[jira] [Updated] (KAFKA-19650) Add message key to org.apache.kafka.clients.producer.RecordMetadata

["Andrew Schofield (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KAFKA-19650?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andrew Schofield updated KAFKA-19650:
-------------------------------------
    Labels: needs-kip  (was: )

> Add message key to org.apache.kafka.clients.producer.RecordMetadata
> -------------------------------------------------------------------
>
>                 Key: KAFKA-19650
>                 URL: https://issues.apache.org/jira/browse/KAFKA-19650
>             Project: Kafka
>          Issue Type: Wish
>          Components: clients
>            Reporter: Schubert Fernandes
>            Priority: Minor
>              Labels: needs-kip
>
> Although the message key is not really {_}metadata{_}, it may be useful to include it in the _org.apache.kafka.clients.producer.RecordMetadata_ class so that metdata can be tied back to a specific message.
> When using a standard Kafka producer it is easy to tie back the metadata to a specific message by using the callback mechanism.
> However, when using Kafka streams, the only way to access the metadata and log the details is to register a stream-level _org.apache.kafka.clients.producer.ProducerInterceptor_ instance.
> This mechanism has a drawback in that it is impossible to tie the RecordMetadata instance back to a particular message. 
> Including the message key in the metadata would solve this problem.



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