try fix data race

[hnes]

What problem does this PR solve?

Issue Number: ref #6045

What is changed and how does it work?

Try to fix a data race. See #6045 for more information.

Check List

Tests

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

Release note

None.

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• bufferflies
• lhy1024

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[ti-chi-bot]

Hi @hnes. Thanks for your PR.

I'm waiting for a tikv member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.08 🎉

Comparison is base (18a8356) 75.54% compared to head (ff013ea) 75.62%.

Additional details and impacted files

@@               Coverage Diff               @@
##           release-6.1    #6083      +/-   ##
===============================================
+ Coverage        75.54%   75.62%   +0.08%     
===============================================
  Files              307      307              
  Lines            30480    30480              
===============================================
+ Hits             23026    23051      +25     
+ Misses            5463     5448      -15     
+ Partials          1991     1981      -10     

Flag	Coverage Δ
unittests	75.62% <100.00%> (+0.08%)	⬆️

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

Impacted Files	Coverage Δ
server/cluster/cluster.go	82.61% <100.00%> (ø)
pkg/errs/errs.go	75.00% <0.00%> (-25.00%)	⬇️
...erver/config/service_middleware_persist_options.go	88.88% <0.00%> (-11.12%)	⬇️
server/schedulers/random_merge.go	60.00% <0.00%> (-3.34%)	⬇️
server/region_syncer/client.go	84.32% <0.00%> (-1.50%)	⬇️
server/tso/tso.go	71.75% <0.00%> (-1.13%)	⬇️
server/schedule/operator_controller.go	84.93% <0.00%> (-0.61%)	⬇️
server/schedulers/hot_region.go	83.04% <0.00%> (-0.30%)	⬇️
server/grpc_service.go	51.83% <0.00%> (-0.18%)	⬇️
server/tso/allocator_manager.go	65.89% <0.00%> (+0.33%)	⬆️
... and 12 more

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[lhy1024]

/ok-to-test

[bufferflies]

/merge

[ti-chi-bot]

@bufferflies: It seems you want to merge this PR, I will help you trigger all the tests:

/run-all-tests

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the ti-community-infra/tichi repository.

[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: ff013ea