Unstable test testTopSQLReporter.TestCollectInternal

[zhouqiang-cl]

Bug Report

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[2021-07-18T12:10:23.616Z] FAIL: reporter_test.go:400: testTopSQLReporter.TestCollectInternal

[2021-07-18T12:10:23.616Z] 

[2021-07-18T12:10:23.616Z] reporter_test.go:432:

[2021-07-18T12:10:23.616Z]     c.Assert(exist, IsTrue)

[2021-07-18T12:10:23.616Z] ... obtained bool = false

[2021-07-18T12:10:23.616Z] 

[2021-07-18T12:10:23.617Z] [2021/07/18 20:08:34.168 +08:00] [WARN] [reporter.go:272] ["[top-sql] data points is invalid, it should never happen"] [self="{\"SQLDigest\":null,\"PlanDigest\":null,\"TimestampList\":null,\"CPUTimeMsList\":null,\"CPUTimeMsTotal\":0}"] [evict="{\"SQLDigest\":null,\"PlanDigest\":null,\"TimestampList\":[1],\"CPUTimeMsList\":[10,30],\"CPUTimeMsTotal\":0}"]

[2021-07-18T12:10:23.617Z] OOPS: 6 passed, 1 FAILED

[2021-07-18T12:10:23.617Z] --- FAIL: TestT (4.69s)

1. Minimal reproduce step (Required)

in ci https://ci.pingcap.net/blue/organizations/jenkins/tidb_ghpr_check_2/detail/tidb_ghpr_check_2/18263/pipeline

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[ti-srebot]

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[tisonkun]

@crazycs520 may you elaborate a bit the cause of this unstable tests? PR description is blank also.