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https://issues.apache.org/jira/browse/KAFKA-19696?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18020549#comment-18020549
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LiuJing commented on KAFKA-19696:
---------------------------------

Hi, 

I'm currently reviewing the code related to 
`org.apache.kafka.clients.consumer.KafkaConsumer#resume`.  
Could you please let me know which Kafka versions are affected by this issue?  

Thanks!

> Re-enable SmokeTestDriverIntegrationTest for processing threads
> ---------------------------------------------------------------
>
>                 Key: KAFKA-19696
>                 URL: https://issues.apache.org/jira/browse/KAFKA-19696
>             Project: Kafka
>          Issue Type: Task
>          Components: streams
>            Reporter: Lucas Brutschy
>            Priority: Major
>
> The test fails occasionally with a race condition like this:
> {code:java}
>  2_0 RUNNING StreamTask(active): 
> org.apache.kafka.streams.errors.StreamsException: 
> java.util.ConcurrentModificationExceptionorg.apache.kafka.streams.errors.StreamsException:
>  java.util.ConcurrentModificationException at 
> org.apache.kafka.streams.processor.internals.StreamThread.runLoop(StreamThread.java:977)
>  at 
> org.apache.kafka.streams.processor.internals.StreamThread.run(StreamThread.java:894)Caused
>  by: java.util.ConcurrentModificationException at 
> java.base/java.util.HashMap$HashIterator.nextNode(HashMap.java:1597) at 
> java.base/java.util.HashMap$KeyIterator.next(HashMap.java:1620) at 
> org.apache.kafka.clients.consumer.internals.ClassicKafkaConsumer.resume(ClassicKafkaConsumer.java:979)
>  at 
> org.apache.kafka.clients.consumer.KafkaConsumer.resume(KafkaConsumer.java:1509)
>  at 
> org.apache.kafka.streams.processor.internals.StreamTask.resumePollingForPartitionsWithAvailableSpace(StreamTask.java:623)
>  at 
> org.apache.kafka.streams.processor.internals.TaskManager.resumePollingForPartitionsWithAvailableSpace(TaskManager.java:1866)
>  at 
> org.apache.kafka.streams.processor.internals.StreamThread.runOnceWithProcessingThreads(StreamThread.java:1355)
>  at 
> org.apache.kafka.streams.processor.internals.StreamThread.runLoop(StreamThread.java:932)
>  {code}
> h4. *Since the feature is not actively developed by anybody, we disable this 
> test. This ticket is to re-enable the test when the race condition is fixed.*
>  



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