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https://issues.apache.org/jira/browse/KAFKA-2744?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14990286#comment-14990286
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ASF GitHub Bot commented on KAFKA-2744:
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Github user asfgit closed the pull request at:
https://github.com/apache/kafka/pull/423
> WorkerSourceTask commits offsets too early when stopping
> --------------------------------------------------------
>
> Key: KAFKA-2744
> URL: https://issues.apache.org/jira/browse/KAFKA-2744
> Project: Kafka
> Issue Type: Bug
> Components: copycat
> Reporter: Ewen Cheslack-Postava
> Assignee: Ewen Cheslack-Postava
> Fix For: 0.9.0.0
>
>
> The call to commit offsets appears ok at first glance because we've invoked
> the SourceTask's stop method, but it runs before we've stopped the work
> thread which could still be invoking the SourceTask's poll() method and may
> have outstanding data. We need to wait until we're sure the work thread has
> completely finished so we're guaranteed to flush all the data generated by
> the SourceTask and commit the final offsets.
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