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https://issues.apache.org/jira/browse/KAFKA-4728?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15851268#comment-15851268
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Ismael Juma commented on KAFKA-4728:
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Can you do a pull request as described here
https://cwiki.apache.org/confluence/display/KAFKA/Contributing+Code+Changes ?
Thanks!
> KafkaConsumer#commitSync should clone its input
> ------------------------------------------------
>
> Key: KAFKA-4728
> URL: https://issues.apache.org/jira/browse/KAFKA-4728
> Project: Kafka
> Issue Type: Bug
> Affects Versions: 0.10.1.1
> Reporter: Jan Lukavský
> Attachments: KAFKA-4728.patch
>
>
> The `commitSync` method should clone input map to prevent live-lock in
> situation when user code uses synchronization on the map. Cloning the map
> prevents the consumer of the response to the `commitSync` request to block
> (this might be different thread than the original issuer of the request).
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