Schubert Fernandes created KAFKA-19650:
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Summary: 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
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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