Flaky-test: io.streamnative.pulsar.handlers.kop.KopEventManagerTest.testOneTopicGroupState

[Demogorgon314]

io.streamnative.pulsar.handlers.kop.KopEventManagerTest is flaky. The testOneTopicGroupState test method fails sporadically.

example failure

Error:  testOneTopicGroupState(io.streamnative.pulsar.handlers.kop.KopEventManagerTest)  Time elapsed: 2.117 s  <<< FAILURE!
java.lang.AssertionError: expected [1] but found [0]
	at org.testng.Assert.fail(Assert.java:96)
	at org.testng.Assert.failNotEquals(Assert.java:776)
	at org.testng.Assert.assertEqualsImpl(Assert.java:137)
	at org.testng.Assert.assertEquals(Assert.java:118)
	at org.testng.Assert.assertEquals(Assert.java:652)
	at org.testng.Assert.assertEquals(Assert.java:662)
	at io.streamnative.pulsar.handlers.kop.KopEventManagerTest.testOneTopicGroupState(KopEventManagerTest.java:95)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:568)
	at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:124)
	at org.testng.internal.InvokeMethodRunnable.runOne(InvokeMethodRunnable.java:54)
	at org.testng.internal.InvokeMethodRunnable.run(InvokeMethodRunnable.java:44)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1[136](https://github.com/streamnative/kop/actions/runs/3645980172/jobs/6156618062#step:13:137))
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
	at java.base/java.lang.Thread.run(Thread.java:833)

[Demogorgon314]

Another failure

Error:  Tests run: 2, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 29.932 s <<< FAILURE! - in io.streamnative.pulsar.handlers.kop.KopEventManagerTest
Error:  testOneTopicGroupState(io.streamnative.pulsar.handlers.kop.KopEventManagerTest)  Time elapsed: 2.001 s  <<< FAILURE!
java.lang.AssertionError: expected [1] but found [0]
	at org.testng.Assert.fail(Assert.java:96)
	at org.testng.Assert.failNotEquals(Assert.java:776)
	at org.testng.Assert.assertEqualsImpl(Assert.java:137)
	at org.testng.Assert.assertEquals(Assert.java:118)
	at org.testng.Assert.assertEquals(Assert.java:652)
	at org.testng.Assert.assertEquals(Assert.java:662)
	at io.streamnative.pulsar.handlers.kop.KopEventManagerTest.testOneTopicGroupState(KopEventManagerTest.java:95)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:568)
	at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:124)
	at org.testng.internal.InvokeMethodRunnable.runOne(InvokeMethodRunnable.java:54)
	at org.testng.internal.InvokeMethodRunnable.run(InvokeMethodRunnable.java:44)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
	at java.base/java.lang.Thread.run(Thread.java:833)