Update jackson to 2.21.6

[donoghuc]

Release notes

Update jackson to 2.21.6

What does this PR do?

Get the latests 2.21 LTS for jackson in logstash core.

Relates: #19440

[github-actions]

🤖 GitHub comments

Just comment with:

• run docs-build : Re-trigger the docs validation. (use unformatted text in the comment!)
• run exhaustive tests : Run the exhaustive tests Buildkite pipeline.

[Copilot]

Pull request overview

This PR updates Logstash core’s Jackson dependencies to the latest 2.21 LTS patch release and adjusts the repository’s notice text for the affected Jackson artifacts.

Changes:

• Bump jackson and jackson-databind from 2.21.4 to 2.21.6, and bump jrjackson from 0.5.2 to 0.5.3 in versions.yml.
• Update NOTICE.TXT entries for Jackson artifacts to reflect 2.21.6.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
versions.yml	Updates the single source-of-truth versions for Jackson and JrJackson used by core build/gemspec wiring.
NOTICE.TXT	Updates notice headers for Jackson components to match the new 2.21.6 versions.

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[mergify]

This pull request does not have a backport label. Could you fix it @donoghuc? 🙏
To fixup this pull request, you need to add the backport labels for the needed
branches, such as:

• backport-8./d is the label to automatically backport to the 8./d branch. /d is the digit.
• If no backport is necessary, please add the backport-skip label

[github-actions]

TL;DR

Buildkite failures are caused by dependency resolution during :bootstrap, not by test logic. This PR pins jrjackson to 0.5.3, but that gem version is not published on RubyGems, so all Ruby-backed test jobs fail before tests start.

Remediation

• Change jrjackson in versions.yml back to an available version (currently 0.5.2) or publish jrjackson 0.5.3 before merging this PR.
• Re-run the Buildkite pipeline after the dependency pin is corrected; :bootstrap must complete before unit/integration jobs can execute.

Investigation details

Root Cause

logstash-core hard-pins jrjackson from versions.yml in its gemspec (logstash-core/logstash-core.gemspec:79).
In this PR head, versions.yml sets jrjackson: 0.5.3 (versions.yml:30 on 1a2a188).
During Buildkite bootstrap, Bundler solver fails because jrjackson 0.5.3 is unavailable, so jobs abort before running test suites.

Evidence

• Build: https://buildkite.com/elastic/logstash-pull-request-pipeline/builds/5198
• Jobs/steps (examples): :rspec: Ruby unit tests, :lab_coat: Integration Tests / part 1-of-6, :lab_coat: x-pack unit tests
• Key log excerpt (same failure across jobs):

Execution failed for task ':bootstrap'.
> (SolveFailure) Could not find compatible versions
  Because every version of logstash-core depends on jrjackson = 0.5.3
  and jrjackson = 0.5.3 could not be found in rubygems repository https://rubygems.org/ or installed locally,
  logstash-core cannot be used.

• Log references:
  • /tmp/gh-aw/buildkite-logs/logstash-pull-request-pipeline-rspec-ruby-unit-tests.txt:75-89
  • /tmp/gh-aw/buildkite-logs/logstash-pull-request-pipeline-lab_coat-integration-tests-part-1-of-6.txt:95-109
  • /tmp/gh-aw/buildkite-logs/logstash-pull-request-pipeline-lab_coat-x-pack-unit-tests.txt:101-115

Verification

• Confirmed PR diff updates versions.yml to jrjackson: 0.5.3.
• Confirmed Rubygems versions list for jrjackson does not include 0.5.3 (latest visible: 0.5.2).

Follow-up

If the intent is to consume newer Jackson artifacts, keep Jackson updates but align to a released jrjackson version (or release the required jrjackson first).

---

What is this? | From workflow: PR Buildkite Detective

Give us feedback! React with 🚀 if perfect, 👍 if helpful, 👎 if not.

[yaauie]

As noted by copilot, the notice for jrJackson will need to be updated. Other than that, LGTM.

[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated no new comments.

Suppressed comments (1)

NOTICE.TXT:3931

• NOTICE.TXT appears to be generated by the dependencies audit tool from per-dependency notice templates (see tools/dependencies-report/README.md:9-11). This PR updates the jrjackson notice here to v0.5.3, but the source template tools/dependencies-report/src/main/resources/notices/jrjackson-NOTICE.txt still points to v0.4.6, so regenerating NOTICE.TXT would revert this change.

Notice for: jrjackson-0.5.3
----------

https://github.com/guyboertje/jrjackson/blob/v0.5.3/README.md

[infra-vault-gh-plugin-prod]

⏳ Build in-progress, with failures

• Buildkite Build
• Commit: 1f72b72

Failed CI Steps

• 🛂 License check
• 🛂 License check
• 🛂 License check
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• Observability SRE container build
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• 🥼 x-pack unit tests
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History

• 💔 Build #5198 failed 1a2a188