br: fix data race for the function IsLeaseExpired

[Leavrth]

What problem does this PR solve?

Issue Number: ref #57743 #59094

Problem Summary:
there is a data race in the function IsLeaseExpired

What changed and how does it work?

lock before get the variable.

Check List

Tests

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

  • I checked and no code files have been changed.

Side effects

• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Breaking backward compatibility

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Changes MySQL compatibility

Release note

Please refer to Release Notes Language Style Guide to write a quality release note.

None

[tiprow]

Hi @Leavrth. Thanks for your PR.

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[codecov]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.

Project coverage is 74.7956%. Comparing base (5ed9e63) to head (df86e52).
Report is 18 commits behind head on master.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #59098        +/-   ##
================================================
+ Coverage   73.0400%   74.7956%   +1.7555%     
================================================
  Files          1684       1730        +46     
  Lines        465705     475794     +10089     
================================================
+ Hits         340151     355873     +15722     
+ Misses       104635      97483      -7152     
- Partials      20919      22438      +1519     

Flag	Coverage Δ
integration	48.7093% <0.0000%> (?)
unit	72.2367% <0.0000%> (+0.0080%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
dumpling	52.6910% <ø> (ø)
parser	∅ <ø> (∅)
br	60.8739% <ø> (+15.5641%)	⬆️

[Tristan1900]

thanks for the fix!

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: Tristan1900
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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2025-01-21 16:26:23.102309186 +0000 UTC m=+198110.433228591: ☑️ agreed by Tristan1900.