[ 
https://issues.apache.org/jira/browse/FLINK-16908?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17136431#comment-17136431
 ] 

Robert Metzger commented on FLINK-16908:
----------------------------------------

https://dev.azure.com/apache-flink/apache-flink/_build/results?buildId=3554&view=logs&j=c5f0071e-1851-543e-9a45-9ac140befc32&t=684b1416-4c17-504e-d5ab-97ee44e08a20
{code}
2020-06-16T05:14:44.5620455Z 05:14:44,561 [                main] ERROR 
org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducerITCase [] - 
2020-06-16T05:14:44.5621747Z 
--------------------------------------------------------------------------------
2020-06-16T05:14:44.5622484Z Test 
testScaleDownBeforeFirstCheckpoint(org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducerITCase)
 failed with:
2020-06-16T05:14:44.5623719Z java.lang.AssertionError: Detected producer leak. 
Thread name: kafka-producer-network-thread | 
producer-MockTask-000000000000002a000000000000002c-2
2020-06-16T05:14:44.5624390Z    at org.junit.Assert.fail(Assert.java:88)
2020-06-16T05:14:44.5625212Z    at 
org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducerITCase.checkProducerLeak(FlinkKafkaProducerITCase.java:675)
2020-06-16T05:14:44.5626117Z    at 
org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducerITCase.testScaleDownBeforeFirstCheckpoint(FlinkKafkaProducerITCase.java:370)
2020-06-16T05:14:44.5626859Z    at 
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
2020-06-16T05:14:44.5627410Z    at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
2020-06-16T05:14:44.5628088Z    at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
2020-06-16T05:14:44.5628695Z    at 
java.lang.reflect.Method.invoke(Method.java:498)
2020-06-16T05:14:44.5629281Z    at 
org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
2020-06-16T05:14:44.5629953Z    at 
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
2020-06-16T05:14:44.5630614Z    at 
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
2020-06-16T05:14:44.5631352Z    at 
org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
2020-06-16T05:14:44.5631984Z    at 
org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
2020-06-16T05:14:44.5632575Z    at 
org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:55)
2020-06-16T05:14:44.5632941Z    at 
org.junit.rules.RunRules.evaluate(RunRules.java:20)
2020-06-16T05:14:44.5633277Z    at 
org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
2020-06-16T05:14:44.5633681Z    at 
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
2020-06-16T05:14:44.5634120Z    at 
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
2020-06-16T05:14:44.5634657Z    at 
org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
2020-06-16T05:14:44.5635091Z    at 
org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
2020-06-16T05:14:44.5635473Z    at 
org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
2020-06-16T05:14:44.5635866Z    at 
org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
2020-06-16T05:14:44.5636241Z    at 
org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
2020-06-16T05:14:44.5636666Z    at 
org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
2020-06-16T05:14:44.5637099Z    at 
org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
2020-06-16T05:14:44.5637504Z    at 
org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:48)
2020-06-16T05:14:44.5638018Z    at 
org.junit.rules.RunRules.evaluate(RunRules.java:20)
2020-06-16T05:14:44.5638359Z    at 
org.junit.runners.ParentRunner.run(ParentRunner.java:363)
2020-06-16T05:14:44.5639032Z    at 
org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:365)
2020-06-16T05:14:44.5639488Z    at 
org.apache.maven.surefire.junit4.JUnit4Provider.executeWithRerun(JUnit4Provider.java:273)
2020-06-16T05:14:44.5639970Z    at 
org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:238)
2020-06-16T05:14:44.5640436Z    at 
org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:159)
2020-06-16T05:14:44.5641091Z    at 
org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:384)
2020-06-16T05:14:44.5641659Z    at 
org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:345)
2020-06-16T05:14:44.5642102Z    at 
org.apache.maven.surefire.booter.ForkedBooter.execute(ForkedBooter.java:126)
2020-06-16T05:14:44.5642531Z    at 
org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:418)
2020-06-16T05:14:44.5642775Z 
2020-06-16T05:14:44.5643037Z 
================================================================================
2020-06-16T05:14:44.5643981Z 05:14:44,561 [                main] INFO  
org.apache.flink.streaming.connectors.kafka.KafkaTestBase    [] - 
-------------------------------------------------------------------------
2020-06-16T05:14:44.5644958Z 05:14:44,561 [                main] INFO  
org.apache.flink.streaming.connectors.kafka.KafkaTestBase    [] -     Shut down 
KafkaTestBase 
2020-06-16T05:14:44.5645825Z 05:14:44,561 [                main] INFO  
org.apache.flink.streaming.connectors.kafka.KafkaTestBase    [] - 
-------------------------------------------------------------------------
2020-06-16T05:15:07.5979964Z 05:15:07,597 [                main] INFO  
org.apache.flink.streaming.connectors.kafka.KafkaTestBase    [] - 
-------------------------------------------------------------------------
2020-06-16T05:15:07.5981141Z 05:15:07,597 [                main] INFO  
org.apache.flink.streaming.connectors.kafka.KafkaTestBase    [] -     
KafkaTestBase finished
2020-06-16T05:15:07.5982051Z 05:15:07,597 [                main] INFO  
org.apache.flink.streaming.connectors.kafka.KafkaTestBase    [] - 
-------------------------------------------------------------------------
2020-06-16T05:15:07.6570482Z [ERROR] Tests run: 12, Failures: 7, Errors: 1, 
Skipped: 0, Time elapsed: 264.871 s <<< FAILURE! - in 
org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducerITCase
2020-06-16T05:15:07.6571531Z [ERROR] 
testFailAndRecoverSameCheckpointTwice(org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducerITCase)
  Time elapsed: 62.869 s  <<< ERROR!
2020-06-16T05:15:07.6572166Z org.apache.kafka.common.errors.TimeoutException: 
Timeout expired after 60000milliseconds while awaiting InitProducerId
2020-06-16T05:15:07.6572559Z 
2020-06-16T05:15:07.6572979Z [ERROR] 
testRestoreToCheckpointAfterExceedingProducersPool(org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducerITCase)
  Time elapsed: 4.426 s  <<< FAILURE!
2020-06-16T05:15:07.6573960Z java.lang.AssertionError: Detected producer leak. 
Thread name: kafka-producer-network-thread | 
producer-MockTask-000000000000002a000000000000002c-2
2020-06-16T05:15:07.6574765Z    at org.junit.Assert.fail(Assert.java:88)
2020-06-16T05:15:07.6575328Z    at 
org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducerITCase.checkProducerLeak(FlinkKafkaProducerITCase.java:675)
2020-06-16T05:15:07.6576137Z    at 
org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducerITCase.testRestoreToCheckpointAfterExceedingProducersPool(FlinkKafkaProducerITCase.java:163)
2020-06-16T05:15:07.6576662Z    at 
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
2020-06-16T05:15:07.6577053Z    at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
2020-06-16T05:15:07.6577531Z    at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
2020-06-16T05:15:07.6577919Z    at 
java.lang.reflect.Method.invoke(Method.java:498)
2020-06-16T05:15:07.6578321Z    at 
org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
2020-06-16T05:15:07.6579030Z    at 
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
2020-06-16T05:15:07.6579528Z    at 
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
2020-06-16T05:15:07.6579989Z    at 
org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
2020-06-16T05:15:07.6580464Z    at 
org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
2020-06-16T05:15:07.6581147Z    at 
org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:55)
2020-06-16T05:15:07.6581510Z    at 
org.junit.rules.RunRules.evaluate(RunRules.java:20)
2020-06-16T05:15:07.6581859Z    at 
org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
2020-06-16T05:15:07.6582275Z    at 
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
2020-06-16T05:15:07.6582797Z    at 
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
2020-06-16T05:15:07.6583214Z    at 
org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
2020-06-16T05:15:07.6583575Z    at 
org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
2020-06-16T05:15:07.6583969Z    at 
org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
2020-06-16T05:15:07.6584359Z    at 
org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
2020-06-16T05:15:07.6584934Z    at 
org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
2020-06-16T05:15:07.6585355Z    at 
org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
2020-06-16T05:15:07.6585779Z    at 
org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
2020-06-16T05:15:07.6586202Z    at 
org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:48)
2020-06-16T05:15:07.6586560Z    at 
org.junit.rules.RunRules.evaluate(RunRules.java:20)
2020-06-16T05:15:07.6586924Z    at 
org.junit.runners.ParentRunner.run(ParentRunner.java:363)
2020-06-16T05:15:07.6587337Z    at 
org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:365)
2020-06-16T05:15:07.6587793Z    at 
org.apache.maven.surefire.junit4.JUnit4Provider.executeWithRerun(JUnit4Provider.java:273)
2020-06-16T05:15:07.6588283Z    at 
org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:238)
2020-06-16T05:15:07.6588726Z    at 
org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:159)
2020-06-16T05:15:07.6589224Z    at 
org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:384)
2020-06-16T05:15:07.6589736Z    at 
org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:345)
2020-06-16T05:15:07.6590172Z    at 
org.apache.maven.surefire.booter.ForkedBooter.execute(ForkedBooter.java:126)
2020-06-16T05:15:07.6590625Z    at 
org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:418)
2020-06-16T05:15:07.6590942Z 
2020-06-16T05:15:07.6591367Z [ERROR] 
testMigrateFromAtExactlyOnceToAtLeastOnce(org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducerITCase)
  Time elapsed: 2.08 s  <<< FAILURE!
2020-06-16T05:15:07.6592476Z java.lang.AssertionError: Detected producer leak. 
Thread name: kafka-producer-network-thread | 
producer-MockTask-000000000000002a000000000000002c-2
2020-06-16T05:15:07.6592939Z    at org.junit.Assert.fail(Assert.java:88)
2020-06-16T05:15:07.6593370Z    at 
org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducerITCase.checkProducerLeak(FlinkKafkaProducerITCase.java:675)
2020-06-16T05:15:07.6593998Z    at 
org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducerITCase.testRecoverWithChangeSemantics(FlinkKafkaProducerITCase.java:581)
2020-06-16T05:15:07.6594850Z    at 
org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducerITCase.testMigrateFromAtExactlyOnceToAtLeastOnce(FlinkKafkaProducerITCase.java:550)
2020-06-16T05:15:07.6595561Z    at 
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
2020-06-16T05:15:07.6595995Z    at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
2020-06-16T05:15:07.6596671Z    at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
2020-06-16T05:15:07.6597131Z    at 
java.lang.reflect.Method.invoke(Method.java:498)
2020-06-16T05:15:07.6597658Z    at 
org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
2020-06-16T05:15:07.6598118Z    at 
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
2020-06-16T05:15:07.6598559Z    at 
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
2020-06-16T05:15:07.6599106Z    at 
org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
2020-06-16T05:15:07.6599558Z    at 
org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
2020-06-16T05:15:07.6599948Z    at 
org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:55)
2020-06-16T05:15:07.6600306Z    at 
org.junit.rules.RunRules.evaluate(RunRules.java:20)
2020-06-16T05:15:07.6600650Z    at 
org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
2020-06-16T05:15:07.6601169Z    at 
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
2020-06-16T05:15:07.6601602Z    at 
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
2020-06-16T05:15:07.6602015Z    at 
org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
2020-06-16T05:15:07.6602467Z    at 
org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
2020-06-16T05:15:07.6602842Z    at 
org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
2020-06-16T05:15:07.6603237Z    at 
org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
2020-06-16T05:15:07.6603606Z    at 
org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
2020-06-16T05:15:07.6604023Z    at 
org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
2020-06-16T05:15:07.6604436Z    at 
org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
2020-06-16T05:15:07.6605002Z    at 
org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:48)
2020-06-16T05:15:07.6605393Z    at 
org.junit.rules.RunRules.evaluate(RunRules.java:20)
2020-06-16T05:15:07.6605732Z    at 
org.junit.runners.ParentRunner.run(ParentRunner.java:363)
2020-06-16T05:15:07.6606142Z    at 
org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:365)
2020-06-16T05:15:07.6606597Z    at 
org.apache.maven.surefire.junit4.JUnit4Provider.executeWithRerun(JUnit4Provider.java:273)
2020-06-16T05:15:07.6607082Z    at 
org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:238)
2020-06-16T05:15:07.6607552Z    at 
org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:159)
2020-06-16T05:15:07.6608021Z    at 
org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:384)
2020-06-16T05:15:07.6608524Z    at 
org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:345)
2020-06-16T05:15:07.6608965Z    at 
org.apache.maven.surefire.booter.ForkedBooter.execute(ForkedBooter.java:126)
2020-06-16T05:15:07.6609407Z    at 
org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:418)
2020-06-16T05:15:07.6609648Z 
2020-06-16T05:15:07.6610072Z [ERROR] 
testMigrateFromAtLeastOnceToExactlyOnce(org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducerITCase)
  Time elapsed: 1.773 s  <<< FAILURE!
2020-06-16T05:15:07.6611106Z java.lang.AssertionError: Detected producer leak. 
Thread name: kafka-producer-network-thread | 
producer-MockTask-000000000000002a000000000000002c-2
2020-06-16T05:15:07.6611569Z    at org.junit.Assert.fail(Assert.java:88)
2020-06-16T05:15:07.6612022Z    at 
org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducerITCase.checkProducerLeak(FlinkKafkaProducerITCase.java:675)
2020-06-16T05:15:07.6612696Z    at 
org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducerITCase.testRecoverWithChangeSemantics(FlinkKafkaProducerITCase.java:581)
2020-06-16T05:15:07.6613359Z    at 
org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducerITCase.testMigrateFromAtLeastOnceToExactlyOnce(FlinkKafkaProducerITCase.java:542)
2020-06-16T05:15:07.6613971Z    at 
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
2020-06-16T05:15:07.6614340Z    at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
2020-06-16T05:15:07.6614946Z    at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
2020-06-16T05:15:07.6615336Z    at 
java.lang.reflect.Method.invoke(Method.java:498)
2020-06-16T05:15:07.6615886Z    at 
org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
2020-06-16T05:15:07.6616331Z    at 
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
2020-06-16T05:15:07.6616786Z    at 
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
2020-06-16T05:15:07.6617246Z    at 
org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
2020-06-16T05:15:07.6617671Z    at 
org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
2020-06-16T05:15:07.6618085Z    at 
org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:55)
2020-06-16T05:15:07.6618429Z    at 
org.junit.rules.RunRules.evaluate(RunRules.java:20)
2020-06-16T05:15:07.6618791Z    at 
org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
2020-06-16T05:15:07.6619191Z    at 
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
2020-06-16T05:15:07.6619639Z    at 
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
2020-06-16T05:15:07.6620067Z    at 
org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
2020-06-16T05:15:07.6620430Z    at 
org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
2020-06-16T05:15:07.6620825Z    at 
org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
2020-06-16T05:15:07.6621258Z    at 
org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
2020-06-16T05:15:07.6621649Z    at 
org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
2020-06-16T05:15:07.6622066Z    at 
org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
2020-06-16T05:15:07.6622576Z    at 
org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
2020-06-16T05:15:07.6622995Z    at 
org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:48)
2020-06-16T05:15:07.6623354Z    at 
org.junit.rules.RunRules.evaluate(RunRules.java:20)
2020-06-16T05:15:07.6623715Z    at 
org.junit.runners.ParentRunner.run(ParentRunner.java:363)
2020-06-16T05:15:07.6624110Z    at 
org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:365)
2020-06-16T05:15:07.6624721Z    at 
org.apache.maven.surefire.junit4.JUnit4Provider.executeWithRerun(JUnit4Provider.java:273)
2020-06-16T05:15:07.6625243Z    at 
org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:238)
2020-06-16T05:15:07.6625690Z    at 
org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:159)
2020-06-16T05:15:07.6626187Z    at 
org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:384)
2020-06-16T05:15:07.6626671Z    at 
org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:345)
2020-06-16T05:15:07.6627127Z    at 
org.apache.maven.surefire.booter.ForkedBooter.execute(ForkedBooter.java:126)
2020-06-16T05:15:07.6627559Z    at 
org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:418)
2020-06-16T05:15:07.6627800Z 
2020-06-16T05:15:07.6628185Z [ERROR] 
testRecoverCommittedTransaction(org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducerITCase)
  Time elapsed: 3.307 s  <<< FAILURE!
2020-06-16T05:15:07.6629145Z java.lang.AssertionError: Detected producer leak. 
Thread name: kafka-producer-network-thread | 
producer-MockTask-000000000000002a000000000000002c-2
2020-06-16T05:15:07.6629600Z    at org.junit.Assert.fail(Assert.java:88)
2020-06-16T05:15:07.6630030Z    at 
org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducerITCase.checkProducerLeak(FlinkKafkaProducerITCase.java:675)
2020-06-16T05:15:07.6630755Z    at 
org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducerITCase.testRecoverCommittedTransaction(FlinkKafkaProducerITCase.java:513)
2020-06-16T05:15:07.6631324Z    at 
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
2020-06-16T05:15:07.6631696Z    at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
2020-06-16T05:15:07.6632158Z    at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
2020-06-16T05:15:07.6632699Z    at 
java.lang.reflect.Method.invoke(Method.java:498)
2020-06-16T05:15:07.6633101Z    at 
org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
2020-06-16T05:15:07.6633546Z    at 
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
2020-06-16T05:15:07.6634003Z    at 
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
2020-06-16T05:15:07.6634456Z    at 
org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
2020-06-16T05:15:07.6634970Z    at 
org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
2020-06-16T05:15:07.6635374Z    at 
org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:55)
2020-06-16T05:15:07.6635717Z    at 
org.junit.rules.RunRules.evaluate(RunRules.java:20)
2020-06-16T05:15:07.6636121Z    at 
org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
2020-06-16T05:15:07.6636742Z    at 
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
2020-06-16T05:15:07.6637438Z    at 
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
2020-06-16T05:15:07.6637900Z    at 
org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
2020-06-16T05:15:07.6638266Z    at 
org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
2020-06-16T05:15:07.6638657Z    at 
org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
2020-06-16T05:15:07.6639031Z    at 
org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
2020-06-16T05:15:07.6639430Z    at 
org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
2020-06-16T05:15:07.6639890Z    at 
org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
2020-06-16T05:15:07.6640368Z    at 
org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
2020-06-16T05:15:07.6640788Z    at 
org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:48)
2020-06-16T05:15:07.6641216Z    at 
org.junit.rules.RunRules.evaluate(RunRules.java:20)
2020-06-16T05:15:07.6641580Z    at 
org.junit.runners.ParentRunner.run(ParentRunner.java:363)
2020-06-16T05:15:07.6641973Z    at 
org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:365)
2020-06-16T05:15:07.6642516Z    at 
org.apache.maven.surefire.junit4.JUnit4Provider.executeWithRerun(JUnit4Provider.java:273)
2020-06-16T05:15:07.6643001Z    at 
org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:238)
2020-06-16T05:15:07.6643504Z    at 
org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:159)
2020-06-16T05:15:07.6644121Z    at 
org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:384)
2020-06-16T05:15:07.6644907Z    at 
org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:345)
2020-06-16T05:15:07.6645457Z    at 
org.apache.maven.surefire.booter.ForkedBooter.execute(ForkedBooter.java:126)
2020-06-16T05:15:07.6645889Z    at 
org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:418)
2020-06-16T05:15:07.6646138Z 
2020-06-16T05:15:07.6646508Z [ERROR] 
resourceCleanUpNone(org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducerITCase)
  Time elapsed: 0.455 s  <<< FAILURE!
2020-06-16T05:15:07.6647637Z java.lang.AssertionError: Detected producer leak. 
Thread name: kafka-producer-network-thread | 
producer-MockTask-000000000000002a000000000000002c-2
2020-06-16T05:15:07.6648099Z    at org.junit.Assert.fail(Assert.java:88)
2020-06-16T05:15:07.6648590Z    at 
org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducerITCase.checkProducerLeak(FlinkKafkaProducerITCase.java:675)
2020-06-16T05:15:07.6649333Z    at 
org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducerITCase.resourceCleanUp(FlinkKafkaProducerITCase.java:115)
2020-06-16T05:15:07.6649912Z    at 
org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducerITCase.resourceCleanUpNone(FlinkKafkaProducerITCase.java:82)
2020-06-16T05:15:07.6650375Z    at 
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
2020-06-16T05:15:07.6650828Z    at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
2020-06-16T05:15:07.6651337Z    at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
2020-06-16T05:15:07.6651738Z    at 
java.lang.reflect.Method.invoke(Method.java:498)
2020-06-16T05:15:07.6652122Z    at 
org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
2020-06-16T05:15:07.6652671Z    at 
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
2020-06-16T05:15:07.6653138Z    at 
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
2020-06-16T05:15:07.6653574Z    at 
org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
2020-06-16T05:15:07.6654020Z    at 
org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
2020-06-16T05:15:07.6654406Z    at 
org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:55)
2020-06-16T05:15:07.6654837Z    at 
org.junit.rules.RunRules.evaluate(RunRules.java:20)
2020-06-16T05:15:07.6655188Z    at 
org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
2020-06-16T05:15:07.6655604Z    at 
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
2020-06-16T05:15:07.6656053Z    at 
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
2020-06-16T05:15:07.6656445Z    at 
org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
2020-06-16T05:15:07.6656827Z    at 
org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
2020-06-16T05:15:07.6657204Z    at 
org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
2020-06-16T05:15:07.6657598Z    at 
org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
2020-06-16T05:15:07.6657983Z    at 
org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
2020-06-16T05:15:07.6658381Z    at 
org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
2020-06-16T05:15:07.6658812Z    at 
org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
2020-06-16T05:15:07.6659221Z    at 
org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:48)
2020-06-16T05:15:07.6659598Z    at 
org.junit.rules.RunRules.evaluate(RunRules.java:20)
2020-06-16T05:15:07.6659935Z    at 
org.junit.runners.ParentRunner.run(ParentRunner.java:363)
2020-06-16T05:15:07.6660341Z    at 
org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:365)
2020-06-16T05:15:07.6660809Z    at 
org.apache.maven.surefire.junit4.JUnit4Provider.executeWithRerun(JUnit4Provider.java:273)
2020-06-16T05:15:07.6661341Z    at 
org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:238)
2020-06-16T05:15:07.6661810Z    at 
org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:159)
2020-06-16T05:15:07.6662281Z    at 
org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:384)
2020-06-16T05:15:07.6662855Z    at 
org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:345)
2020-06-16T05:15:07.6663315Z    at 
org.apache.maven.surefire.booter.ForkedBooter.execute(ForkedBooter.java:126)
2020-06-16T05:15:07.6663731Z    at 
org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:418)
2020-06-16T05:15:07.6663969Z 
2020-06-16T05:15:07.6664370Z [ERROR] 
testRunOutOfProducersInThePool(org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducerITCase)
  Time elapsed: 1.946 s  <<< FAILURE!
2020-06-16T05:15:07.6665360Z java.lang.AssertionError: Detected producer leak. 
Thread name: kafka-producer-network-thread | 
producer-MockTask-000000000000002a000000000000002c-2
2020-06-16T05:15:07.6665895Z    at org.junit.Assert.fail(Assert.java:88)
2020-06-16T05:15:07.6666342Z    at 
org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducerITCase.checkProducerLeak(FlinkKafkaProducerITCase.java:675)
2020-06-16T05:15:07.6666946Z    at 
org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducerITCase.testRunOutOfProducersInThePool(FlinkKafkaProducerITCase.java:536)
2020-06-16T05:15:07.6667528Z    at 
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
2020-06-16T05:15:07.6667910Z    at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
2020-06-16T05:15:07.6668351Z    at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
2020-06-16T05:15:07.6668757Z    at 
java.lang.reflect.Method.invoke(Method.java:498)
2020-06-16T05:15:07.6669138Z    at 
org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
2020-06-16T05:15:07.6669605Z    at 
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
2020-06-16T05:15:07.6670070Z    at 
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
2020-06-16T05:15:07.6670504Z    at 
org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
2020-06-16T05:15:07.6671015Z    at 
org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
2020-06-16T05:15:07.6671406Z    at 
org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:55)
2020-06-16T05:15:07.6671769Z    at 
org.junit.rules.RunRules.evaluate(RunRules.java:20)
2020-06-16T05:15:07.6672116Z    at 
org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
2020-06-16T05:15:07.6672600Z    at 
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
2020-06-16T05:15:07.6673049Z    at 
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
2020-06-16T05:15:07.6673440Z    at 
org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
2020-06-16T05:15:07.6673824Z    at 
org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
2020-06-16T05:15:07.6674198Z    at 
org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
2020-06-16T05:15:07.6674663Z    at 
org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
2020-06-16T05:15:07.6675057Z    at 
org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
2020-06-16T05:15:07.6675455Z    at 
org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
2020-06-16T05:15:07.6675888Z    at 
org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
2020-06-16T05:15:07.6676289Z    at 
org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:48)
2020-06-16T05:15:07.6676665Z    at 
org.junit.rules.RunRules.evaluate(RunRules.java:20)
2020-06-16T05:15:07.6677006Z    at 
org.junit.runners.ParentRunner.run(ParentRunner.java:363)
2020-06-16T05:15:07.6677414Z    at 
org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:365)
2020-06-16T05:15:07.6677888Z    at 
org.apache.maven.surefire.junit4.JUnit4Provider.executeWithRerun(JUnit4Provider.java:273)
2020-06-16T05:15:07.6678353Z    at 
org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:238)
2020-06-16T05:15:07.6678825Z    at 
org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:159)
2020-06-16T05:15:07.6679293Z    at 
org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:384)
2020-06-16T05:15:07.6679806Z    at 
org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:345)
2020-06-16T05:15:07.6680257Z    at 
org.apache.maven.surefire.booter.ForkedBooter.execute(ForkedBooter.java:126)
2020-06-16T05:15:07.6680674Z    at 
org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:418)
2020-06-16T05:15:07.6680971Z 
2020-06-16T05:15:07.6681383Z [ERROR] 
testScaleDownBeforeFirstCheckpoint(org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducerITCase)
  Time elapsed: 7.701 s  <<< FAILURE!
2020-06-16T05:15:07.6682445Z java.lang.AssertionError: Detected producer leak. 
Thread name: kafka-producer-network-thread | 
producer-MockTask-000000000000002a000000000000002c-2
2020-06-16T05:15:07.6682868Z    at org.junit.Assert.fail(Assert.java:88)
2020-06-16T05:15:07.6683317Z    at 
org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducerITCase.checkProducerLeak(FlinkKafkaProducerITCase.java:675)
2020-06-16T05:15:07.6683928Z    at 
org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducerITCase.testScaleDownBeforeFirstCheckpoint(FlinkKafkaProducerITCase.java:370)
2020-06-16T05:15:07.6684603Z    at 
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
2020-06-16T05:15:07.6684985Z    at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
2020-06-16T05:15:07.6685424Z    at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
2020-06-16T05:15:07.6685829Z    at 
java.lang.reflect.Method.invoke(Method.java:498)
2020-06-16T05:15:07.6686216Z    at 
org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
2020-06-16T05:15:07.6686674Z    at 
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
2020-06-16T05:15:07.6687134Z    at 
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
2020-06-16T05:15:07.6687568Z    at 
org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
2020-06-16T05:15:07.6688016Z    at 
org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
2020-06-16T05:15:07.6688406Z    at 
org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:55)
2020-06-16T05:15:07.6688771Z    at 
org.junit.rules.RunRules.evaluate(RunRules.java:20)
2020-06-16T05:15:07.6689116Z    at 
org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
2020-06-16T05:15:07.6689531Z    at 
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
2020-06-16T05:15:07.6689981Z    at 
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
2020-06-16T05:15:07.6690379Z    at 
org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
2020-06-16T05:15:07.6690760Z    at 
org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
2020-06-16T05:15:07.6691214Z    at 
org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
2020-06-16T05:15:07.6691820Z    at 
org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
2020-06-16T05:15:07.6692278Z    at 
org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
2020-06-16T05:15:07.6692765Z    at 
org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
2020-06-16T05:15:07.6693196Z    at 
org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
2020-06-16T05:15:07.6693602Z    at 
org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:48)
2020-06-16T05:15:07.6693983Z    at 
org.junit.rules.RunRules.evaluate(RunRules.java:20)
2020-06-16T05:15:07.6694319Z    at 
org.junit.runners.ParentRunner.run(ParentRunner.java:363)
2020-06-16T05:15:07.6694803Z    at 
org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:365)
2020-06-16T05:15:07.6695272Z    at 
org.apache.maven.surefire.junit4.JUnit4Provider.executeWithRerun(JUnit4Provider.java:273)
2020-06-16T05:15:07.6695737Z    at 
org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:238)
2020-06-16T05:15:07.6696206Z    at 
org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:159)
2020-06-16T05:15:07.6696675Z    at 
org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:384)
2020-06-16T05:15:07.6697191Z    at 
org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:345)
2020-06-16T05:15:07.6697651Z    at 
org.apache.maven.surefire.booter.ForkedBooter.execute(ForkedBooter.java:126)
2020-06-16T05:15:07.6698063Z    at 
org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:418)
2020-06-16T05:15:07.6698301Z 
2020-06-16T05:15:08.2049387Z [INFO] 
2020-06-16T05:15:08.2049984Z [INFO] Results:
2020-06-16T05:15:08.2050195Z [INFO] 
2020-06-16T05:15:08.2050377Z [ERROR] Failures: 
2020-06-16T05:15:08.2051943Z [ERROR]   
FlinkKafkaProducerITCase.resourceCleanUpNone:82->resourceCleanUp:115->checkProducerLeak:675
 Detected producer leak. Thread name: kafka-producer-network-thread | 
producer-MockTask-000000000000002a000000000000002c-2
2020-06-16T05:15:08.2053472Z [ERROR]   
FlinkKafkaProducerITCase.testMigrateFromAtExactlyOnceToAtLeastOnce:550->testRecoverWithChangeSemantics:581->checkProducerLeak:675
 Detected producer leak. Thread name: kafka-producer-network-thread | 
producer-MockTask-000000000000002a000000000000002c-2
2020-06-16T05:15:08.2055333Z [ERROR]   
FlinkKafkaProducerITCase.testMigrateFromAtLeastOnceToExactlyOnce:542->testRecoverWithChangeSemantics:581->checkProducerLeak:675
 Detected producer leak. Thread name: kafka-producer-network-thread | 
producer-MockTask-000000000000002a000000000000002c-2
2020-06-16T05:15:08.2056797Z [ERROR]   
FlinkKafkaProducerITCase.testRecoverCommittedTransaction:513->checkProducerLeak:675
 Detected producer leak. Thread name: kafka-producer-network-thread | 
producer-MockTask-000000000000002a000000000000002c-2
2020-06-16T05:15:08.2058252Z [ERROR]   
FlinkKafkaProducerITCase.testRestoreToCheckpointAfterExceedingProducersPool:163->checkProducerLeak:675
 Detected producer leak. Thread name: kafka-producer-network-thread | 
producer-MockTask-000000000000002a000000000000002c-2
2020-06-16T05:15:08.2059647Z [ERROR]   
FlinkKafkaProducerITCase.testRunOutOfProducersInThePool:536->checkProducerLeak:675
 Detected producer leak. Thread name: kafka-producer-network-thread | 
producer-MockTask-000000000000002a000000000000002c-2
2020-06-16T05:15:08.2060965Z [ERROR]   
FlinkKafkaProducerITCase.testScaleDownBeforeFirstCheckpoint:370->checkProducerLeak:675
 Detected producer leak. Thread name: kafka-producer-network-thread | 
producer-MockTask-000000000000002a000000000000002c-2
2020-06-16T05:15:08.2061551Z [ERROR] Errors: 
2020-06-16T05:15:08.2062059Z [ERROR]   
FlinkKafkaProducerITCase.testFailAndRecoverSameCheckpointTwice » Timeout 
Timeo...
{code}


> FlinkKafkaProducerITCase testScaleUpAfterScalingDown Timeout expired while 
> initializing transactional state in 60000ms.
> -----------------------------------------------------------------------------------------------------------------------
>
>                 Key: FLINK-16908
>                 URL: https://issues.apache.org/jira/browse/FLINK-16908
>             Project: Flink
>          Issue Type: Bug
>          Components: Connectors / Kafka
>    Affects Versions: 1.11.0
>            Reporter: Piotr Nowojski
>            Priority: Major
>              Labels: test-stability
>
> https://dev.azure.com/rmetzger/Flink/_build/results?buildId=6889&view=logs&j=c5f0071e-1851-543e-9a45-9ac140befc32&t=f66652e3-384e-5b25-be29-abfea69ea8da
> {noformat}
> [ERROR] 
> testScaleUpAfterScalingDown(org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducerITCase)
>   Time elapsed: 64.353 s  <<< ERROR!
> org.apache.kafka.common.errors.TimeoutException: Timeout expired while 
> initializing transactional state in 60000ms.
> {noformat}
> After this initial error many other tests (I think all following unit tests) 
> failed with errors like:
> {noformat}
> [ERROR] 
> testFailAndRecoverSameCheckpointTwice(org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducerITCase)
>   Time elapsed: 7.895 s  <<< FAILURE!
> java.lang.AssertionError: Detected producer leak. Thread name: 
> kafka-producer-network-thread | producer-196
>       at 
> org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducerITCase.checkProducerLeak(FlinkKafkaProducerITCase.java:675)
>       at 
> org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducerITCase.testFailAndRecoverSameCheckpointTwice(FlinkKafkaProducerITCase.java:311)
> {noformat}



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