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https://issues.apache.org/jira/browse/FLINK-24119?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17625521#comment-17625521
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Gabor Somogyi commented on FLINK-24119:
---------------------------------------
[~martijnvisser] I've seen this jira already and intentionally opened
FLINK-29783. I think the main issue is that Kafka server remains live for some
magical reason and topics getting stuck there. This is not necessarily coming
from Flink code, Kafka has it's own issues. This jira is open for 1+ year and
going to remain like this because one must invest several weeks to find out why
this magic happens. I know what I'm talking about because I'm the Spark side
Kafka connector owner.
All in all either somebody invest such amount of time or we try to add some
random to the topic names. In think hardcoding topic names are not a hard
requirement to test something but such way we can avoid annoying CI failures.
I'm doing some experiments here but at the moment japicmp is blowing up
everything: https://github.com/apache/flink/pull/21180
Later on I'm pretty sure I'm going to have time to invest the mentioned time
but right now I'm working on time pressured features.
FYI [~mbalassi]
> KafkaITCase.testTimestamps fails due to "Topic xxx already exist"
> -----------------------------------------------------------------
>
> Key: FLINK-24119
> URL: https://issues.apache.org/jira/browse/FLINK-24119
> Project: Flink
> Issue Type: Bug
> Components: Connectors / Kafka
> Affects Versions: 1.14.0, 1.15.0, 1.16.0
> Reporter: Xintong Song
> Assignee: Qingsheng Ren
> Priority: Blocker
> Labels: auto-deprioritized-critical, test-stability
> Fix For: 1.16.1
>
>
> https://dev.azure.com/apache-flink/apache-flink/_build/results?buildId=23328&view=logs&j=c5f0071e-1851-543e-9a45-9ac140befc32&t=15a22db7-8faa-5b34-3920-d33c9f0ca23c&l=7419
> {code}
> Sep 01 15:53:20 [ERROR] Tests run: 23, Failures: 1, Errors: 0, Skipped: 0,
> Time elapsed: 162.65 s <<< FAILURE! - in
> org.apache.flink.streaming.connectors.kafka.KafkaITCase
> Sep 01 15:53:20 [ERROR] testTimestamps Time elapsed: 23.237 s <<< FAILURE!
> Sep 01 15:53:20 java.lang.AssertionError: Create test topic : tstopic failed,
> org.apache.kafka.common.errors.TopicExistsException: Topic 'tstopic' already
> exists.
> Sep 01 15:53:20 at org.junit.Assert.fail(Assert.java:89)
> Sep 01 15:53:20 at
> org.apache.flink.streaming.connectors.kafka.KafkaTestEnvironmentImpl.createTestTopic(KafkaTestEnvironmentImpl.java:226)
> Sep 01 15:53:20 at
> org.apache.flink.streaming.connectors.kafka.KafkaTestEnvironment.createTestTopic(KafkaTestEnvironment.java:112)
> Sep 01 15:53:20 at
> org.apache.flink.streaming.connectors.kafka.KafkaTestBase.createTestTopic(KafkaTestBase.java:212)
> Sep 01 15:53:20 at
> org.apache.flink.streaming.connectors.kafka.KafkaITCase.testTimestamps(KafkaITCase.java:191)
> Sep 01 15:53:20 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native
> Method)
> Sep 01 15:53:20 at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> Sep 01 15:53:20 at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> Sep 01 15:53:20 at java.lang.reflect.Method.invoke(Method.java:498)
> Sep 01 15:53:20 at
> org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
> Sep 01 15:53:20 at
> org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
> Sep 01 15:53:20 at
> org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
> Sep 01 15:53:20 at
> org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
> Sep 01 15:53:20 at
> org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:299)
> Sep 01 15:53:20 at
> org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:293)
> Sep 01 15:53:20 at
> java.util.concurrent.FutureTask.run(FutureTask.java:266)
> Sep 01 15:53:20 at java.lang.Thread.run(Thread.java:748)
> {code}
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