema-validatorresolved it through the thread context class loader only — under OSGi that loader cannot see the validator's own jar, so every server failed at startup withFileNotFoundException: classpath:draft/2020-12/schema. Fixed upstream in networknt/json-schema-validator#1265 / networknt/json-schema-validator#1266, released as 3.0.6 / 2.0.4.json-schema-validator 3.0.6 is built against Jackson 3.1.4 and requires
jackson-annotations2.21, so those floors move with it;jackson-annotationsis shared throughmcp-core, so the Jackson 2 line is aligned to 2.21.1.How Has This Been Tested?
Two ways, independently:
DefaultJsonSchemaValidatorthrew before this change and constructs cleanly after it, for both the Jackson 2 and Jackson 3 modules.Module test suites pass locally.
Breaking Changes
None in the SDK itself (pom-only). The validator patch releases include upstream validation bug fixes, and the transitive Jackson floor rises (Jackson 3 → 3.1.4,
jackson-annotations→ 2.21, Jackson 2 → 2.21.1) — consumers pinning older Jackson will need to match it.Types of changes
Checklist
Additional context
pom-only change (5 version properties). The upstream regression was introduced in the schema-retrieval refactor (networknt/json-schema-validator#931) and affected every 2.x/3.x release until 2.0.4 / 3.0.6.