==================
WARNING: DATA RACE
Read at 0x00c00936e380 by goroutine 290:
  github.com/pingcap/tidb/pkg/server.(*Server).Listener()
      pkg/server/server.go:159 +0x464
  pkg/server/tests/commontest/commontest_test.TestProxyProtocolWithIpNoFallbackable()
      pkg/server/tests/commontest/tidb_test.go:2974 +0x475
  github.com/pingcap/tidb/pkg/domain.(*Domain).rebuildSysVarCache()
      pkg/domain/sysvar_cache.go:146 +0x904
  github.com/pingcap/tidb/pkg/domain.(*Domain).LoadSysVarCacheLoop()
      pkg/domain/domain.go:1730 +0x93
  github.com/pingcap/tidb/pkg/session.bootstrapSessionImpl()
      pkg/session/session.go:3383 +0x844
  github.com/pingcap/tidb/pkg/domain.(*Domain).GetSessionCache()
      pkg/domain/sysvar_cache.go:62 +0x50
  github.com/pingcap/tidb/pkg/session.(*session).loadCommonGlobalVariablesIfNeeded()
      pkg/session/session.go:3751 +0x2ce
  github.com/pingcap/tidb/pkg/session.(*session).ExecuteStmt()
      pkg/session/session.go:2104 +0x184
  github.com/pingcap/tidb/pkg/session.(*session).ExecuteInternal()
      pkg/session/session.go:1619 +0x3b9
  github.com/pingcap/tidb/pkg/domain.(*Domain).LoadPrivilegeLoop()
      pkg/domain/domain.go:1673 +0x108
  github.com/pingcap/tidb/pkg/session.bootstrapSessionImpl()
      pkg/session/session.go:3376 +0x7e4
  github.com/pingcap/tidb/pkg/session.BootstrapSession()
      pkg/session/session.go:3283 +0x22a
  github.com/pingcap/tidb/pkg/server/tests/servertestkit.CreateTidbTestSuiteWithCfg()
      pkg/server/tests/servertestkit/testkit.go:69 +0x1b5
  github.com/pingcap/tidb/pkg/server/tests/servertestkit.CreateTidbTestSuite()
      pkg/server/tests/servertestkit/testkit.go:57 +0x1fa
  pkg/server/tests/commontest/commontest_test.TestProxyProtocolWithIpNoFallbackable()
      pkg/server/tests/commontest/tidb_test.go:2959 +0x231
  testing.tRunner()
      GOROOT/src/testing/testing.go:1595 +0x261
  testing.(*T).Run.func1()
      GOROOT/src/testing/testing.go:1648 +0x44
Previous write at 0x00c00936e380 by goroutine 37546:
  github.com/pingcap/tidb/pkg/server.(*Server).initTiDBListener()
      pkg/server/server.go:343 +0xbde
  github.com/pingcap/tidb/pkg/server.(*Server).Run()
      pkg/server/server.go:448 +0x4a7
  pkg/server/tests/commontest/commontest_test.TestProxyProtocolWithIpNoFallbackable.func1()
      pkg/server/tests/commontest/tidb_test.go:2966 +0x35
Goroutine 290 (running) created at:
  testing.(*T).Run()
      GOROOT/src/testing/testing.go:1648 +0x845
  testing.runTests.func1()
      GOROOT/src/testing/testing.go:2054 +0x84
  testing.tRunner()
      GOROOT/src/testing/testing.go:1595 +0x261
  testing.runTests()
      GOROOT/src/testing/testing.go:2052 +0x8ad
  testing.(*M).Run()
      GOROOT/src/testing/testing.go:1925 +0xcd7
  go.uber.org/goleak.VerifyTestMain()
      external/org_uber_go_goleak/testmain.go:53 +0x64
  pkg/server/tests/commontest/commontest_test.TestMain()
      pkg/server/tests/commontest/main_test.go:74 +0x100d
  main.main()
      bazel-out/k8-fastbuild/bin/pkg/server/tests/commontest/commontest_test_/testmain.go:217 +0x5d1
Goroutine 37546 (running) created at:
  pkg/server/tests/commontest/commontest_test.TestProxyProtocolWithIpNoFallbackable()
      pkg/server/tests/commontest/tidb_test.go:2965 +0x3d7
  github.com/pingcap/tidb/pkg/domain.(*Domain).rebuildSysVarCache()
      pkg/domain/sysvar_cache.go:146 +0x904
  github.com/pingcap/tidb/pkg/domain.(*Domain).LoadSysVarCacheLoop()
      pkg/domain/domain.go:1730 +0x93
  github.com/pingcap/tidb/pkg/session.bootstrapSessionImpl()
      pkg/session/session.go:3383 +0x844
  github.com/pingcap/tidb/pkg/domain.(*Domain).GetSessionCache()
      pkg/domain/sysvar_cache.go:62 +0x50
  github.com/pingcap/tidb/pkg/session.(*session).loadCommonGlobalVariablesIfNeeded()
      pkg/session/session.go:3751 +0x2ce
  github.com/pingcap/tidb/pkg/session.(*session).ExecuteStmt()
      pkg/session/session.go:2104 +0x184
  github.com/pingcap/tidb/pkg/session.(*session).ExecuteInternal()
      pkg/session/session.go:1619 +0x3b9
  github.com/pingcap/tidb/pkg/domain.(*Domain).LoadPrivilegeLoop()
      pkg/domain/domain.go:1673 +0x108
  github.com/pingcap/tidb/pkg/session.bootstrapSessionImpl()
      pkg/session/session.go:3376 +0x7e4
  github.com/pingcap/tidb/pkg/session.BootstrapSession()
      pkg/session/session.go:3283 +0x22a
  github.com/pingcap/tidb/pkg/server/tests/servertestkit.CreateTidbTestSuiteWithCfg()
      pkg/server/tests/servertestkit/testkit.go:69 +0x1b5
  github.com/pingcap/tidb/pkg/server/tests/servertestkit.CreateTidbTestSuite()
      pkg/server/tests/servertestkit/testkit.go:57 +0x1fa
  pkg/server/tests/commontest/commontest_test.TestProxyProtocolWithIpNoFallbackable()
      pkg/server/tests/commontest/tidb_test.go:2959 +0x231
  testing.tRunner()
      GOROOT/src/testing/testing.go:1595 +0x261
  testing.(*T).Run.func1()
      GOROOT/src/testing/testing.go:1648 +0x44
==================