flaky case TestClearCache #51671
Description
Bug Report
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1. Minimal reproduce step (Required)
==================== Test output for //br/pkg/streamhelper:streamhelper_test (shard 9 of 22):
=== RUN TestClearCache
[2024/03/11 11:05:14.238 +00:00] [INFO] [advancer.go:336] ["meet task event"] [event=Add(whole)]
[2024/03/11 11:05:14.238 +00:00] [INFO] [db.go:208] ["inc log backup task"] [count=1]
[2024/03/11 11:05:14.238 +00:00] [INFO] [advancer.go:430] ["added event"] [task="name:\"whole\" "] [ranges="{[, inf)}"] [current-checkpoint=0]
[2024/03/11 11:05:14.240 +00:00] [INFO] [advancer.go:313] ["current last region"] [category="log backup advancer hint"] [min="([, inf), 0)"] [for-polling=1] [min-ts=1970-01-01T00:00:00Z] [region-hint="ID=5,Leader=3,ConfVer=0,Version=1,Peers=[],RealRange=[, 30303132)"]
[2024/03/11 11:05:14.241 +00:00] [INFO] [advancer.go:561] ["updated log backup GC safe point."] [checkpoint=18446744073709551615] [target=18446744073709551615]
advancer_test.go:290:
Error Trace: br/pkg/streamhelper/advancer_test.go:290
Error: An error is expected but got nil.
Test: TestClearCache
--- FAIL: TestClearCache (0.00s)
FAIL
coverage: 1.5% of statements
--
Coverage runner: Not collecting coverage for failed test.
The following commands failed with status 1
/home/jenkins/.tidb/tmp/63a9840cd0739f2c243bb46478607469/sandbox/linux-sandbox/6743/execroot/__main__/bazel-out/k8-fastbuild/bin/br/pkg/streamhelper/streamhelper_test_/streamhelper_test.runfiles/__main__/br/pkg/streamhelper/streamhelper_test_/streamhelper_test
================================================================================
==================== Test output for //br/pkg/streamhelper:streamhelper_test (shard 9 of 22):
=== RUN TestClearCache
[2024/03/11 11:05:17.097 +00:00] [INFO] [advancer.go:336] ["meet task event"] [event=Add(whole)]
[2024/03/11 11:05:17.097 +00:00] [INFO] [db.go:208] ["inc log backup task"] [count=1]
[2024/03/11 11:05:17.097 +00:00] [INFO] [advancer.go:430] ["added event"] [task="name:\"whole\" "] [ranges="{[, inf)}"] [current-checkpoint=0]
[2024/03/11 11:05:17.100 +00:00] [INFO] [advancer.go:313] ["current last region"] [category="log backup advancer hint"] [min="([, inf), 0)"] [for-polling=1] [min-ts=1970-01-01T00:00:00Z] [region-hint="ID=5,Leader=2,ConfVer=0,Version=1,Peers=[],RealRange=[, 30303132)"]
[2024/03/11 11:05:17.101 +00:00] [INFO] [advancer.go:561] ["updated log backup GC safe point."] [checkpoint=18446744073709551615] [target=18446744073709551615]
advancer_test.go:290:
Error Trace: br/pkg/streamhelper/advancer_test.go:290
Error: An error is expected but got nil.
Test: TestClearCache
--- FAIL: TestClearCache (0.00s)