[KAFKA-8861] Fix flaky RegexSourceIntegrationTest.testMultipleConsumersCanReadFromPartitionedTopic

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.0.1, 2.1.1, 2.3.0, 2.2.1, 2.4.0
• Fix Version/s: 2.0.2, 2.1.2, 2.2.2, 2.4.0, 2.3.1
• Component/s: streams, unit tests
• Labels: flaky-test
• Assignee: Chia-Ping Tsai
• Reporter: Chia-Ping Tsai
• Created: 03/Sep/19 10:22
• Updated: 12/Sep/19 16:59
• Resolved: 04/Sep/19 15:38

Description

This is similar to KAFKA-8011 and KAFKA-8026. The error stack is shown below.

java.util.ConcurrentModificationException
        at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:909)
        at java.util.ArrayList$Itr.next(ArrayList.java:859)
        at java.util.AbstractList.equals(AbstractList.java:521)
        at org.apache.kafka.streams.integration.RegexSourceIntegrationTest.lambda$testMultipleConsumersCanReadFromPartitionedTopic$5(RegexSourceIntegrationTest.java:351)
        at org.apache.kafka.test.TestUtils.waitForCondition(TestUtils.java:366)
        at org.apache.kafka.test.TestUtils.waitForCondition(TestUtils.java:336)
        at org.apache.kafka.streams.integration.RegexSourceIntegrationTest.testMultipleConsumersCanReadFromPartitionedTopic(RegexSourceIntegrationTest.java:351)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
        at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
        at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
        at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
        at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
        at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
        at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:305)
        at org.junit.runners.BlockJUnit4ClassRunner$1.evaluate(BlockJUnit4ClassRunner.java:100)
        at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:365)
        at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:103)
        at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:63)
        at org.junit.runners.ParentRunner$4.run(ParentRunner.java:330)
        at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:78)
        at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:328)

Issue Links

• is related to: KAFKA-8026 Flaky Test RegexSourceIntegrationTest#testRegexMatchesTopicsAWhenDeleted
• links to: GitHub Pull Request #7281