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https://issues.apache.org/jira/browse/KAFKA-12872?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ismael Juma updated KAFKA-12872:
--------------------------------
Priority: Blocker (was: Major)
> KIP-724: Drop support for message formats v0 and v1
> ---------------------------------------------------
>
> Key: KAFKA-12872
> URL: https://issues.apache.org/jira/browse/KAFKA-12872
> Project: Kafka
> Issue Type: Improvement
> Reporter: Ismael Juma
> Assignee: Ismael Juma
> Priority: Blocker
> Labels: kip
> Fix For: 4.0.0
>
>
> Message format v2 was introduced in Apache Kafka 0.11.0 (released in June
> 2017) via
> [KIP-98|https://cwiki.apache.org/confluence/display/KAFKA/KIP-98+-+Exactly+Once+Delivery+and+Transactional+Messaging#KIP98ExactlyOnceDeliveryandTransactionalMessaging-MessageFormat]
> and has been the default since. It includes a number of enhancements
> (partition leader epoch, sequence ids, producer ids, record headers) required
> for correctness
> ([KIP-101|https://cwiki.apache.org/confluence/display/KAFKA/KIP-101+-+Alter+Replication+Protocol+to+use+Leader+Epoch+rather+than+High+Watermark+for+Truncation],
>
> [KIP-279|https://cwiki.apache.org/confluence/display/KAFKA/KIP-279%3A+Fix+log+divergence+between+leader+and+follower+after+fast+leader+fail+over],
>
> [KIP-320|https://cwiki.apache.org/confluence/display/KAFKA/KIP-320%3A+Allow+fetchers+to+detect+and+handle+log+truncation]),
> stronger semantics (idempotent producers, transactional clients) and other
> features ([KIP-82 - Add Record
> Headers|https://cwiki.apache.org/confluence/display/KAFKA/KIP-82+-+Add+Record+Headers],
> [KIP-392: Allow consumers to fetch from closest
> replica|https://cwiki.apache.org/confluence/display/KAFKA/KIP-392%3A+Allow+consumers+to+fetch+from+closest+replica]).
> Four years later, it's time to sunset message formats v0 and v1 to establish
> a new baseline in terms of supported client/broker behavior and to improve
> maintainability & supportability of Kafka. This also aligns with
> [KIP-679|https://cwiki.apache.org/confluence/display/KAFKA/KIP-679%3A+Producer+will+enable+the+strongest+delivery+guarantee+by+default],
> which will enable the idempotent producer by default in Apache Kafka 3.0
> (and requires message format v2). We propose the deprecation of message
> formats v0 and v1 in Apache Kafka 3.0 and their removal in Apache Kafka 4.0.
> KIP:
> [https://cwiki.apache.org/confluence/display/KAFKA/KIP-724%3A+Drop+support+for+message+formats+v0+and+v1]
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