deps: Bump tikv client 6125c3b

[pingyu]

What problem does this PR solve?

Issue Number: close #5440

What is changed and how it works?

Bump tikv/client-go to 6125c3b to support resolving txn file locks.

Ref: tikv/client-go#2003

Check List

Tests

• Integration tests with nextgen cluster

TiCDC logs:

[2026/06/18 05:01:27.112 +00:00] [INFO] [lock_resolver.go:1530] ["txn lock cleanup resolve-region rpc finished"] [action=commit] [txnStartTS=467077400967512072] [commitTS=467077401675301177] [regionID=9265] [keyCount=8]
[2026/06/18 05:01:27.114 +00:00] [DEBUG] [lock_resolver.go:95] ["resolve lock finishes"] [regionID=9265] [lockCount=8] [sampleLocks="[{\"Key\":\"dIAAAAAAAACCX2mAAAAAAAAAAgOAAAAAAAAAAQOAAAAAAAAAAwOAAAAAAAAAAQOAAAAAAAAADgOAAAAAAAAAAQOAAAAAAAAAAwOAAAAAAAAADg==\",\"Primary\":\"dIAAAAAAAACCX2mAAAAAAAAAAgOAAAAAAAAAAQOAAAAAAAAAAwOAAAAAAAAAAQOAAAAAAAAADgOAAAAAAAAAAQOAAAAAAAAAAwOAAAAAAAAADg==\",\"TxnID\":467077400967512072,\"TTL\":3999,\"TxnSize\":8,\"LockType\":0,\"UseAsyncCommit\":false,\"LockForUpdateTS\":0,\"MinCommitTS\":0,\"IsTxnFile\":true},{\"Key\":\"dIAAAAAAAACCX2mAAAAAAAAAAgOAAAAAAAAAAQOAAAAAAAAAAwOAAAAAAAAAAgOAAAAAAAAADQOAAAAAAAAAAQOAAAAAAAAAAwOAAAAAAAAADQ==\",\"Primary\":\"dIAAAAAAAACCX2mAAAAAAAAAAgOAAAAAAAAAAQOAAAAAAAAAAwOAAAAAAAAAAQOAAAAAAAAADgOAAAAAAAAAAQOAAAAAAAAAAwOAAAAAAAAADg==\",\"TxnID\":467077400967512072,\"TTL\":3999,\"TxnSize\":8,\"LockType\":0,\"UseAsyncCommit\":false,\"LockForUpdateTS\":0,\"MinCommitTS\":0,\"IsTxnFile\":true},{\"Key\":\"dIAAAAAAAACCX2mAAAAAAAAAAgOAAAAAAAAAAQOAAAAAAAAAAwOAAAAAAAAAAwOAAAAAAAAABwOAAAAAAAAAAQOAAAAAAAAAAwOAAAAAAAAABw==\",\"Primary\":\"dIAAAAAAAACCX2mAAAAAAAAAAgOAAAAAAAAAAQOAAAAAAAAAAwOAAAAAAAAAAQOAAAAAAAAADgOAAAAAAAAAAQOAAAAAAAAAAwOAAAAAAAAADg==\",\"TxnID\":467077400967512072,\"TTL\":3999,\"TxnSize\":8,\"LockType\":0,\"UseAsyncCommit\":false,\"LockForUpdateTS\":0,\"MinCommitTS\":0,\"IsTxnFile\":true},{\"Key\":\"dIAAAAAAAACCX2mAAAAAAAAAAgOAAAAAAAAAAQOAAAAAAAAAAwOAAAAAAAAABAOAAAAAAAAABAOAAAAAAAAAAQOAAAAAAAAAAwOAAAAAAAAABA==\",\"Primary\":\"dIAAAAAAAACCX2mAAAAAAAAAAgOAAAAAAAAAAQOAAAAAAAAAAwOAAAAAAAAAAQOAAAAAAAAADgOAAAAAAAAAAQOAAAAAAAAAAwOAAAAAAAAADg==\",\"TxnID\":467077400967512072,\"TTL\":3999,\"TxnSize\":8,\"LockType\":0,\"UseAsyncCommit\":false,\"LockForUpdateTS\":0,\"MinCommitTS\":0,\"IsTxnFile\":true},{\"Key\":\"dIAAAAAAAACCX2mAAAAAAAAAAgOAAAAAAAAAAQOAAAAAAAAAAwOAAAAAAAAABQOAAAAAAAAAGgOAAAAAAAAAAQOAAAAAAAAAAwOAAAAAAAAAGg==\",\"Primary\":\"dIAAAAAAAACCX2mAAAAAAAAAAgOAAAAAAAAAAQOAAAAAAAAAAwOAAAAAAAAAAQOAAAAAAAAADgOAAAAAAAAAAQOAAAAAAAAAAwOAAAAAAAAADg==\",\"TxnID\":467077400967512072,\"TTL\":3999,\"TxnSize\":8,\"LockType\":0,\"UseAsyncCommit\":false,\"LockForUpdateTS\":0,\"MinCommitTS\":0,\"IsTxnFile\":true}]"] [maxVersion=467077401124798464] [duration=7.47611ms] []

Questions

Will it cause performance regression or break compatibility?

No.

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

No.

Release note

Bump tikv/client-go to 6125c3b to support resolving txn file locks.

Summary by CodeRabbit

• Chores
  • Updated dependency version for improved stability and compatibility.

[coderabbitai]

📝 Walkthrough

Walkthrough

The go.mod file updates the github.com/tikv/client-go/v2 dependency from pseudo-version v2.0.8-0.20260609070524-8df1c02428d9 to v2.0.8-0.20260618054307-6125c3b05c6c. No other files or dependencies are modified.

Changes

tikv/client-go/v2 Dependency Bump

Layer / File(s)	Summary
tikv/client-go/v2 version bump go.mod	Updates github.com/tikv/client-go/v2 pseudo-version to the commit dated 2026-06-18 (6125c3b05c6c), replacing the prior commit from 2026-06-09.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Possibly related PRs

• pingcap/ticdc#5205: Also bumps github.com/tikv/client-go/v2 to a newer pseudo-version in go.mod, making it a direct predecessor of this change.

Suggested labels

size/S

Suggested reviewers

• wk989898
• 3AceShowHand

Poem

A hop, a skip, a version bump so small,
The tikv client leaps to a new commit's call,
From June the ninth to eighteenth it goes,
A tiny diff, yet forward the codebase flows,
🐇 One line changed, and all is well! 🎉

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title directly references the dependency update with the specific commit hash (6125c3b), accurately summarizing the main change in the PR.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Description check	✅ Passed	The pull request description includes all required sections: issue reference, explanation of changes, test verification, and compatibility/documentation answers.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[gemini-code-assist]

Code Review

This pull request updates the github.com/tikv/client-go/v2 dependency to a newer commit hash in go.mod and go.sum. There are no review comments, and I have no feedback to provide.

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[pingyu]

/cc @tenfyzhong

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

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

The full list of commands accepted by this bot can be found here.

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Details

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• OWNERS [tenfyzhong,wk989898]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2026-06-18 08:49:51.44603788 +0000 UTC m=+1641092.516355270: ☑️ agreed by wk989898.
• 2026-06-22 02:19:46.712837759 +0000 UTC m=+1963287.783155149: ☑️ agreed by tenfyzhong.

[tenfyzhong]

/check-issue-triage-complete

[tenfyzhong]

/test all

[pingyu]

/test pull-cdc-mysql-integration-light

[pingyu]

/cherry-pick release-nextgen-202603

[ti-chi-bot]

@pingyu: new pull request created to branch release-nextgen-202603: #5507.

Details

In response to this:

/cherry-pick release-nextgen-202603

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