data race found in TestRevisionNotFallBack

[glorv]

Which jobs are flaking?

leak-test

Which test(s) are flaking?

TestRevisionNotFallBack

Jenkins logs or GitHub Actions link

[2022-01-25T05:41:21.422Z] ==================

[2022-01-25T05:41:21.422Z] WARNING: DATA RACE

[2022-01-25T05:41:21.422Z] Read at 0x00c0009003c0 by goroutine 66:

[2022-01-25T05:41:21.422Z]   github.com/pingcap/tiflow/pkg/etcd.TestRevisionNotFallBack()

[2022-01-25T05:41:21.422Z]       /home/jenkins/agent/workspace/cdc_ghpr_leak_test/go/src/github.com/pingcap/tiflow/pkg/etcd/client_test.go:273 +0x6eb

[2022-01-25T05:41:21.422Z]   testing.tRunner()

[2022-01-25T05:41:21.422Z]       /usr/local/go/src/testing/testing.go:1193 +0x202

[2022-01-25T05:41:21.422Z] 

[2022-01-25T05:41:21.422Z] Previous write at 0x00c0009003c0 by goroutine 68:

[2022-01-25T05:41:21.422Z]   github.com/pingcap/tiflow/pkg/etcd.mockWatcher.Watch()

[2022-01-25T05:41:21.422Z]       /home/jenkins/agent/workspace/cdc_ghpr_leak_test/go/src/github.com/pingcap/tiflow/pkg/etcd/client_test.go:55 +0x72

[2022-01-25T05:41:21.422Z]   github.com/pingcap/tiflow/pkg/etcd.(*mockWatcher).Watch()

[2022-01-25T05:41:21.422Z]       <autogenerated>:1 +0x124

[2022-01-25T05:41:21.422Z]   github.com/pingcap/tiflow/pkg/etcd.(*Client).WatchWithChan()

[2022-01-25T05:41:21.422Z]       /home/jenkins/agent/workspace/cdc_ghpr_leak_test/go/src/github.com/pingcap/tiflow/pkg/etcd/client.go:246 +0x1339

[2022-01-25T05:41:21.422Z]   github.com/pingcap/tiflow/pkg/etcd.TestRevisionNotFallBack.func2()

[2022-01-25T05:41:21.422Z]       /home/jenkins/agent/workspace/cdc_ghpr_leak_test/go/src/github.com/pingcap/tiflow/pkg/etcd/client_test.go:266 

Details: https://ci2.pingcap.net/blue/organizations/jenkins/cdc_ghpr_leak_test/detail/cdc_ghpr_leak_test/19181/pipeline

Anything else we need to know

• Does this test exist for other branches as well?

• Has there been a high frequency of failure lately?

[overvenus]

Duplicate of #4549