[jira] [Created] (KAFKA-18659) librdkafka compressed produce fails unless api versions returns produce v0

["Ismael Juma (Jira)" <ji...@apache.org>]

Ismael Juma created KAFKA-18659:
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             Summary: librdkafka compressed produce fails unless api versions returns produce v0
                 Key: KAFKA-18659
                 URL: https://issues.apache.org/jira/browse/KAFKA-18659
             Project: Kafka
          Issue Type: Bug
            Reporter: Ismael Juma
            Assignee: Ismael Juma


A large percentage of non Java clients are unable to produce compressed records (with lz4, gzip, snappy) to Apache Kafka 4.0 due to a bug in how librdkafka evaluates whether compression is supported - if the api versions response does not include produce v0, compression with these formats is disallowed (zstd checks a newer version of produce).

To fix this, there are two options:
 # Update KIP-896 not to remove produce v0-v2 and KIP-724 not to remove support for producing messages with record format v0-v1.
 # Update api versions to return produce v0-v2 as supported, but reject requests with such versions with `UnsupportedVersion` error.

The second option seems better to me, even though it's not ideal.



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