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https://issues.apache.org/jira/browse/FLINK-5128?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15714935#comment-15714935
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ASF GitHub Bot commented on FLINK-5128:
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Github user rmetzger commented on the issue:
https://github.com/apache/flink/pull/2893
+1
> Get Kafka partitions in FlinkKafkaProducer only if a partitioner is set
> -----------------------------------------------------------------------
>
> Key: FLINK-5128
> URL: https://issues.apache.org/jira/browse/FLINK-5128
> Project: Flink
> Issue Type: Improvement
> Components: Kafka Connector
> Reporter: Tzu-Li (Gordon) Tai
> Assignee: Renkai Ge
> Priority: Minor
>
> The fetched partitions list is only used when calling {{open(...)}} for a
> user supplied custom partitioner in {{FlinkKafkaProducer}}.
> Therefore, we can actually only fetch the partition list if the user used a
> partitioner (right now we always do the partition fetching).
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