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https://issues.apache.org/jira/browse/KAFKA-3549?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15237795#comment-15237795
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Ismael Juma commented on KAFKA-3549:
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Interesting. It should have been obvious given that we were leaking producers
and zkclients until recently. ;)
> Close consumers instantiated in consumer tests
> ----------------------------------------------
>
> Key: KAFKA-3549
> URL: https://issues.apache.org/jira/browse/KAFKA-3549
> Project: Kafka
> Issue Type: Improvement
> Reporter: Grant Henke
> Assignee: Grant Henke
>
> Close consumers instantiated in consumer tests. Since these consumers often
> use the default group.id of "", they could cause transient failures like
> those seen in KAFKA-3117 and KAFKA-2933. I have not been able to prove that
> this change will fix those failures, but closing the consumers is a good
> practice regardless.
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