Data race in TestConfigForward

[rleungx]

Flaky Test

Which jobs are failing

==================
WARNING: DATA RACE
Write at 0x00c001cddb88 by goroutine 32832:
  github.com/tikv/pd/tests/integrations/mcs/scheduling_test.(*apiTestSuite).checkConfigForward()
      /home/runner/work/pd/pd/tests/integrations/mcs/scheduling/api_test.go:[437](https://github.com/tikv/pd/actions/runs/11007523642/job/30563564848?pr=8632#step:4:438) +0x74c
  github.com/tikv/pd/tests/integrations/mcs/scheduling_test.(*apiTestSuite).checkConfigForward-fm()
      <autogenerated>:1 +0x3d
  github.com/tikv/pd/tests.(*SchedulingTestEnvironment).RunTestInAPIMode()
      /home/runner/work/pd/pd/tests/testutil.go:371 +0x31c
  github.com/pingcap/failpoint.parseTerm()
      /home/runner/go/pkg/mod/github.com/pingcap/[email protected]/terms.go:149 +0x364
  github.com/pingcap/failpoint.parse()
      /home/runner/go/pkg/mod/github.com/pingcap/[email protected]/terms.go:126 +0xa5
  github.com/pingcap/failpoint.newTerms()
      /home/runner/go/pkg/mod/github.com/pingcap/[email protected]/terms.go:98 +0x3e
  github.com/pingcap/failpoint.(*Failpoint).Enable()
      /home/runner/go/pkg/mod/github.com/stretchr/[email protected]/suite/suite.go:247 +0x186
  github.com/stretchr/testify/suite.Run()
      /home/runner/go/pkg/mod/github.com/stretchr/[email protected]/suite/suite.go:220 +0xa4e
  github.com/pingcap/failpoint.parse()
      /home/runner/go/pkg/mod/github.com/pingcap/[email protected]/terms.go:126 +0xa5
  github.com/pingcap/failpoint.newTerms()
      /home/runner/go/pkg/mod/github.com/pingcap/[email protected]/terms.go:98 +0x3e
  github.com/pingcap/failpoint.(*Failpoint).Enable()
      /home/runner/go/pkg/mod/github.com/pingcap/[email protected]/failpoint.go:54 +0x3e
  github.com/pingcap/failpoint.(*Failpoints).Enable()
      /home/runner/go/pkg/mod/github.com/pingcap/[email protected]/failpoints.go:105 +0x296
  github.com/pingcap/failpoint.Enable()
      /home/runner/go/pkg/mod/github.com/pingcap/[email protected]/failpoints.go:222 +0x94
  github.com/tikv/pd/tests/integrations/mcs/scheduling_test.(*apiTestSuite).SetupSuite()
      /home/runner/work/pd/pd/tests/integrations/mcs/scheduling/api_test.go:44 +0x95
  github.com/pingcap/failpoint.parseTerm()
      /home/runner/go/pkg/mod/github.com/pingcap/[email protected]/terms.go:149 +0x364
  github.com/pingcap/failpoint.parse()
      /home/runner/go/pkg/mod/github.com/pingcap/[email protected]/terms.go:126 +0xa5
  github.com/pingcap/failpoint.newTerms()
      /home/runner/go/pkg/mod/github.com/pingcap/[email protected]/terms.go:98 +0x3e
  github.com/pingcap/failpoint.(*Failpoint).Enable()
      /home/runner/go/pkg/mod/github.com/pingcap/[email protected]/failpoint.go:54 +0x3e
  github.com/pingcap/failpoint.(*Failpoints).Enable()
      /home/runner/go/pkg/mod/github.com/pingcap/[email protected]/failpoints.go:105 +0x296
  github.com/pingcap/failpoint.Enable()
      /home/runner/go/pkg/mod/github.com/pingcap/[email protected]/failpoints.go:222 +0x59
  github.com/tikv/pd/tests/integrations/mcs/scheduling_test.(*apiTestSuite).SetupSuite()
      /home/runner/work/pd/pd/tests/integrations/mcs/scheduling/api_test.go:43 +0x5a
  github.com/stretchr/testify/suite.Run()
      /home/runner/go/pkg/mod/github.com/stretchr/[email protected]/suite/suite.go:157 +0x63e
  github.com/tikv/pd/tests/integrations/mcs/scheduling_test.TestAPI()
      /home/runner/work/pd/pd/tests/integrations/mcs/scheduling/api_test.go:38 +0x3c
  testing.tRunner()
      /opt/hostedtoolcache/go/1.21.13/x64/src/testing/testing.go:1595 +0x261
  testing.(*T).Run.func1()
      /opt/hostedtoolcache/go/1.21.13/x64/src/testing/testing.go:1648 +0x44

Goroutine 7247 (running) created at:
  github.com/tikv/pd/pkg/schedule/schedulers.(*Controller).AddScheduler()
      /home/runner/work/pd/pd/pkg/schedule/schedulers/scheduler_controller.go:215 +0x42b
  github.com/tikv/pd/pkg/schedule.(*Coordinator).InitSchedulers()
      /home/runner/work/pd/pd/pkg/schedule/coordinator.go:300 +0x1aab
  github.com/tikv/pd/pkg/schedule.(*Coordinator).Run()
      /home/runner/work/pd/pd/pkg/schedule/coordinator.go:237 +0x3e4
  github.com/tikv/pd/pkg/schedule.(*Coordinator).RunUntilStop()
      /home/runner/work/pd/pd/pkg/schedule/coordinator.go:208 +0x91
  github.com/tikv/pd/pkg/mcs/scheduling/server.(*Cluster).runCoordinator()
      /home/runner/work/pd/pd/pkg/mcs/scheduling/server/cluster.go:497 +0x24a
  github.com/tikv/pd/pkg/mcs/scheduling/server.(*Cluster).StartBackgroundJobs.func3()
      /home/runner/work/pd/pd/pkg/mcs/scheduling/server/cluster.go:553 +0x33
==================

CI link

https://github.com/tikv/pd/actions/runs/11007523642/job/30563564848?pr=8632

Reason for failure (if possible)

Anything else