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  • Release Plan 2.5.0 (Feb 2020)
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Release Dates

  • KIP Freeze: Jan 22, 2020 (a KIP must be accepted by this date in order to be considered for this release)
  • Feature Freeze: Jan 29, 2020 (major features merged & working on stabilization, minor features have PR, release branch cut; anything not in this state will be automatically moved to the next release in JIRA)
  • Code Freeze: Feb 12, 2020
  • Release: Feb 26, 2020  TBD


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 target release date is fixed at ~2w after code freeze, RCs will roll out as needed until the release vote passes.


The release manager is David Arthur.

Planned KIPs

KIPJIRAComponent

KIP-150 - Kafka-Streams Cogroup

KAFKA-6049 - Getting issue details... STATUS

Streams

KIP-352: Distinguish URPs caused by reassignment

KAFKA-8834 - Getting issue details... STATUS KAFKA-9059 - Getting issue details... STATUS KAFKA-8835 - Getting issue details... STATUS

Core

KIP-360: Improve reliability of idempotent/transactional producer

KAFKA-8710 - Getting issue details... STATUS

Core/Clients
KIP-396: Add Reset/List Offsets Operations to AdminClient

KAFKA-7689 - Getting issue details... STATUS

Clients
KIP-447: Producer scalability for exactly once semantics (partial)

KAFKA-8587 - Getting issue details... STATUS

Streams
KIP-455: Create an Administrative API for Replica Reassignment

KAFKA-8345 - Getting issue details... STATUS

Core
KIP-511: Collect and Expose Client's Name and Version in the Brokers (new metrics)

KAFKA-8855 - Getting issue details... STATUS

Core/Clients
KIP-515: Enable ZK client to use the new TLS supported authentication

KAFKA-8843 - Getting issue details... STATUS

Core
KIP-523: Add KStream#toTable to the Streams DSL

KAFKA-7658 - Getting issue details... STATUS

Streams
KIP-524: Allow users to choose config source when describing configs

KAFKA-9040 - Getting issue details... STATUS

Core
KIP-526: Reduce Producer Metadata Lookups for Large Number of Topics

KAFKA-8904 - Getting issue details... STATUS

Clients
KIP-527: Add VoidSerde to Serdes

KAFKA-8455 - Getting issue details... STATUS

Streams
KIP-530: Consider renaming 'UsePreviousTimeOnInvalidTimeStamp' class to 'UsePartitionTimeOnInvalidTimeStamp'

KAFKA-8953 - Getting issue details... STATUS

Streams
KIP-531: Drop support for Scala 2.11 in Kafka 2.5

KAFKA-9324 - Getting issue details... STATUS

Core
KIP-535: Allow state stores to serve stale reads during rebalance

KAFKA-6144 - Getting issue details... STATUS

Streams
KIP-537: Increase default zookeeper session timeout

KAFKA-9102 - Getting issue details... STATUS

Core
KIP-538: Add a metric tracking the number of open connections with a given SSL cipher type

KAFKA-9091 - Getting issue details... STATUS

Core
KIP-541: Create a fetch.max.bytes configuration for the broker

KAFKA-9101 - Getting issue details... STATUS

Core
KIP-543: Expand ConfigCommand's non-ZK functionality

KAFKA-9082 - Getting issue details... STATUS

Core
KIP-553: Disable all SSL protocols except TLSV1.2 by default.

KAFKA-9460 - Getting issue details... STATUS

Core
KIP-555: Deprecate Direct Zookeeper access in Kafka Administrative Tools (partial in 2.5)

KAFKA-9397 - Getting issue details... STATUS

Core
KIP-558: Track the set of actively used topics by connectors in Kafka Connect

KAFKA-9422 - Getting issue details... STATUS

Connect
KIP-559: Make the Kafka Protocol Friendlier with L7 Proxies

KAFKA-9437 - Getting issue details... STATUS

Core
KIP-562: Allow fetching a key from a single partition rather than iterating over all the stores on an instance

KAFKA-9445 - Getting issue details... STATUS

Streams


Postponed KIPs







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 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 testsWe 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 RCs. Even though only PMC votes are binding, community votes are super important as we evaluate the readiness of the release


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