Version 1.60.1 (2026-07-29)

What's Changed

🎉 New Features / Improvements

• feat(consumer): add rebalance protocol plumbing by @dnwe in #3670
• feat: add Kafka versions 4.1.2, 4.2.1 and 4.3.1 by @dnwe in #3675
• feat: raise default Kafka version to 2.8.0 by @dnwe in #3676
• feat(consumer): add cooperative sticky assignor by @dnwe in #3671
• feat: add TransactionClusterAdmin for KIP-664 detection APIs by @adrian-januzi in #3669
• feat(offset): commit revoked partitions on cooperative rebalance by @dnwe in #3688

🐛 Fixes

• fix(consumer): preserve pauses across reassignment by @dnwe in #3681
• fix(producer): wake stranded brokerProducer when partition unmutes by @dnwe in #3692

📦 Dependency updates

• fix(deps): update module github.com/klauspost/compress to v1.19.1 by @renovate[bot] in #3649
• chore(deps): update ossf/scorecard-action action to v2.4.4 by @renovate[bot] in #3683

🔧 Maintenance

• refactor(consumer): separate join and sync round by @dnwe in #3680

New Contributors

• @adrian-januzi made their first contribution in #3669

Full Changelog: v1.60.0...v1.60.1

Version 1.60.0 (2026-07-13)

What's Changed

🎉 New Features / Improvements

• feat: support Metadata V11 by @dnwe in #3636
• feat: support Produce V10 by @dnwe in #3637
• feat: support DescribeProducers v0 by @dnwe in #3659
• feat: support DescribeTransactions v0 by @dnwe in #3661
• feat: support int64 arrays in flexible protocol by @dnwe in #3662
• feat: support ListTransactions v0 and v1 by @dnwe in #3663
• feat: more flexible protocols for kafka28 parity by @dnwe in #3664
• feat: support KIP-516 topic ids by @dnwe in #3666

🐛 Fixes

• fix: correct fetch v12 tagged struct encoding by @dnwe in #3638
• fix: map new metadata request v8 to kafka 2.3.0 by @fereidani in #3642
• fix: handle zstd encoder and decoder construction errors by @fereidani in #3643
• fix: release retry mute on shutdown handoff by @dnwe in #3645
• fix: order non-idempotent connection retries by @dnwe in #3644

📦 Dependency updates

• chore(deps): bump the golang-x group across 1 directory with 3 updates by @dependabot[bot] in #3660
• chore(deps): update docker/setup-buildx-action action to v4.2.0 by @renovate[bot] in #3658
• chore(deps): update docker/bake-action action to v7.3.0 by @renovate[bot] in #3652
• chore(deps): bump github.com/klauspost/compress from 1.18.6 to 1.19.0 by @dependabot[bot] in #3651
• chore(deps): update golangci/golangci-lint-action action to v9.3.0 by @renovate[bot] in #3648

➕ Other Changes

• fix: correct typos in comments and godoc by @maxtaran2010 in #3656

New Contributors

• @fereidani made their first contribution in #3642
• @maxtaran2010 made their first contribution in #3656

Full Changelog: v1.50.3...v1.60.0

Version 1.50.3 (2026-06-15)

What's Changed

🎉 New Features / Improvements

• feat: support Fetch v12 by @dnwe in #3609
• feat: support CreateTopics v6 by @dnwe in #3622
• feat: support DeleteTopics v5 by @dnwe in #3624
• feat: support AddPartitionsToTxn v3 by @hindessm in #3625
• feat: support Produce v9 by @dnwe in #3629
• feat: support CreatePartitions v3 by @dnwe in #3631
• feat: expose broker features from ApiVersions v3 by @dnwe in #3633
• feat: support UpdateFeatures by @dnwe in #3632
• feat: add OnAssignmentBalanceStrategy, the onAssignment half of the assignor contract by @lizthegrey in #3627
• feat: support ApiVersions V4 and discover upgradable features in test by @dnwe in #3634

🐛 Fixes

• fix: avoid makeslice "len out of range" panics on invalid response by @hindessm in #3612
• fix: avoid makeslice panic in request decode too by @dnwe in #3613
• fix(test): wait for leaders after topic create by @dnwe in #3623
• fix(consumer): don't panic on requeue after unref by @dnwe in #3630

📦 Dependency updates

• chore(deps): update golang-x to v0.53.0 by @renovate[bot] in #3618
• fix(deps): update module golang.org/x/sys to v0.46.0 - autoclosed by @renovate[bot] in #3617
• fix(deps): update module golang.org/x/sync to v0.21.0 by @renovate[bot] in #3616
• fix(deps): update module golang.org/x/net to v0.56.0 by @renovate[bot] in #3626

🔧 Maintenance

• chore: update default Kafka version to 2.6 by @dnwe in #3608
• chore: more protocol version placeholders by @hindessm in #3610
• chore: extend fuzz testing to more types by @dnwe in #3614
• chore: clean up Int32 array encode/decode by @hindessm in #3619
• chore: apply Go's modernize fixes by @dnwe in #3621

Full Changelog: v1.50.2...v1.50.3

Version 1.50.2 (2026-06-05)

What's Changed

🎉 New Features / Improvements

• feat(consumer): add support for SyncGroupRequest/Response v5 (KIP-559) by @dnwe in #3591
• feat(txn): add protocol support for TxnOffsetCommit v3 by @dnwe in #3592
• feat(txn): support consumer group metadata in TxnOffsetCommit v3 by @dnwe in #3593
• feat(admin): add protocol support for DeleteRecords v2 (KIP-482) by @dnwe in #3594
• feat(protocol): add support for DescribeConfigs v3 and v4 by @dnwe in #3596
• feat(admin): add DescribeConfigs for multiple resources by @dnwe in #3600
• feat(consumer): option to cap decompressed batch size by @dnwe in #3604

🐛 Fixes

• fix(admin): retry ACL and SCRAM ops on stale controller by @dnwe in #3598

📦 Dependency updates

• fix(deps): update module github.com/pierrec/lz4/v4 to v4.1.27 by @renovate[bot] in #3597

Full Changelog: v1.50.1...v1.50.2

Version 1.50.1 (2026-05-27)

What's Changed

🐛 Fixes

• fix: correct requiredVersion for V8 JoinGroup and add protocol version placeholders by @dnwe in #3585

Full Changelog: v1.50.0...v1.50.1

Version 1.50.0 (2026-05-27)

What's Changed

🎉 New Features / Improvements

• feat: add Java-compatible murmur2 partitioner by @dnwe in #3567
• feat(protocol): support LeaveGroupRequest/Response v5 (KIP-800) by @dnwe in #3576
• feat(protocol): support JoinGroupRequest/Response v8 (KIP-800) by @dnwe in #3577
• feat(consumer_group): set cancellation cause on session context by @prakhar7651 in #3575
• feat(consumer_group): send KIP-800 reason on JoinGroup and LeaveGroup by @dnwe in #3584
• feat: add Kafka 4.3.0 version placeholder by @dnwe in #3587
• feat(admin): support OffsetFetchRequest v8 by @dnwe in #3565

🐛 Fixes

• fix(client): don't log ErrNoTopicsToUpdateMetadata every tick by @dnwe in #3566
• fix(broker): snapshot fetch meters before deferred Mark by @dnwe in #3563
• fix: prevent len out of range panic on 32bit architectures by @gibmat in #3579
• fix(offset): retry fetchInitialOffset on top-level coordinator errors by @dnwe in #3574

📦 Dependency updates

• chore(deps): update docker/bake-action action to v7.2.0 by @renovate[bot] in #3568
• fix(deps): update module golang.org/x/sys to v0.45.0 by @renovate[bot] in #3570
• chore(deps): update golangci/golangci-lint-action action to v9.2.1 by @renovate[bot] in #3571
• chore(deps): update module golang.org/x/crypto to v0.52.0 by @renovate[bot] in #3572
• fix(deps): update module golang.org/x/net to v0.55.0 by @renovate[bot] in #3573
• chore(deps): update docker/setup-buildx-action action to v4.1.0 by @renovate[bot] in #3578

🔧 Maintenance

• refactor: replace eapache/queue with generic ring buffer by @dnwe in #3560
• test(fvt): use a per-message timeout in follower failover test by @dnwe in #3562

New Contributors

• @gibmat made their first contribution in #3579
• @prakhar7651 made their first contribution in #3575

Full Changelog: v1.49.0...v1.50.0

Version 1.49.0 (2026-05-18)

What's Changed

🚨 Breaking Changes

• fix(consumer): decouple FetchRequest.MaxBytes from MaxResponseSize by @dnwe in #3538

🎉 New Features / Improvements

• feat(consumer): warn on sustained partition retries by @dnwe in #3535
• feat(producer): add Produce v8 request/response support by @dnwe in #3540
• feat(consumer): cap partition consumer retries by @dnwe in #3539
• feat: support FindCoordinator V3 protocol by @hindessm in #3544
• feat: support describe acls v2 by @hindessm in #3548
• feat: support create acls v2 by @hindessm in #3549
• feat: support delete acls v2 by @hindessm in #3550
• feat: support sasl authenticate v2 by @hindessm in #3551
• feat: support create partitions v2 by @hindessm in #3554
• feat: support join group v7 by @hindessm in #3555

🐛 Fixes

• fix: flexible decoder out-of-bounds panic by @hindessm in #3543
• fix(consumer): size partial-batch retry correctly by @dnwe in #3541
• feat(consumer): add OffsetCommit v8 request/response support by @dnwe in #3545
• fix: decode nullable ACL describe error messages by @dnwe in #3552
• fix(consumer): lease preferred read replicas by @dnwe in #3553
• fix(producer): honour Retry.Backoff in idempotent retryBatch by @dnwe in #3557

🔧 Maintenance

• chore: better bounds checking by @hindessm in #3546
• chore: bump deps in ./examples tree by @dnwe in #3558
• docs: add AlterPartitionReassignments example and functional test by @dnwe in #3556

Full Changelog: v1.48.2...v1.49.0

Version 1.48.2 (2026-05-13)

What's Changed

🎉 New Features / Improvements

• feat(admin): add KIP-396 list/alter offsets APIs by @DCjanus in #3419
• feat: add SubscriptionUserDataProvider hook for BalanceStrategy by @lizthegrey in #3506
• perf(zstd): scale idle zstd encoder cap to GOMAXPROCS by @lizthegrey in #3507

🐛 Fixes

• fix: retry ListTopics on transient transport errors by @huynhanx03 in #3497
• test(fvt): only safeClose if we created by @dnwe in #3530
• fix(client): scope metadata refresh errors to requested topics by @dnwe in #3532

🔧 Maintenance

• test(fvt): speedup functional test runs by @dnwe in #3528

Full Changelog: v1.48.1...v1.48.2

Version 1.48.1 (2026-05-10)

What's Changed

🐛 Fixes

• perf: cache topic batch-size metric lookup by @huynhanx03 in #3498
• fix: stabilise TestFuncTxnProduceAndCommitOffset flakes by @dnwe in #3517
• test: relax producer batch metrics assertions by @DCjanus in #3523
• fix: prevent race during partition consumer close by @dnwe in #3524
• fix: return leaderless errors in metadata refresh by @dnwe in #3525

📦 Dependency updates

• chore(deps): update dependency golangci/golangci-lint to v2.12.1 by @renovate[bot] in #3509
• chore(deps): bump github.com/klauspost/compress from 1.18.5 to 1.18.6 by @dependabot[bot] in #3508
• chore(deps): bump golang.org/x/sys from 0.43.0 to 0.44.0 in the golang-x group across 1 directory by @dependabot[bot] in #3520
• chore(deps): update module golang.org/x/crypto to v0.51.0 by @renovate[bot] in #3521
• fix(deps): update module golang.org/x/net to v0.54.0 by @renovate[bot] in #3526
• chore(deps): update dependency golangci/golangci-lint to v2.12.2 by @renovate[bot] in #3515

🔧 Maintenance

• chore: add testifylint and fix lint warnings by @dnwe in #3522

New Contributors

• @huynhanx03 made their first contribution in #3498

Full Changelog: v1.48.0...v1.48.1

Version 1.48.0 (2026-04-24)

What's Changed

🎉 New Features / Improvements

• feat(producer): partition muting for msg ordering by @dnwe in #3422

🐛 Fixes

• fix: handle nullable metadata in OffsetFetchResponse by @dnwe in #3473
• fix: nil response/done channels after SASLv1 failure by @dnwe in #3474
• fix(protocol): handle ElectLeaders V1 non-flexible headers by @DCjanus in #3478
• fix: correct a number of goroutine leaks by @dnwe in #3476
• fix: resolve deadlock in concurrent offset commits by @dnwe in #3477
• fix(consumer): avoid broker race in response feeder by @DCjanus in #3486
• fix: stop dispatcher for dying children in brokerConsumer.abort() by @lizthegrey in #3492
• fix: close broken tcp connections by @Asphaltt in #3384
• fix: add Unwrap() to DescribeConfigError and AlterConfigError by @ShinThirty in #3487

📦 Dependency updates

• chore(deps): update dependency golangci/golangci-lint to v2.11.1 by @renovate[bot] in #3462
• chore(deps): bump github.com/pierrec/lz4/v4 from 4.1.25 to 4.1.26 by @dependabot[bot] in #3461
• chore(deps): bump golang.org/x/sync from 0.19.0 to 0.20.0 in the golang-x group across 1 directory by @dependabot[bot] in #3466
• chore(deps): update module golang.org/x/crypto to v0.49.0 by @renovate[bot] in #3468
• chore(deps): update dependency golangci/golangci-lint to v2.11.3 by @renovate[bot] in #3464
• fix(deps): update module golang.org/x/net to v0.52.0 by @renovate[bot] in #3472
• fix(deps): update module github.com/klauspost/compress to v1.18.5 by @renovate[bot] in #3480
• chore(deps): update module golang.org/x/crypto to v0.50.0 by @renovate[bot] in #3489
• fix(deps): update module golang.org/x/net to v0.53.0 by @renovate[bot] in #3493
• chore(deps): update docker/setup-buildx-action action to v4 by @renovate[bot] in #3458
• chore(deps): update docker/bake-action action to v7.1.0 by @renovate[bot] in #3459

🔧 Maintenance

• chore: add kafka versions 3.9.2 and 4.2.0 by @edoardocomar in #3471

📝 Documentation

• Update the Kakfa Protocol Specification Link by @MohishKhadse55 in #3463

➕ Other Changes

• chore(deps): update dependency golangci/golangci-lint to v2.11.4 by @renovate[bot] in #3482
• fix: update API version URL as previous link was not working by @MohishKhadse55 in #3485

New Contributors

• @MohishKhadse55 made their first contribution in #3463
• @Asphaltt made their first contribution in #3384
• @ShinThirty made their first contribution in #3487

Full Changelog: v1.47.0...v1.48.0