Remove Vertx from KafkaRoller, KafkaAvailability and KafkaQuorumCheck

[tinaselenge]

Type of change

Select the type of your PR

• Refactoring

Description

Removes Vertx from KafkaRoller, KafkaAvailability, KafkaQuorumCheck and their test classes.

Checklist

Please go through this checklist and make sure all applicable tasks have been done

• Write tests
• Make sure all tests pass
• Update documentation
• Check RBAC rights for Kubernetes / OpenShift roles
• Try your changes from Pod inside your Kubernetes and OpenShift cluster, not just locally
• Reference relevant issue(s) and close them after merging
• Update CHANGELOG.md
• Supply screenshots for visual changes, such as Grafana dashboards

[codecov]

Codecov Report

❌ Patch coverage is 72.44094% with 35 lines in your changes missing coverage. Please review.
✅ Project coverage is 74.74%. Comparing base (2d31a2b) to head (1ca131a).
⚠️ Report is 29 commits behind head on main.

Files with missing lines	Patch %	Lines
...perator/cluster/operator/resource/KafkaRoller.java	62.50%	25 Missing and 5 partials ⚠️
...or/cluster/operator/resource/KafkaQuorumCheck.java	68.75%	3 Missing and 2 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main   #12356      +/-   ##
============================================
- Coverage     75.00%   74.74%   -0.27%     
+ Complexity     6646     6645       -1     
============================================
  Files           373      373              
  Lines         25361    25418      +57     
  Branches       3404     3417      +13     
============================================
- Hits          19023    18999      -24     
- Misses         4949     5022      +73     
- Partials       1389     1397       +8     

Files with missing lines	Coverage Δ
...erator/cluster/operator/assembly/CaReconciler.java	89.45% <100.00%> (-0.05%)	⬇️
...tor/cluster/operator/assembly/KafkaReconciler.java	94.60% <100.00%> (ø)
...r/cluster/operator/resource/KafkaAvailability.java	88.79% <100.00%> (+0.19%)	⬆️
...or/cluster/operator/resource/KafkaQuorumCheck.java	91.52% <68.75%> (-4.71%)	⬇️
...perator/cluster/operator/resource/KafkaRoller.java	60.69% <62.50%> (-16.70%)	⬇️

... and 19 files with indirect coverage changes

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[scholzj]

/gha run pipeline=upgrade,regression

[github-actions]

⏳ System test verification started: link

The following 10 job(s) will be executed:

• regression-brokers-and-security-amd64 (oracle-vm-8cpu-32gb-x86-64)
• regression-operators-amd64 (oracle-vm-8cpu-32gb-x86-64)
• regression-operands-amd64 (oracle-vm-8cpu-32gb-x86-64)
• regression-brokers-and-security-arm64 (oracle-vm-8cpu-32gb-arm64)
• regression-operators-arm64 (oracle-vm-8cpu-32gb-arm64)
• regression-operands-arm64 (oracle-vm-8cpu-32gb-arm64)
• upgrade-azp_kraft_upgrade-amd64 (oracle-vm-4cpu-16gb-x86-64)
• upgrade-azp_kafka_upgrade-amd64 (oracle-vm-4cpu-16gb-x86-64)
• upgrade-azp_kraft_upgrade-arm64 (oracle-vm-4cpu-16gb-arm64)
• upgrade-azp_kafka_upgrade-arm64 (oracle-vm-4cpu-16gb-arm64)

Tests will start after successful build completion.

[github-actions]

❌ System test verification failed: link

[github-actions]

🎉 System test verification passed: link

[scholzj]

Some more nits. LGTM otherwise.

[scholzj]

/gha run pipeline=regression

[github-actions]

⏳ System test verification started: link
Waiting for build to finish...

[scholzj]

@tinaselenge I triggers the STs. But then I realised that there is probably something wrong with the UT/ITs. There seem to be also many issues like this:

2026-02-10 18:48:31 INFO  KafkaRoller:359 - Reconciliation #991(initial-reconciliation) Kafka(testnoautorebalancingidlenoscaling/my-cluster): Will temporarily skip verifying pod my-cluster-controllers-10/10 is up-to-date due to java.lang.NullPointerException: Cannot invoke "org.apache.kafka.common.KafkaFuture.toCompletionStage()" because the return value of "java.util.Map.get(Object)" is null, retrying after at least 1000ms

I guess that could be some mocking issue.

[scholzj]

/gha run pipeline=regression

[github-actions]

⏳ System test verification started: link

The following 6 job(s) will be executed:

• regression-brokers-and-security-amd64 (oracle-vm-8cpu-32gb-x86-64)
• regression-operators-amd64 (oracle-vm-8cpu-32gb-x86-64)
• regression-operands-amd64 (oracle-vm-8cpu-32gb-x86-64)
• regression-brokers-and-security-arm64 (oracle-vm-8cpu-32gb-arm64)
• regression-operators-arm64 (oracle-vm-8cpu-32gb-arm64)
• regression-operands-arm64 (oracle-vm-8cpu-32gb-arm64)

Tests will start after successful build completion.

[github-actions]

🎉 System test verification passed: link