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https://issues.apache.org/jira/browse/KAFKA-6705?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16412512#comment-16412512
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Manikumar commented on KAFKA-6705:
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Existing JIRA: KAFKA-3539
> producer.send() should not block due to metadata not available
> --------------------------------------------------------------
>
> Key: KAFKA-6705
> URL: https://issues.apache.org/jira/browse/KAFKA-6705
> Project: Kafka
> Issue Type: Improvement
> Reporter: Dong Lin
> Assignee: Dong Lin
> Priority: Major
>
> Currently producer.send() may block on metadata for up to max.block.ms. This
> behavior is well documented but it is a bit sub-optimal. Since we return a
> future we should be able to make producer.send() completely non-blocking. One
> idea is to simply insert the record into a global queue shared across all
> partitions, and let the sender thread fetch record from this queue and send
> to broker.
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