2.3.1

2.3.1 (Apr 9, 2026)

Fixes

• Fix TaggedFields value encoding; add test coverage (#2725)
• Fix zstd multi-frame decompression failure (#2717)
• Fix KeyError in KafkaConsumer.committed() (#2710)
• Fix VarInt/VarLong encoding; move tests to test/protocol/ (#2706)
• Fix Fetcher._fetch_offsets_by_times retry handling (#2833)
• Fixes to support integration testing with external KAFKA_URI (#2838)
• Minor py2 fixes: consumer integration test; dont pip install python-snappy

2.2.19

2.2.19 (Apr 9, 2026)

Fixes

• Fix TaggedFields value encoding; add test coverage (#2725)
• Fix zstd multi-frame decompression failure (#2717)
• Fix KeyError in KafkaConsumer.committed() (#2710)
• Fix VarInt/VarLong encoding; move tests to test/protocol/ (#2706)
• Fix Fetcher._fetch_offsets_by_times retry handling (#2833)
• Fixes to support integration testing with external KAFKA_URI (#2838)
• Minor py2 fixes: consumer integration test; done pip install python-snappy

2.3.0

2.3.0 (Nov 20, 2025)

2.3.x will be the last release branch with python2 support!

CLI

• python -m cli interfaces for kafka.admin, kafka.consumer, kafka.producer (#2650)

Producer

• KIP-654: Abort transaction with pending data with TransactionAbortedError (#2662)
• KafkaProducer: Handle UnknownProducerIdError (#2663)
• KIP-467: Augment ProduceResponse error messaging for specific culprit records (#2661)

Consumer

• KIP-345: Consumer group static membership (#2625)
• KIP-207: Add ListOffsetsRequest v5 / handle OffsetNotAvailableError (#2657)
• Fetcher: Add missing argument in debug log (#2665)

AdminClient

• KIP-430: Return Authorized Operations in Describe Responses (#2656)
• Add send_request() and send_requests() to KafkaAdminClient (#2649)

Maintenance

• Remove old/unused kafka.protocol.pickle (#2653)
• Switch protocol code to getattr/setattr from dict (#2654)
• Drop unused imports (#2651)

Project Infra

• Bump github/codeql-action from 3 to 4 (#2678)
• Bump actions/setup-python from 5 to 6 (#2674)
• Bump actions/setup-java from 4 to 5 (#2673)
• Bump actions/checkout from 4 to 5 (#2669)
• Bump actions/checkout from 5 to 6 (#2694)
• NixOS helpers

2.2.15

2.2.15 (July 1, 2025)

Fixes

• Fix KafkaProducer broken method names (@llk89 / #2660)
• Fix spelling mistake in KafkaConsumer docs (@Xeus-CC / #2659)

2.2.14

2.2.14 (June 27, 2025)

Fixes

• python2 fixups (#2655)
• Fix coordinator lock contention during close() (#2652)

2.2.13

2.2.13 (June 20, 2025)

Fixes

• Use client.await_ready() to simplify blocking wait and add timeout to admin client (#2648)
• Fixup import style in example.py

Documentation

• update README kafka version badge to include 4.0

2.2.12

2.2.12 (June 18, 2025)

Fixes

• Fix construction of final GSSAPI authentication message (#2647)
• Avoid RuntimeError on mutated _completed_fetches deque in consumer fetcher (#2646)
• Throw exception on invalid bucket type (#2642)

2.2.11

2.2.11 (June 5, 2025)

Fixes

• Do not ignore metadata response for single topic with error (#2640)
• Fix decoding bug in AWS_MSK_IAM mechanism (#2639)
• Add synchronized decorator; add lock to subscription state (#2636)
• Update build links in documentation (#2634)

2.2.10

2.2.10 (May 22, 2025)

Fixes

• Set the current host in the SASL configs (#2633)
• Fix sasl gssapi plugin: do not rely on client_ctx.complete in auth_bytes() (#2631)

2.2.9

2.2.9 (May 21, 2025)

Fixes

• Do not reset fetch positions if offset commit fetch times out (#2629)

Logging / Error Messages

• More / updated debug logging for coordinator / consumer (#2630)