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https://issues.apache.org/jira/browse/KAFKA-3837?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15339884#comment-15339884
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ASF GitHub Bot commented on KAFKA-3837:
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Github user bharatviswa504 closed the pull request at:
https://github.com/apache/kafka/pull/1505
> Report the name of the blocking thread when throwing
> ConcurrentModificationException
> ------------------------------------------------------------------------------------
>
> Key: KAFKA-3837
> URL: https://issues.apache.org/jira/browse/KAFKA-3837
> Project: Kafka
> Issue Type: Improvement
> Components: clients
> Affects Versions: 0.9.0.1
> Reporter: Simon Cooper
> Assignee: Bharat Viswanadham
> Priority: Minor
>
> {{KafkaConsumer.acquire}} throws {{ConcurrentModificationException}} if the
> current thread it does not match the {{currentThread}} field. It would be
> useful if the name of the other thread was included in the exception message
> to help debug the problem when this exception occurs.
> As it stands, it can be really difficult to work out what's going wrong when
> there's several threads all accessing the consumer at the same time, and your
> existing exclusive access logic doesn't seem to be working as it should.
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