goleak in the statisticstest

[hawkingrei]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

goleak: Errors on successful test run: found unexpected goroutines:

[Goroutine 385 in state select, with go.etcd.io/etcd/client/v3.waitRetryBackoff on top of the stack:

goroutine 385 [select]:

go.etcd.io/etcd/client/v3.waitRetryBackoff({0x7d84298, 0xc003092bd0}, 0x2e, 0xc0007e84a0)

	external/io_etcd_go_etcd_client_v3/retry_interceptor.go:302 +0x146

go.etcd.io/etcd/client/v3.(*Client).unaryClientInterceptor.func1({0x7d84260, 0xc002297da0}, {0x65ee9b8, 0x14}, {0x6489be0, 0xc002297e00}, {0x6441520, 0xc003092b70}, 0xc000d54500, 0x670c798, ...)

	external/io_etcd_go_etcd_client_v3/retry_interceptor.go:50 +0x27f

google.golang.org/grpc.(*ClientConn).Invoke(0xc000d54500, {0x7d84260, 0xc002297da0}, {0x65ee9b8, 0x14}, {0x6489be0, 0xc002297e00}, {0x6441520, 0xc003092b70}, {0xa37be00, ...})

	external/org_golang_google_grpc/call.go:35 +0x26e

go.etcd.io/etcd/api/v3/etcdserverpb.(*kVClient).Put(0xc0007fa228, {0x7d84260, 0xc002297da0}, 0x0?, {0xa37be00, 0x3, 0x3})

	external/io_etcd_go_etcd_api_v3/etcdserverpb/rpc.pb.go:6469 +0xf5

go.etcd.io/etcd/client/v3.(*retryKVClient).Put(0xc0008a53e0, {0x7d84260, 0xc002297da0}, 0xc001c1c05a?, {0xa37be00, 0x3, 0x3})

	external/io_etcd_go_etcd_client_v3/retry.go:109 +0x96

go.etcd.io/etcd/client/v3.(*kv).Do(0xc000d88150, {_, _}, {0x2, {0xc00507cd68, 0x16, 0x18}, {0x0, 0x0, 0x0}, ...})

	external/io_etcd_go_etcd_client_v3/kv.go:156 +0x835

go.etcd.io/etcd/client/v3.(*kv).Put(0x0?, {0x7d84260, 0xc002297da0}, {0x65f6f47, 0x16}, {0xc001d17730, 0x70}, {0x0, 0x0, 0x0})

	external/io_etcd_go_etcd_client_v3/kv.go:114 +0x130

github.com/pingcap/tidb/telemetry.updateTelemetryStatus({{0xc00014ec20, 0x19}, 0x0, {0x0, 0x0}, 0x1}, 0xc000b86e00)

	telemetry/status.go:48 +0x1d3

github.com/pingcap/tidb/telemetry.ReportUsageData({0x7df15e8, 0xc00094a780}, 0xc000b86e00)

	telemetry/telemetry.go:167 +0x131

github.com/pingcap/tidb/telemetry.InitialRun({0x7df15e8, 0xc00094a780}, 0xc00176a6e8?)

	telemetry/telemetry.go:177 +0x352

github.com/pingcap/tidb/domain.(*Domain).TelemetryReportLoop(0xc0011f8000, {0x7df15e8, 0xc00094a780})

	domain/domain.go:1521 +0xc6

github.com/pingcap/tidb/session.BootstrapSession.func1()

	session/session.go:3022 +0x7b

created by github.com/pingcap/tidb/session.BootstrapSession

	session/session.go:3021 +0x915

2. What did you expect to see? (Required)

3. What did you see instead (Required)

4. What is your TiDB version? (Required)