Datarace in TestTSOKeyspaceGroupMerge

[lhy1024]

Flaky Test

Which jobs are failing

TestTSOKeyspaceGroupMerge

2023-06-29T12:00:49.5749865Z ==================
2023-06-29T12:00:49.5750143Z WARNING: DATA RACE
2023-06-29T12:00:49.5750477Z Write at 0x00c0077df1c0 by goroutine 90074:
2023-06-29T12:00:49.5751019Z   github.com/tikv/pd/pkg/tso.(*KeyspaceGroupManager).finishMergeKeyspaceGroup()
2023-06-29T12:00:49.5751730Z       /home/runner/work/pd/pd/pkg/tso/keyspace_group_manager.go:1152 +0x558
2023-06-29T12:00:49.5752278Z   github.com/tikv/pd/pkg/tso.(*KeyspaceGroupManager).mergingChecker()
2023-06-29T12:00:49.5752954Z       /home/runner/work/pd/pd/pkg/tso/keyspace_group_manager.go:1274 +0x34cf
2023-06-29T12:00:49.5753558Z   github.com/tikv/pd/pkg/tso.(*KeyspaceGroupManager).updateKeyspaceGroup.func2()
2023-06-29T12:00:49.5754379Z       /home/runner/work/pd/pd/pkg/tso/keyspace_group_manager.go:631 +0x96
2023-06-29T12:00:49.5754623Z 
2023-06-29T12:00:49.5754812Z Previous read at 0x00c0077df1c0 by goroutine 92722:
2023-06-29T12:00:49.5755478Z   github.com/tikv/pd/pkg/storage/endpoint.(*KeyspaceGroup).IsMerging()
2023-06-29T12:00:49.5756170Z       /home/runner/work/pd/pd/pkg/storage/endpoint/tso_keyspace_group.go:140 +0xf0
2023-06-29T12:00:49.5756722Z   github.com/tikv/pd/pkg/tso.(*KeyspaceGroupManager).checkTSOMerge()
2023-06-29T12:00:49.5757396Z       /home/runner/work/pd/pd/pkg/tso/keyspace_group_manager.go:1298 +0xfb
2023-06-29T12:00:49.5757954Z   github.com/tikv/pd/pkg/tso.(*KeyspaceGroupManager).HandleTSORequest()
2023-06-29T12:00:49.5758775Z       /home/runner/work/pd/pd/pkg/tso/keyspace_group_manager.go:962 +0x16f
2023-06-29T12:00:49.5759419Z   github.com/tikv/pd/tests/integrations/mcs/tso.(*tsoKeyspaceGroupManagerTestSuite).requestTSO()
2023-06-29T12:00:49.5760249Z       /home/runner/work/pd/pd/tests/integrations/mcs/tso/keyspace_group_manager_test.go:301 +0x158
2023-06-29T12:00:49.5761025Z   github.com/tikv/pd/tests/integrations/mcs/tso.(*tsoKeyspaceGroupManagerTestSuite).TestTSOKeyspaceGroupMerge.func2()
2023-06-29T12:00:49.5761892Z       /home/runner/work/pd/pd/tests/integrations/mcs/tso/keyspace_group_manager_test.go:640 +0x6f
2023-06-29T12:00:49.5762440Z   github.com/stretchr/testify/assert.Eventually.func1()
2023-06-29T12:00:49.5784167Z       /home/runner/go/pkg/mod/github.com/stretchr/testify@v1.8.2/assert/assertions.go:1737 +0x39
2023-06-29T12:00:49.5784559Z 
2023-06-29T12:00:49.5784750Z Goroutine 90074 (running) created at:
2023-06-29T12:00:49.5785359Z   github.com/tikv/pd/pkg/tso.(*KeyspaceGroupManager).updateKeyspaceGroup()
2023-06-29T12:00:49.5786096Z       /home/runner/work/pd/pd/pkg/tso/keyspace_group_manager.go:631 +0x718
2023-06-29T12:00:49.5786706Z   github.com/tikv/pd/pkg/tso.(*KeyspaceGroupManager).InitializeGroupWatchLoop.func1()
2023-06-29T12:00:49.5787412Z       /home/runner/work/pd/pd/pkg/tso/keyspace_group_manager.go:462 +0x116
2023-06-29T12:00:49.5788318Z   github.com/tikv/pd/pkg/utils/etcdutil.(*LoopWatcher).watch()
2023-06-29T12:00:49.5790143Z       /home/runner/work/pd/pd/pkg/utils/etcdutil/etcdutil.go:538 +0x1d32
2023-06-29T12:00:49.5790703Z   github.com/tikv/pd/pkg/utils/etcdutil.(*LoopWatcher).StartWatchLoop()
2023-06-29T12:00:49.5791353Z       /home/runner/work/pd/pd/pkg/utils/etcdutil/etcdutil.go:439 +0x484
2023-06-29T12:00:49.5791968Z   github.com/tikv/pd/pkg/tso.(*KeyspaceGroupManager).InitializeGroupWatchLoop.func5()
2023-06-29T12:00:49.5793268Z       /home/runner/work/pd/pd/pkg/tso/keyspace_group_manager.go:506 +0x39
2023-06-29T12:00:49.5795712Z 
2023-06-29T12:00:49.5795925Z Goroutine 92722 (finished) created at:
2023-06-29T12:00:49.5796364Z   github.com/stretchr/testify/assert.Eventually()
2023-06-29T12:00:49.5797098Z       /home/runner/go/pkg/mod/github.com/stretchr/testify@v1.8.2/assert/assertions.go:1737 +0x3a5
2023-06-29T12:00:49.5797616Z   github.com/stretchr/testify/require.Eventually()
2023-06-29T12:00:49.5798327Z       /home/runner/go/pkg/mod/github.com/stretchr/testify@v1.8.2/require/require.go:361 +0xb8
2023-06-29T12:00:49.5800973Z   github.com/stretchr/testify/require.(*Assertions).Eventually()
2023-06-29T12:00:49.5801788Z       /home/runner/go/pkg/mod/github.com/stretchr/testify@v1.8.2/require/require_forward.go:289 +0xc4
2023-06-29T12:00:49.5802325Z   github.com/tikv/pd/pkg/utils/testutil.Eventually()
2023-06-29T12:00:49.5803673Z       /home/runner/work/pd/pd/pkg/utils/testutil/testutil.go:63 +0x18e
2023-06-29T12:00:49.5806260Z   github.com/tikv/pd/tests/integrations/mcs/tso.(*tsoKeyspaceGroupManagerTestSuite).TestTSOKeyspaceGroupMerge()
2023-06-29T12:00:49.5807204Z       /home/runner/work/pd/pd/tests/integrations/mcs/tso/keyspace_group_manager_test.go:639 +0x174e
2023-06-29T12:00:49.5807639Z   runtime.call16()
2023-06-29T12:00:49.5808147Z       /opt/hostedtoolcache/go/1.20.1/x64/src/runtime/asm_amd64.s:728 +0x48
2023-06-29T12:00:49.5808538Z   reflect.Value.Call()
2023-06-29T12:00:49.5809102Z       /opt/hostedtoolcache/go/1.20.1/x64/src/reflect/value.go:370 +0xc7
2023-06-29T12:00:49.5809572Z   github.com/stretchr/testify/suite.Run.func1()
2023-06-29T12:00:49.5810246Z       /home/runner/go/pkg/mod/github.com/stretchr/testify@v1.8.2/suite/suite.go:197 +0x70d
2023-06-29T12:00:49.5810645Z   testing.tRunner()
2023-06-29T12:00:49.5811211Z       /opt/hostedtoolcache/go/1.20.1/x64/src/testing/testing.go:1576 +0x216
2023-06-29T12:00:49.5811608Z   testing.(*T).Run.func1()
2023-06-29T12:00:49.5812180Z       /opt/hostedtoolcache/go/1.20.1/x64/src/testing/testing.go:1629 +0x47
2023-06-29T12:00:49.5812526Z ==================

CI link

https://github.com/tikv/pd/actions/runs/5411854121/jobs/9835151920?pr=6720

Reason for failure (if possible)

Anything else

[lhy1024]

pd/pkg/tso/keyspace_group_manager.go

Line 1152 in b5c5c68

mergeTarget.MergeState = nil

I guess there maybe the same problem with checkTSOSplit