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https://issues.apache.org/jira/browse/KAFKA-9301?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16999171#comment-16999171
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Tomoyuki Saito commented on KAFKA-9301:
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Duplicate of KAFKA-9312.
I'll close this issue.
> KafkaProducer#flush should block until all the sent records get completed
> -------------------------------------------------------------------------
>
> Key: KAFKA-9301
> URL: https://issues.apache.org/jira/browse/KAFKA-9301
> Project: Kafka
> Issue Type: Bug
> Components: producer
> Affects Versions: 0.11.0.0
> Reporter: Tomoyuki Saito
> Priority: Major
>
> h2. ProducerBatch split makes ProducerBatch.produceFuture completed
> KAFKA-3995 introduced ProducerBatch split and resend when
> RecordTooLargeException happens on broker side. When ProducerBatch split
> happens, ProducerBatch.produceFuture becomes completed, even though records
> in a batch will be resent to a broker.
> h2. KafkaProducer#flush implementation
> With the current implementation, KafkaProducer#flush blocks until accumulated
> ProducerBatches get completed. As described above, that does not ensure all
> the sent records get completed.
> This issue is also mentioned in: https://github.com/apache/kafka/pull/6469
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