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https://issues.apache.org/jira/browse/KAFKA-4728?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15854620#comment-15854620
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ASF GitHub Bot commented on KAFKA-4728:
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Github user asfgit closed the pull request at:
https://github.com/apache/kafka/pull/2491
> 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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