[3AceShowHand]

What problem does this PR solve?

Issue Number: close #6359

What is changed and how it works?

normalize the timeout 10s ~ 15m

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Questions

Will it cause performance regression or break compatibility?

Do you need to update user documentation, design documentation or monitoring documentation?

Release note

`None`

Summary by CodeRabbit

• Improvements
  • Kafka dashboards now show producer compression ratios and broker-level request rates, with latency and throttle-time values displayed in seconds.
  • Kafka read and write timeouts are now normalized to a range of 10 seconds to 15 minutes.
  • Kafka topic warnings now include the related changefeed and topic.
• Dashboard Changes
  • Removed the Kafka response-rate panel.

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Review configuration:

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Advanced

Run ID: 08c3d3fc-0ac2-4303-aa68-c3a3f3caf554

📥 Commits

Reviewing files that changed from the base of the PR and between 8f78cab and 1f87bcc.

📒 Files selected for processing (7)

• metrics/grafana/ticdc_new_arch.json
• metrics/nextgengrafana/ticdc_new_arch_next_gen.json
• metrics/nextgengrafana/ticdc_new_arch_with_keyspace_name.json
• pkg/sink/kafka/franz_metrics.go
• pkg/sink/kafka/franz_metrics_hook.go
• pkg/sink/kafka/franz_metrics_hook_test.go
• pkg/sink/kafka/metrics.go

📝 Walkthrough

Walkthrough

The Kafka sink now logs changefeed context for ignored topic metadata errors and normalizes Franz timeout values. Its producer metrics and related dashboard queries also change, including request labels, compression-ratio measurements, and selected dashboard panels and units.

Changes

Topic metadata logging

Layer / File(s)	Summary
Add context to topic metadata warnings pkg/sink/kafka/franz_admin.go, pkg/sink/kafka/franz_admin_test.go	topicDetailsFromMetadata receives the changefeed ID. Warnings for missing topics and topics with errors include changefeed and topic fields when errors are ignored. The test call passes a changefeed ID.

Franz timeout normalization

Layer / File(s)	Summary
Clamp client and producer timeouts pkg/sink/kafka/options.go, pkg/sink/kafka/options_test.go, pkg/sink/kafka/franz_config_test.go	Franz read and write timeouts are clamped to 10 seconds through 15 minutes during Apply. Tests cover values below and above the bounds, in-range values, and unchanged Sarama timeout values.

Kafka producer metrics

Layer / File(s)	Summary
Define and record producer metrics pkg/sink/kafka/franz_metrics.go, pkg/sink/kafka/franz_metrics_hook.go, pkg/sink/kafka/metrics.go, pkg/sink/kafka/franz_metrics_hook_test.go	Producer metrics use the kafka_producer_ prefix. Request counts no longer use a result label. Eligible batches record a compression ratio instead of separate compressed and uncompressed byte totals. Response counters are removed, and tests cover the updated observations and cleanup.
Update Kafka producer dashboards metrics/grafana/ticdc_new_arch.json, metrics/nextgengrafana/ticdc_new_arch_next_gen.json, metrics/nextgengrafana/ticdc_new_arch_with_keyspace_name.json	Dashboard queries use the updated producer metrics. Request-rate grouping and compression-ratio calculations change. Two Sink V2 dashboards remove their response-rate panels. The Grafana dashboard also changes latency and throttle-time units and broker grouping.

Priority: ➖ Normal

Estimated code review effort: 3 (Moderate) | ~25 minutes

Change: Bug fix · Severity of issue fixed: Medium

Merge Risk: 🟡 Moderate · up to 8f78c

The Kafka sink changes look sound. However, the next-gen Grafana dashboards were not regenerated from the updated source dashboard. As a result, they show stale units and aggregation, and the dashboard consistency check in CI fails. Regenerate the dashboards before merging.

🚥 Pre-merge checks | ✅ 3 | ❌ 2

❌ Failed checks (2 warnings)

Check name	Status	Explanation	Resolution
Out of Scope Changes check	⚠️ Warning	The PR also changes Franz Kafka metrics, metric registration and hooks, dashboard queries, compression-ratio reporting, response metrics, and topic-metadata warning logs. These changes do not implemen…	Remove the unrelated metrics, dashboard, and topic-metadata logging changes from this PR, or link them to a separate coding issue and submit them in a separate PR.
Docstring Coverage	⚠️ Warning	Docstring coverage is 20.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 15 functions across 10 files. (3 skipped:…	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly summarizes the primary change: normalizing franz-go Kafka timeouts to the 10-second to 15-minute range.
Description check	✅ Passed	The description includes the issue number, a change summary, test coverage, and a release-note decision. The compatibility and documentation questions are left blank, but the description is otherwise …
Linked Issues check	✅ Passed	The PR implements issue #6359. pkg/sink/kafka/options.go adds normalizeTimeout, clamps Franz timeouts to 10 seconds through 15 minutes, and applies the clamp to both WriteTimeout and `ReadTimeou…

Full details: Out of Scope Changes check

Explanation

The PR also changes Franz Kafka metrics, metric registration and hooks, dashboard queries, compression-ratio reporting, response metrics, and topic-metadata warning logs. These changes do not implement the timeout objective in issue #6359. The dashboard changes support the metric changes, but neither change addresses timeout normalization.

Full details: Docstring Coverage

Explanation

Docstring coverage is 20.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 15 functions across 10 files. (3 skipped: 3 unsupported.)

✨ Finishing Touches 💡 1

🛠️ Fix failing CI checks 💡

• Commit to this branch
• Create a new PR

🧪 Generate unit tests (beta)

• Create a new PR

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_{A rabbit checks the Kafka stream,
And logs the topics by their name.
It bounds the timeouts, neat and right,
Then charts new batches through the night.
Its carrots crunch in metrics light.}

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[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: lidezhu, wk989898

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Details

Needs approval from an approver in each of these files:

• OWNERS [lidezhu,wk989898]

Approvers can indicate their approval by writing /approve in a comment
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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2026-09-23 09:39:57.649709354 +0000 UTC m=+184122.874930460: ☑️ agreed by lidezhu.
• 2026-09-23 10:12:33.733040249 +0000 UTC m=+186078.958261356: ☑️ agreed by wk989898.

[3AceShowHand]

/test all

[3AceShowHand]

/test all

[coderabbitai]

Actionable comments posted: 1

---

• 🪄 Fix CodeRabbit comments on this PR

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only still-valid issues, skip the rest with a brief reason, keep changes
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Inline comments:
In `@metrics/nextgengrafana/ticdc_new_arch_next_gen.json`:
- Line 28413: Regenerate the Next Gen Grafana dashboard using the project’s
dashboard generation flow and commit the updated generated content so it matches
the source and passes the dashboard consistency check.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Advanced

Run ID: ab628203-9f75-4ca5-9485-8b916d2c7270

📥 Commits

Reviewing files that changed from the base of the PR and between 8aad65a and 8f78cab.

📒 Files selected for processing (10)

• metrics/grafana/ticdc_new_arch.json
• metrics/nextgengrafana/ticdc_new_arch_next_gen.json
• metrics/nextgengrafana/ticdc_new_arch_with_keyspace_name.json
• pkg/sink/kafka/franz_config_test.go
• pkg/sink/kafka/franz_metrics.go
• pkg/sink/kafka/franz_metrics_hook.go
• pkg/sink/kafka/franz_metrics_hook_test.go
• pkg/sink/kafka/metrics.go
• pkg/sink/kafka/options.go
• pkg/sink/kafka/options_test.go

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[3AceShowHand]

/test all

[3AceShowHand]

/retest

[3AceShowHand]

/retest

[3AceShowHand]

/cherry-pick release-nextgen-202609

[ti-chi-bot]

@3AceShowHand: new pull request created to branch release-nextgen-202609: #6399.

Details

In response to this:

/cherry-pick release-nextgen-202609

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[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-8.5: #6412.
But this PR has conflicts, please resolve them!