Release Dates

(all are in 2023)

  • KIP Freeze: 22nd November (Wednesday)
    • A KIP must be accepted by this date in order to be considered for this release. Note, any KIP that may not be implemented in a week, or that might destabilize the release, should be deferred.
  • Feature Freeze: 6th December (Wednesday)
    • major features merged & working on stabilisation, minor features have PR, release branch cut; anything not in this state will be automatically moved to the next release in JIRA
  • Code Freeze: 20th December (Wednesday)
  • At least two weeks of stabilization will follow Code Freeze, meaning we expect to release no earlier than January 3rd. We will move as fast as we can, and aim completion the earliest we can in January.


These dates are goals and subject to change, but we expect to stay on the Time Based Release Plan unless unexpected critical issues come up. While the earliest possible release date is 2w after code freeze, release candidates (RCs) will roll out as needed until the release vote passes.

The release manager is Stanislav Kozlovski 

How to Contribute

Before code freeze:

  • Participate in votes and discussions to land or postpone the open KIPs.
  • Review patches. We anticipate that this release, as it usually happens, will be bottlenecked mostly on reviews. The more reviewers, the more content we can fit in.
  • Write unit/integration/system tests. We want to preserve the tradition of high-quality releases in Apache Kafka. 

After code freeze:

  • Write more unit/integration/system tests. We want to preserve the tradition of high-quality releases in Apache Kafka.
  • Improve documentation.
  • Test the release candidates. 
  • Open blocker JIRAs on critical issues found. Open non-blocker JIRAs on any other issues found.
  • Fix critical bugs.
  • Review bug fixes.
  • Vote on release candidates. Even though only PMC votes are binding, community votes are super important as we evaluate the readiness of the release.

Open Issues

Key Summary T Created Updated Due Assignee Reporter P Status Resolution
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Also, feel free to refer to the 3.7.0 release page for more details of the included tickets (requires logging in to the Apache Kafka Jira project).

Planned KIP Content

Note: The planned content is not binding - the final content will be based on the features committed by the branch-cutting date.

See Kafka Improvement Proposals for the full list of KIPs.

If you do not see your KIP here and want to, please reply to the mailing list thread about the release!

KIPJIRAComponentStatus
KIP-405: Kafka Tiered Storage

KAFKA-7739 - Getting issue details... STATUS

KAFKA-15420 - Getting issue details... STATUS

core

A major part went out with 3.6.0.

A minor part of the KIP is to be completed in 3.7.0.

KIP-580: Exponential Backoff for Kafka Clients

KAFKA-9800 - Getting issue details... STATUS

clients

Done

KIP-714: Client metrics and observability

KAFKA-15601 - Getting issue details... STATUS

core

Done

A few minor improvements in the next release.

KIP-848: The Next Generation of the Consumer Rebalance Protocol

KAFKA-14048 - Getting issue details... STATUS

core

KIP Accepted

Targetting a Preview in 3.7

KIP-858: Handle JBOD broker disk failure in KRaft

KAFKA-14127 - Getting issue details... STATUS

core

KIP Accepted

Implementation not yet completed


KIP-890: Transactions Server-Side Defense

KAFKA-14402 - Getting issue details... STATUS

core

Part 1 Completed

KIP-896: Remove old client protocol API versions in Kafka 4.0 - metrics/request log changes to identify deprecated apis

KAFKA-15874 - Getting issue details... STATUS

core

KIP has enough votes Nov 22, 72 hours not completed

KIP-919: Allow AdminClient to Talk Directly with the KRaft Controller Quorum and add Controller Registration

KAFKA-15230 - Getting issue details... STATUS

core

KIP accepted

KIP-925: Rack aware task assignment in Kafka Streams

KAFKA-15022 - Getting issue details... STATUS

streams

KIP Accepted

KIP-951 - Leader discovery optimizations for the client

KAFKA-15868 - Getting issue details... STATUS

clients

Done

KIP-954: expand default DSL store configuration to custom types

KAFKA-15215 - Getting issue details... STATUS

streams

Done

KIP-959: Add BooleanConverter to Kafka Connect

KAFKA-15248 - Getting issue details... STATUS

connect

Done

KIP-960: Single-key single-timestamp IQv2 for state stores

KAFKA-15346 - Getting issue details... STATUS

streams

Done

KIP-962: Relax non-null key requirement in Kafka Streams

KAFKA-12317 - Getting issue details... STATUS

KAFKA-14748 - Getting issue details... STATUS

streams

Done

KIP-963: Additional metrics in Tiered Storage

KAFKA-15147 - Getting issue details... STATUS

core

KIP passed vote on November 21.

Targetting 3.7

KIP-968: Support single-key_multi-timestamp Interactive Queries (IQv2) for Versioned State Stores 

KAFKA-15347 - Getting issue details... STATUS

streams

Done

KIP-970: Deprecate and remove Connect's redundant task configurations endpoint

KAFKA-15387 - Getting issue details... STATUS

connect

Done (deprecation in 3.7.0, removal in 4.0.0)

KIP-975: Docker Image for Apache Kafka

KAFKA-15445 - Getting issue details... STATUS


Done

KIP-976: Cluster-wide dynamic log adjustment for Kafka Connect

KAFKA-15428 - Getting issue details... STATUS

connect

Done

KIP-978: Allow dynamic reloading of certificates with different DN / SANs

KAFKA-15464 - Getting issue details... STATUS

core

Done

KIP-979: Allow independently stop KRaft processes

KAFKA-15471 - Getting issue details... STATUS

core

Done

KIP-980: Allow creating connectors in a stopped state

KAFKA-15470 - Getting issue details... STATUS

connect

Done

KIP-985: Add reverseRange and reverseAll query over kv-store in IQv2

KAFKA-15527 - Getting issue details... STATUS

streams

Done

KIP-988: Streams Standby Update Listener

KAFKA-15448 - Getting issue details... STATUS

streams

Done

KIP-992: Proposal to introduce IQv2 Query Types: TimestampedKeyQuery and TimestampedRangeQuery

KAFKA-15629 - Getting issue details... STATUS

streams

Done

KIP-1000: List Client Metrics Configuration Resources

KAFKA-15831 - Getting issue details... STATUS

core

Done

KIP-1001: Add CurrentControllerId Metric

KAFKA-15980 - Getting issue details... STATUS

core

Done

Postponed to subsequent release

KIPJIRAComponentStatus
KIP-759: Unneeded repartition canceling


streamsKIP accepted
KIP-892: Transactional Semantics for StateStores


streamsKIP accepted
KIP-910: Update Source offsets for Source Connectors without producing records



Vote thread restarted on Nov 15 but no activity
KIP-912: Support decreasing send's block time without worrying about metadata's fetch



Vote thread started Nov 13 - no activity
KIP-913: add new method to provide possibility for accelerate first record's sending



Vote thread started Nov 13 - no activity
 KIP-953: partition method to be overloaded to accept headers as well



Vote didn't pass
KIP-956 Tiered Storage Quotas

KAFKA-15265 - Getting issue details... STATUS

coreDiscussion started Nov 22 (KIP Freeze Date)
KIP-967: Support custom SSL configuration for Kafka Connect RestServer



Vote didn't pass
KIP-969: Support range interactive queries (IQv2) for versioned state stores


streams
KIP-977: Partition-Level Throughput Metrics



2/3 binding votes on Nov 22 - didn't make the KIP Freeze
 KIP-982: Enhance Custom KafkaPrincipalBuilder to Access SslPrincipalMapper and KerberosShortNamer



Vote didn't pass. Just one binding vote
KIP-997: update WindowRangeQuery and unify WindowKeyQuery and WindowRangeQuery


streamsVote thread started November 17. Didn't get any votes by Nov 22
KIP-938: Add more metrics for measuring KRaft performance

KAFKA-15183 - Getting issue details... STATUS

KAFKA-15406 - Getting issue details... STATUS

core

Accepted. Majority was completed in 3.6. The remaining minority was planned to be done in 3.7.0, but it slipped (no PR opened)

KIP-998: Give ProducerConfig(props, doLog) constructor protected access

KAFKA-15781 - Getting issue details... STATUS

clients

KIP Accepted

No PR merged for 3.7. Slipped







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