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https://issues.apache.org/jira/browse/KAFKA-21155?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chia-Ping Tsai resolved KAFKA-21155.
------------------------------------
    Fix Version/s: 4.5.0
       Resolution: Fixed

> Document that the records map passed to ConsumerRecords must not contain 
> empty lists
> ------------------------------------------------------------------------------------
>
>                 Key: KAFKA-21155
>                 URL: https://issues.apache.org/jira/browse/KAFKA-21155
>             Project: Kafka
>          Issue Type: Improvement
>            Reporter: Chia-Ping Tsai
>            Assignee: Andy Huang
>            Priority: Minor
>             Fix For: 4.5.0
>
>
> {code:java}
>     public boolean isEmpty() {
>         return records.isEmpty();
>     }
>  {code}
> The empty list will make {{ConsumerRecords#isEmpty}} return false, and 
> {{partitions()}} will include a partition with no records. I have checked 
> that both classic and async consumers follow the rule. 
> [https://github.com/apache/kafka/pull/23532] will fix the issue in share 
> consumer.
> I was thinking of modifying {{{}isEmpty{}}}, but it may introduce an 
> unexpected breaking change, and the constructor is public so interceptors can 
> build {{ConsumerRecords}} too. That is to say ... let's update the docs 
> instead 🙂



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