[ 
https://issues.apache.org/jira/browse/KAFKA-8910?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Sergey Ushakov updated KAFKA-8910:
----------------------------------
    Description: 
h1. Problem

Javadoc for org.apache.kafka.clients.producer.Callback states:
{noformat}
* @param metadata The metadata for the record that was sent (i.e. the partition 
and offset). Null if an error
*        occurred. {noformat}
In fact, metadata is never null since KAFKA-6180. See 
org.apache.kafka.clients.producer.KafkaProducer.InterceptorCallback#onCompletion
 for details.

  was:
h1. Problem

Javadoc for 
org.apache.kafka.clients.producer.KafkaProducer.InterceptorCallback#onCompletion
 states:
{noformat}
* @param metadata The metadata for the record that was sent (i.e. the partition 
and offset). Null if an error
*        occurred. {noformat}
In fact, metadata is never null since KAFKA-6180. See 
org.apache.kafka.clients.producer.Callback for details.


> Incorrect javadoc at KafkaProducer.InterceptorCallback#onCompletion
> -------------------------------------------------------------------
>
>                 Key: KAFKA-8910
>                 URL: https://issues.apache.org/jira/browse/KAFKA-8910
>             Project: Kafka
>          Issue Type: Bug
>            Reporter: Sergey Ushakov
>            Assignee: Lee Dongjin
>            Priority: Major
>
> h1. Problem
> Javadoc for org.apache.kafka.clients.producer.Callback states:
> {noformat}
> * @param metadata The metadata for the record that was sent (i.e. the 
> partition and offset). Null if an error
> *        occurred. {noformat}
> In fact, metadata is never null since KAFKA-6180. See 
> org.apache.kafka.clients.producer.KafkaProducer.InterceptorCallback#onCompletion
>  for details.



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