Flaky test cases in sentinel-parameter-flow-control module

[liqiangz]

Issue Description

Type: bug report

Describe what happened (or what feature you want)

Flaky unstable test in com.alibaba.csp.sentinel.slots.block.flow.param.ParamFlowDefaultCheckerTest

[ERROR] Tests run: 5, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 4.823 s <<< FAILURE! - in com.alibaba.csp.sentinel.slots.block.flow.param.ParamFlowDefaultCheckerTest
[ERROR] testParamFlowDefaultCheckSingleValueCheckQpsMultipleThreads(com.alibaba.csp.sentinel.slots.block.flow.param.ParamFlowDefaultCheckerTest)  Time elapsed: 4.063 s  <<< FAILURE!
java.lang.AssertionError: expected:<6> but was:<5>
	at com.alibaba.csp.sentinel.slots.block.flow.param.ParamFlowDefaultCheckerTest.testParamFlowDefaultCheckSingleValueCheckQpsMultipleThreads(ParamFlowDefaultCheckerTest.java:323)

[INFO] Running com.alibaba.csp.sentinel.slots.statistic.metric.HotParameterLeapArrayTest
[INFO] Tests run: 4, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.064 s - in com.alibaba.csp.sentinel.slots.statistic.metric.HotParameterLeapArrayTest
[INFO] Running com.alibaba.csp.sentinel.slots.statistic.data.ParamMapBucketTest
[INFO] Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.001 s - in com.alibaba.csp.sentinel.slots.statistic.data.ParamMapBucketTest
[INFO] 
[INFO] Results:
[INFO] 
[ERROR] Failures: 
[ERROR]   ParamFlowDefaultCheckerTest.testParamFlowDefaultCheckSingleValueCheckQpsMultipleThreads:323 expected:<6> but was:<5>
[INFO] 
[ERROR] Tests run: 32, Failures: 1, Errors: 0, Skipped: 0

Describe what you expected to happen

The test case should not fail.

How to reproduce it (as minimally and precisely as possible)

Tell us your environment

https://app.circleci.com/pipelines/github/alibaba/Sentinel/473/workflows/ce91869c-8bf7-457e-ba0e-7c0f43dc3c1e/jobs/2520

Anything else we need to know?

[sczyh30]

[INFO] Running com.alibaba.csp.sentinel.slots.block.flow.param.ParamFlowDefaultCheckerTest
testParamFlowDefaultCheckSingleValueCheckQpsMultipleThreads: sleep for 3 seconds
[ERROR] Tests run: 5, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 9.463 s <<< FAILURE! - in com.alibaba.csp.sentinel.slots.block.flow.param.ParamFlowDefaultCheckerTest
[ERROR] testParamFlowDefaultCheckSingleValueCheckQpsMultipleThreads(com.alibaba.csp.sentinel.slots.block.flow.param.ParamFlowDefaultCheckerTest)  Time elapsed: 4.538 s  <<< FAILURE!
java.lang.AssertionError: expected:<6> but was:<5>
	at com.alibaba.csp.sentinel.slots.block.flow.param.ParamFlowDefaultCheckerTest.testParamFlowDefaultCheckSingleValueCheckQpsMultipleThreads(ParamFlowDefaultCheckerTest.java:323)

[INFO] Running com.alibaba.csp.sentinel.slots.block.flow.param.ParamFlowRuleManagerTest
INFO: Sentinel log output type is: file
INFO: Sentinel log charset is: utf-8
INFO: Sentinel log base directory is: /home/circleci/logs/csp/
INFO: Sentinel log name use pid is: false
[INFO] Tests run: 4, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.185 s - in com.alibaba.csp.sentinel.slots.block.flow.param.ParamFlowRuleManagerTest
[INFO] Running com.alibaba.csp.sentinel.slots.block.flow.param.ParamFlowRuleUtilTest
[INFO] Tests run: 3, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.003 s - in com.alibaba.csp.sentinel.slots.block.flow.param.ParamFlowRuleUtilTest
[INFO] Running com.alibaba.csp.sentinel.slots.block.flow.param.ParamFlowSlotTest
[INFO] Tests run: 3, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 1.213 s - in com.alibaba.csp.sentinel.slots.block.flow.param.ParamFlowSlotTest
[INFO] Running com.alibaba.csp.sentinel.slots.block.flow.param.ParamFlowCheckerTest
[INFO] Tests run: 6, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 3.035 s - in com.alibaba.csp.sentinel.slots.block.flow.param.ParamFlowCheckerTest
[INFO] Running com.alibaba.csp.sentinel.slots.block.flow.param.ParamFlowThrottleRateLimitingCheckerTest
com.alibaba.csp.sentinel.slots.statistic.cache.ConcurrentLinkedHashMapWrapper@14a54ef6
testSingleValueThrottleCheckQps: sleep for 3 seconds
[ERROR] Tests run: 2, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 5.359 s <<< FAILURE! - in com.alibaba.csp.sentinel.slots.block.flow.param.ParamFlowThrottleRateLimitingCheckerTest
[ERROR] testSingleValueThrottleCheckQpsMultipleThreads(com.alibaba.csp.sentinel.slots.block.flow.param.ParamFlowThrottleRateLimitingCheckerTest)  Time elapsed: 0.368 s  <<< FAILURE!
java.lang.AssertionError: expected:<2> but was:<1>
	at com.alibaba.csp.sentinel.slots.block.flow.param.ParamFlowThrottleRateLimitingCheckerTest.testSingleValueThrottleCheckQpsMultipleThreads(ParamFlowThrottleRateLimitingCheckerTest.java:127)

[INFO] Running com.alibaba.csp.sentinel.slots.block.flow.param.ParameterMetricStorageTest
[INFO] Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.005 s - in com.alibaba.csp.sentinel.slots.block.flow.param.ParameterMetricStorageTest
[INFO] Running com.alibaba.csp.sentinel.slots.block.flow.param.ParameterMetricTest
[INFO] Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0 s - in com.alibaba.csp.sentinel.slots.block.flow.param.ParameterMetricTest
[INFO] 
[INFO] Results:
[INFO] 
[ERROR] Failures: 
[ERROR]   ParamFlowDefaultCheckerTest.testParamFlowDefaultCheckSingleValueCheckQpsMultipleThreads:323 expected:<6> but was:<5>
[ERROR]   ParamFlowThrottleRateLimitingCheckerTest.testSingleValueThrottleCheckQpsMultipleThreads:127 expected:<2> but was:<1>
[INFO] 
[ERROR] Tests run: 33, Failures: 2, Errors: 0, Skipped: 0