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https://issues.apache.org/jira/browse/FLINK-25438?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17642548#comment-17642548
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Matthias Pohl commented on FLINK-25438:
---------------------------------------
Ok, I was too fast in judging without looking properly at the logs:
{code}
Dec 02 02:41:31 Caused by: java.util.concurrent.ExecutionException:
org.apache.kafka.common.errors.TopicExistsException: Topic
'kafka-single-topic-7718417820928969064' already exists.
Dec 02 02:41:31 at
java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:357)
Dec 02 02:41:31 at
java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1908)
Dec 02 02:41:31 at
org.apache.kafka.common.internals.KafkaFutureImpl.get(KafkaFutureImpl.java:165)
Dec 02 02:41:31 at
org.apache.flink.connector.kafka.sink.testutils.KafkaSinkExternalContext.createTopic(KafkaSinkExternalContext.java:101)
Dec 02 02:41:31 ... 111 more
Dec 02 02:41:31 Caused by: org.apache.kafka.common.errors.TopicExistsException:
Topic 'kafka-single-topic-7718417820928969064' already exists.
{code}
{{kafka-single-topic-7718417820928969064}} is, indeed, already randomized using
{{ThreadLocalRandom.current().nextLong(Long.MAX_VALUE)}} in
[KafkaSinkExternalContext:89|https://github.com/apache/flink/blob/9d87d33b9a66777e8ab36dc8a9f05e92fe55bc60/flink-connectors/flink-connector-kafka/src/test/java/org/apache/flink/connector/kafka/sink/testutils/KafkaSinkExternalContext.java#L89]
> KafkaProducerExactlyOnceITCase.testMultipleSinkOperators failed due to topic
> 'exactlyTopicCustomOperator20' already exists
> --------------------------------------------------------------------------------------------------------------------------
>
> Key: FLINK-25438
> URL: https://issues.apache.org/jira/browse/FLINK-25438
> Project: Flink
> Issue Type: Bug
> Components: Connectors / Kafka, Tests
> Affects Versions: 1.16.0, 1.17.0
> Reporter: Yun Tang
> Priority: Major
> Labels: test-stability
>
> Dec 23 13:48:21 [ERROR] Failures:
> Dec 23 13:48:21 [ERROR]
> KafkaProducerExactlyOnceITCase.testMultipleSinkOperators:36->KafkaProducerTestBase.testExactlyOnce:236->KafkaTestBase.createTestTopic:216
> Create test topic : exactlyTopicCustomOperator20 failed,
> org.apache.kafka.common.errors.TopicExistsException: Topic
> 'exactlyTopicCustomOperator20' already exists.
> instance:
> https://dev.azure.com/apache-flink/apache-flink/_build/results?buildId=28524&view=logs&j=c5f0071e-1851-543e-9a45-9ac140befc32&t=15a22db7-8faa-5b34-3920-d33c9f0ca23c
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