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https://issues.apache.org/jira/browse/KAFKA-3398?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xin Wang resolved KAFKA-3398.
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Resolution: Not A Problem
> avoid just sending to one partition when record key is empty string
> -------------------------------------------------------------------
>
> Key: KAFKA-3398
> URL: https://issues.apache.org/jira/browse/KAFKA-3398
> Project: Kafka
> Issue Type: Bug
> Components: clients
> Reporter: Xin Wang
>
> Now the DefaultPartitioner, if record key==null, choose a partition in a
> round-robin fashion; else choose a partition based on a hash of the key. But
> the producer will just send messages to one partition(partition index is 1)
> when key is an empty string "". We can add a check to avoid this.
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