Diggory James Joshua Blake created KAFKA-9529:
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Summary: Request Header v0 inconsistent between documentation and
implementation
Key: KAFKA-9529
URL: https://issues.apache.org/jira/browse/KAFKA-9529
Project: Kafka
Issue Type: Bug
Components: documentation
Reporter: Diggory James Joshua Blake
The [protocol
documentation|https://kafka.apache.org/protocol#protocol_messages] specifies
Request Header v0 like this:
{code:java}
Request Header v0 => request_api_key request_api_version correlation_id
request_api_key => INT16
request_api_version => INT16
correlation_id => INT32
{code}
With the `client_id` field only being added in Request Header v1.
However, Kafka will error on any request without the `client_id` even if the
client sets the API version to zero. Also, the JSON files specify that
`client_id` has been present since version zero:
[https://github.com/apache/kafka/blob/e24d0e22abb0fb3e4cb3974284a3dad126544584/clients/src/main/resources/common/message/RequestHeader.json#L27]
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