==================
WARNING: DATA RACE
Write at 0x00c012ba5f20 by goroutine 203558:
  github.com/pingcap/tidb/domain.(*Domain).StartTTLJobManager.func1()
      domain/domain.go:2497 +0x164
  github.com/pingcap/tidb/util.(*WaitGroupEnhancedWrapper).Run.func1()
      util/wait_group_wrapper.go:96 +0xb7
Previous read at 0x00c012ba5f20 by goroutine 188274:
  github.com/pingcap/tidb/domain.(*Domain).TTLJobManager()
      domain/domain.go:2512 +0x8f
  github.com/pingcap/tidb/ttl/ttlworker_test.waitAndStopTTLManager()
      ttl/ttlworker/job_manager_integration_test.go:486 +0x9d
  github.com/pingcap/tidb/ttl/ttlworker_test.TestTaskScheduleExpireHeartBeat()
      ttl/ttlworker/task_manager_integration_test.go:158 +0x84
  github.com/pingcap/tidb/domain.(*Domain).rebuildSysVarCache()
      domain/sysvar_cache.go:146 +0x844
  github.com/pingcap/tidb/domain.(*Domain).LoadSysVarCacheLoop()
      domain/domain.go:1384 +0xa8
  github.com/pingcap/tidb/session.BootstrapSession()
      session/session.go:3337 +0x693
  github.com/pingcap/tidb/domain.(*Domain).GetSessionCache()
      domain/sysvar_cache.go:62 +0x59
  github.com/pingcap/tidb/session.(*session).loadCommonGlobalVariablesIfNeeded()
      session/session.go:3656 +0x104
  github.com/pingcap/tidb/session.(*session).ExecuteStmt()
      session/session.go:2134 +0x2a5
  github.com/pingcap/tidb/session.(*session).ExecuteInternal()
      session/session.go:1668 +0x471
  github.com/pingcap/tidb/domain.(*Domain).LoadPrivilegeLoop()
      domain/domain.go:1328 +0x130
  github.com/pingcap/tidb/session.BootstrapSession()
      session/session.go:3330 +0x644
  github.com/pingcap/tidb/testkit.bootstrap()
      testkit/mockstore.go:85 +0xac
  github.com/pingcap/tidb/testkit.CreateMockStoreAndDomain()
      testkit/mockstore.go:70 +0xe9
  github.com/pingcap/tidb/ttl/ttlworker_test.TestTaskScheduleExpireHeartBeat()
      ttl/ttlworker/task_manager_integration_test.go:157 +0x58
  testing.tRunner()
      GOROOT/src/testing/testing.go:1446 +0x216
  testing.(*T).Run.func1()
      GOROOT/src/testing/testing.go:1493 +0x47
Goroutine 203558 (running) created at:
  github.com/pingcap/tidb/util.(*WaitGroupEnhancedWrapper).Run()
      util/wait_group_wrapper.go:91 +0x147
  github.com/pingcap/tidb/domain.(*Domain).StartTTLJobManager()
      domain/domain.go:2491 +0xb7
  github.com/pingcap/tidb/session.BootstrapSession()
      session/session.go:3440 +0x1684
  github.com/pingcap/tidb/domain.(*Domain).rebuildSysVarCache()
      domain/sysvar_cache.go:147 +0x8d0
  github.com/pingcap/tidb/sessionctx/variable.glob..func168()
      sessionctx/variable/sysvar.go:882 +0x5e
  github.com/pingcap/tidb/sessionctx/variable.(*SysVar).ValidateWithRelaxedValidation()
      sessionctx/variable/variable.go:361 +0x1c7
  github.com/pingcap/tidb/domain.(*Domain).rebuildSysVarCache()
      domain/sysvar_cache.go:146 +0x844
  github.com/pingcap/tidb/domain.(*Domain).LoadSysVarCacheLoop()
      domain/domain.go:1384 +0xa8
  github.com/pingcap/tidb/session.BootstrapSession()
      session/session.go:3337 +0x693
  github.com/pingcap/tidb/domain.(*Domain).GetSessionCache()
      domain/sysvar_cache.go:62 +0x59
  github.com/pingcap/tidb/session.(*session).loadCommonGlobalVariablesIfNeeded()
      session/session.go:3656 +0x104
  github.com/pingcap/tidb/session.(*session).ExecuteStmt()
      session/session.go:2134 +0x2a5
  github.com/pingcap/tidb/session.(*session).ExecuteInternal()
      session/session.go:1668 +0x471
  github.com/pingcap/tidb/domain.(*Domain).LoadPrivilegeLoop()
      domain/domain.go:1328 +0x130
  github.com/pingcap/tidb/session.BootstrapSession()
      session/session.go:3330 +0x644
  github.com/pingcap/tidb/testkit.bootstrap()
      testkit/mockstore.go:85 +0xac
  github.com/pingcap/tidb/testkit.CreateMockStoreAndDomain()
      testkit/mockstore.go:70 +0xe9
  github.com/pingcap/tidb/ttl/ttlworker_test.TestTaskScheduleExpireHeartBeat()
      ttl/ttlworker/task_manager_integration_test.go:157 +0x58
  testing.tRunner()
      GOROOT/src/testing/testing.go:1446 +0x216
  testing.(*T).Run.func1()
      GOROOT/src/testing/testing.go:1493 +0x47
Goroutine 188274 (running) created at:
  testing.(*T).Run()
      GOROOT/src/testing/testing.go:1493 +0x75d
  testing.runTests.func1()
      GOROOT/src/testing/testing.go:1846 +0x99
  testing.tRunner()
      GOROOT/src/testing/testing.go:1446 +0x216
  testing.runTests()
      GOROOT/src/testing/testing.go:1844 +0x7ec
  testing.(*M).Run()
      GOROOT/src/testing/testing.go:1726 +0xa84
  main.main()
      bazel-out/k8-fastbuild/bin/ttl/ttlworker/ttlworker_test_/testmain.go:156 +0x5d0
==================