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# Rdkafka Changelog

## Rdkafka Changelog / 0.24.0 (Unreleased)
- **[Feature]** Add `Producer#queue_size` (and `#queue_length` alias) to report the number of messages waiting in the librdkafka output queue. Useful for monitoring producer backpressure, implementing custom flow control, debugging message delivery issues, and graceful shutdown logic.
- **[Deprecation]** `AbstractHandle#wait` parameter `max_wait_timeout` (seconds) is deprecated in favor of `max_wait_timeout_ms` (milliseconds). The old parameter still works with backwards compatibility but will be removed in v1.0.0.
- **[Deprecation]** `PartitionsCountCache` constructor parameter `ttl` (seconds) is deprecated in favor of `ttl_ms` (milliseconds). The old parameter still works with backwards compatibility but will be removed in v1.0.0.
- [Enhancement] Add Ruby 4.0 support.
- [Enhancement] Add `Rdkafka::Defaults` module with centralized timeout constants (aligning with upstream refactor).
- [Enhancement] Extract all hardcoded timeout values to named constants for better maintainability and discoverability.
- [Enhancement] Bump librdkafka to 2.13.0.
- [Fix] Fix Kerberos build on Alpine 3.23+ (GCC 15/C23) by forcing C17 semantics to maintain compatibility with old-style K&R declarations in MIT Kerberos and Cyrus SASL dependencies.

## Rdkafka Changelog / 0.23.1 (2025-11-14)
- **[Feature]** Add integrated fatal error handling in `RdkafkaError.validate!` - automatically detects and handles fatal errors (-150) with single entrypoint API.
- [Enhancement] Add optional `client_ptr` parameter to `validate!` for automatic fatal error remapping to actual underlying error codes.
- [Enhancement] Update all Producer and Consumer `validate!` calls to provide `client_ptr` for comprehensive fatal error handling.
- [Enhancement] Add `rd_kafka_fatal_error()` FFI binding to retrieve actual fatal error details.
- [Enhancement] Add `rd_kafka_test_fatal_error()` FFI binding for testing fatal error scenarios.
- [Enhancement] Add `RdkafkaError.build_fatal` class method for centralized fatal error construction.
- [Enhancement] Add comprehensive tests for fatal error handling including unit tests and integration tests.
- [Enhancement] Add `RD_KAFKA_PARTITION_UA` constant for unassigned partition (-1).
- [Enhancement] Replace magic numbers with named constants: use `RD_KAFKA_RESP_ERR_NO_ERROR` instead of `0` for error code checks (18 instances) and `RD_KAFKA_PARTITION_UA` instead of `-1` for partition values (9 instances) across the codebase for better code clarity and maintainability.
- [Enhancement] Add `Rdkafka::Testing` module for testing fatal error scenarios on both producers and consumers.
- [Deprecated] `RdkafkaError.validate_fatal!` - use `validate!` with `client_ptr` parameter instead.

## Rdkafka Changelog / 0.23.0 (2025-11-01)
- [Enhancement] Bump librdkafka to 2.12.1.
- [Enhancement] Force lock FFI to 1.17.1 or higher to include critical bug fixes around GCC, write barriers, and thread restarts for forks.
- [Fix] Fix for Core dump when providing extensions to oauthbearer_set_token (dssjoblom)

## Rdkafka Changelog / 0.22.2 (2025-10-09)
- [Fix] Fix Github Action Ruby reference preventing non-compiled releases.

## Rdkafka Changelog / 0.22.1 (2025-10-09)
- [Enhancement] Optimize header processing to eliminate double hash lookups and method checking overhead.
- [Enhancement] Optimize producer header processing with early returns and efficient array operations (69% faster for nil headers, 41% faster for empty headers, 12-32% faster when headers are present, with larger improvements for complex header scenarios).

## Rdkafka Changelog / 0.22.0 (2025-09-26)
- **[EOL]** Drop support for Ruby 3.1 to move forward with the fiber scheduler work.
- [Enhancement] Bump librdkafka to 2.11.1.
- [Enhancement] Improve sigstore attestation for precompiled releases.
- [Fix] Fix incorrectly set default SSL certs dir.
- [Fix] Disable OpenSSL Heartbeats during compilation.

## Rdkafka Changelog / 0.21.0 (2025-08-18)
- [Enhancement] Support explicit Debian testing due to lib issues.
- [Enhancement] Support ARM64 Gnu precompilation.
- [Enhancement] Bump librdkafka to 2.11.0.
- [Enhancement] Improve what symbols are exposed outside of the precompiled extensions.
- [Enhancement] Introduce an integration suite layer for non RSpec specs execution.
- [Fix] Add `json` gem as a dependency (was missing but used).

## Rdkafka Changelog / 0.20.1 (2025-07-17)
- [Enhancement] Drastically increase number of platforms in the integration suite
- [Fix] Support Ubuntu `22.04` and older Alpine precompiled versions
- [Fix] FFI::DynamicLibrary.load_library': Could not open library
- [Change] Add new CI action to trigger auto-doc refresh.

## Rdkafka Changelog / 0.20.0 (2025-07-17)
- **[Feature]** Add precompiled `x86_64-linux-gnu` setup.
- **[Feature]** Add precompiled `x86_64-linux-musl` setup.
- **[Feature]** Add precompiled `macos_arm64` setup.
- [Enhancement] Run all specs on each of the platforms with and without precompilation.
- [Enhancement] Support transactional id in the ACL API.
- [Fix] Fix a case where using empty key on the `musl` architecture would cause a segfault.
- [Fix] Fix for null pointer reference bypass on empty string being too wide causing segfault.

**Note**: Precompiled extensions are a new feature in this release. While they significantly improve installation speed and reduce build dependencies, they should be thoroughly tested in your staging environment before deploying to production. If you encounter any issues with precompiled extensions, you can fall back to building from sources. For more information, see the [Native Extensions](https://karafka.io/docs/Development-Native-Extensions/).

## Rdkafka Changelog / 0.19.5 (2025-05-30)
- [Enhancement] Allow for producing to non-existing topics with `key` and `partition_key` present.

## Rdkafka Changelog / 0.19.4 (2025-05-23)
- [Change] Move to trusted-publishers and remove signing since no longer needed.

## Rdkafka Changelog / 0.19.3 (2025-05-23)
- [Enhancement] Include broker message in the error full message if provided.

## Rdkafka Changelog / 0.19.2 (2025-05-20)
- [Enhancement] Replace TTL-based partition count cache with a global cache that reuses `librdkafka` statistics data when possible.
- [Enhancement] Roll out experimental jruby support.
- [Fix] Fix issue where post-closed producer C topics refs would not be cleaned.
- [Fix] Fiber causes Segmentation Fault.
- [Change] Move to trusted-publishers and remove signing since no longer needed.

## Rdkafka Changelog / 0.19.1 (2025-04-07)
- [Enhancement] Support producing and consuming of headers with mulitple values (KIP-82).
- [Enhancement] Allow native Kafka customization poll time.

## Rdkafka Changelog / 0.19.0 (2025-01-20)
- **[Breaking]** Deprecate and remove `#each_batch` due to data consistency concerns.
- [Enhancement] Bump librdkafka to 2.8.0
- [Fix] Restore `Rdkafka::Bindings.rd_kafka_global_init` as it was not the source of the original issue.

## Rdkafka Changelog / 0.18.1 (2024-12-04)
- [Fix] Do not run `Rdkafka::Bindings.rd_kafka_global_init` on require to prevent some of macos versions from hanging on Puma fork.

## Rdkafka Changelog / 0.18.0 (2024-11-26)
- **[EOL]** Drop Ruby 3.0 support
- [Enhancement] Bump librdkafka to 2.6.1
- [Enhancement] Use default oauth callback if none is passed (bachmanity1)
- [Enhancement] Expose `rd_kafka_global_init` to mitigate macos forking issues.
- [Patch] Retire no longer needed cooperative-sticky patch.

## Rdkafka Changelog / 0.17.6 (2024-09-03)
- [Fix] Fix incorrectly behaving CI on failures.
- [Fix] Fix invalid patches librdkafka references.

## Rdkafka Changelog / 0.17.5 (2024-09-03)
- [Patch] Patch with "Add forward declaration to fix compilation without ssl" fix

## Rdkafka Changelog / 0.17.4 (2024-09-02)
- [Enhancement] Bump librdkafka to 2.5.3
- [Enhancement] Do not release GVL on `rd_kafka_name` (ferrous26)
- [Fix] Fix unused variable reference in producer (lucasmvnascimento)

## Rdkafka Changelog / 0.17.3 (2024-08-09)
- [Fix] Mitigate a case where FFI would not restart the background events callback dispatcher in forks.

## Rdkafka Changelog / 0.17.2 (2024-08-07)
- [Enhancement] Support returning `#details` for errors that do have topic/partition related extra info.

## Rdkafka Changelog / 0.17.1 (2024-08-01)
- [Enhancement] Support ability to release patches to librdkafka.
- [Patch] Patch cooperative-sticky assignments in librdkafka.

## Rdkafka Changelog / 0.17.0 (2024-07-21)
- [Enhancement] Bump librdkafka to 2.5.0

## Rdkafka Changelog / 0.16.1 (2024-07-10)
- [Feature] Add `#seek_by` to be able to seek for a message by topic, partition and offset (zinahia)
- [Change] Remove old producer timeout API warnings.
- [Fix] Switch to local release of librdkafka to mitigate its unavailability.

## Rdkafka Changelog / 0.16.0 (2024-06-17)
- **[Breaking]** Messages without headers returned by `#poll` contain frozen empty hash.
- **[Breaking]** `HashWithSymbolKeysTreatedLikeStrings` has been removed so headers are regular hashes with string keys.
- [Enhancement] Bump librdkafka to 2.4.0
- [Enhancement] Save two objects on message produced and lower CPU usage on message produced with small improvements.
- **[EOL]** Remove support for Ruby 2.7. Supporting it was a bug since rest of the karafka ecosystem no longer supports it.

## Rdkafka Changelog / 0.15.2 (2024-07-10)
- [Fix] Switch to local release of librdkafka to mitigate its unavailability.

## Rdkafka Changelog / 0.15.1 (2024-05-09)
- **[Feature]** Provide ability to use topic config on a producer for custom behaviors per dispatch.
- [Enhancement] Use topic config reference cache for messages production to prevent topic objects allocation with each message.
- [Enhancement] Provide `Rrdkafka::Admin#describe_errors` to get errors descriptions (mensfeld)

## Rdkafka Changelog / 0.15.0 (2024-04-26)
- **[Feature]** Oauthbearer token refresh callback (bruce-szalwinski-he)
- **[Feature]** Support incremental config describe + alter API (mensfeld)
- [Enhancement] name polling Thread as `rdkafka.native_kafka#<name>` (nijikon)
- [Enhancement] Replace time poll based wait engine with an event based to improve response times on blocking operations and wait (nijikon + mensfeld)
- [Enhancement] Allow for usage of the second regex engine of librdkafka by setting `RDKAFKA_DISABLE_REGEX_EXT` during build (mensfeld)
- [Enhancement] name polling Thread as `rdkafka.native_kafka#<name>` (nijikon)
- [Change] Allow for native kafka thread operations deferring and manual start for consumer, producer and admin.
- [Change] The `wait_timeout` argument in `AbstractHandle.wait` method is deprecated and will be removed in future versions without replacement. We don't rely on it's value anymore (nijikon)
- [Fix] Fix bogus case/when syntax. Levels 1, 2, and 6 previously defaulted to UNKNOWN (jjowdy)

## Rdkafka Changelog / 0.14.11 (2024-07-10)
- [Fix] Switch to local release of librdkafka to mitigate its unavailability.

## Rdkafka Changelog / 0.14.10 (2024-02-08)
- [Fix] Background logger stops working after forking causing memory leaks (mensfeld).

## Rdkafka Changelog / 0.14.9 (2024-01-29)
- [Fix] Partition cache caches invalid `nil` result for `PARTITIONS_COUNT_TTL`.
- [Enhancement] Report `-1` instead of `nil` in case `partition_count` failure.

## Rdkafka Changelog / 0.14.8 (2024-01-24)
- [Enhancement] Provide support for Nix OS (alexandriainfantino)
- [Enhancement] Skip intermediate array creation on delivery report callback execution (one per message) (mensfeld)

## Rdkafka Changelog / 0.14.7 (2023-12-29)
- [Fix] Recognize that Karafka uses a custom partition object (fixed in 2.3.0) and ensure it is recognized.

## Rdkafka Changelog / 0.14.6 (2023-12-29)
- **[Feature]** Support storing metadata alongside offsets via `rd_kafka_offsets_store` in `#store_offset` (mensfeld)
- [Enhancement] Increase the `#committed` default timeout from 1_200ms to 2000ms. This will compensate for network glitches and remote clusters operations and will align with metadata query timeout.

## Rdkafka Changelog / 0.14.5 (2023-12-20)
- [Enhancement] Provide `label` producer handler and report reference for improved traceability.

## Rdkafka Changelog / 0.14.4 (2023-12-19)
- [Enhancement] Add ability to store offsets in a transaction (mensfeld)

## Rdkafka Changelog / 0.14.3 (2023-12-17)
- [Enhancement] Replace `rd_kafka_offset_store` with `rd_kafka_offsets_store` (mensfeld)
- [Fix] Missing ACL `RD_KAFKA_RESOURCE_BROKER` constant reference (mensfeld)
- [Change] Rename `matching_acl_pattern_type` to `matching_acl_resource_pattern_type` to align the whole API (mensfeld)

## Rdkafka Changelog / 0.14.2 (2023-12-11)
- [Enhancement] Alias `topic_name` as `topic` in the delivery report (mensfeld)
- [Fix] Fix return type on `#rd_kafka_poll` (mensfeld)
- [Fix] `uint8_t` does not exist on Apple Silicon (mensfeld)

## Rdkafka Changelog / 0.14.1 (2023-12-02)
- **[Feature]** Add `Admin#metadata` (mensfeld)
- **[Feature]** Add `Admin#create_partitions` (mensfeld)
- **[Feature]** Add `Admin#delete_group` utility (piotaixr)
- **[Feature]** Add Create and Delete ACL Feature To Admin Functions (vgnanasekaran)
- **[Enhancement]** Improve error reporting on `unknown_topic_or_part` and include missing topic (mensfeld)
- **[Enhancement]** Improve error reporting on consumer polling errors (mensfeld)

## Rdkafka Changelog / 0.14.0 (2023-11-17)
- [Enhancement] Bump librdkafka to 2.3.0
- [Enhancement] Increase the `#lag` and `#query_watermark_offsets` default timeouts from 100ms to 1000ms. This will compensate for network glitches and remote clusters operations.

## Rdkafka Changelog / 0.13.10 (2024-07-10)
- [Fix] Switch to local release of librdkafka to mitigate its unavailability.

## Rdkafka Changelog / 0.13.9 (2023-11-07)
- [Enhancement] Expose alternative way of managing consumer events via a separate queue.
- [Enhancement] Allow for setting `statistics_callback` as nil to reset predefined settings configured by a different gem.

## Rdkafka Changelog / 0.13.8 (2023-10-31)
- [Enhancement] Get consumer position (thijsc & mensfeld)

## Rdkafka Changelog / 0.13.7 (2023-10-31)
- **[EOL]** Drop support for Ruby 2.6 due to incompatibilities in usage of `ObjectSpace::WeakMap`
- [Fix] Fix dangling Opaque references.

## Rdkafka Changelog / 0.13.6 (2023-10-17)
- **[Feature]** Support transactions API in the producer
- [Enhancement] Add `raise_response_error` flag to the `Rdkafka::AbstractHandle`.
- [Enhancement] Provide `#purge` to remove any outstanding requests from the producer.
- [Enhancement] Fix `#flush` does not handle the timeouts errors by making it return true if all flushed or false if failed. We do **not** raise an exception here to keep it backwards compatible.

## Rdkafka Changelog / 0.13.5
- Fix DeliveryReport `create_result#error` being nil despite an error being associated with it

## Rdkafka Changelog / 0.13.4
- Always call initial poll on librdkafka to make sure oauth bearer cb is handled pre-operations.

## Rdkafka Changelog / 0.13.3
- Bump librdkafka to 2.2.0

## Rdkafka Changelog / 0.13.2
- Ensure operations counter decrement is fully thread-safe
- Bump librdkafka to 2.1.1

## Rdkafka Changelog / 0.13.1
- Add offsets_for_times method on consumer (timflapper)

## Rdkafka Changelog / 0.13.0 (2023-07-24)
- Support cooperative sticky partition assignment in the rebalance callback (methodmissing)
- Support both string and symbol header keys (ColinDKelley)
- Handle tombstone messages properly (kgalieva)
- Add topic name to delivery report (maeve)
- Allow string partitioner config (mollyegibson)
- Fix documented type for DeliveryReport#error (jimmydo)
- Bump librdkafka to 2.0.2 (lmaia)
- Use finalizers to cleanly exit producer and admin (thijsc)
- Lock access to the native kafka client (thijsc)
- Fix potential race condition in multi-threaded producer (mensfeld)
- Fix leaking FFI resources in specs (mensfeld)
- Improve specs stability (mensfeld)
- Make metadata request timeout configurable (mensfeld)
- call_on_partitions_assigned and call_on_partitions_revoked only get a tpl passed in (thijsc)
- Support `#assignment_lost?` on a consumer to check for involuntary assignment revocation (mensfeld)
- Expose `#name` on the consumer and producer (mensfeld)
- Introduce producer partitions count metadata cache (mensfeld)
- Retry metadta fetches on certain errors with a backoff (mensfeld)
- Do not lock access to underlying native kafka client and rely on Karafka granular locking (mensfeld)

## Rdkafka Changelog / 0.12.4 (2024-07-10)
- [Fix] Switch to local release of librdkafka to mitigate its unavailability.

## Rdkafka Changelog / 0.12.3
- Include backtrace in non-raised binded errors.
- Include topic name in the delivery reports

## Rdkafka Changelog / 0.12.2
- Increase the metadata default timeout from 250ms to 2 seconds. This should allow for working with remote clusters.

## Rdkafka Changelog / 0.12.1
- Bumps librdkafka to 2.0.2 (lmaia)
- Add support for adding more partitions via Admin API

## Rdkafka Changelog / 0.12.0 (2022-06-17)
- Bumps librdkafka to 1.9.0
- Fix crash on empty partition key (mensfeld)
- Pass the delivery handle to the callback (gvisokinskas)

## Rdkafka Changelog / 0.11.0 (2021-11-17)
- Upgrade librdkafka to 1.8.2
- **[EOL]** Bump supported minimum Ruby version to 2.6
- Better homebrew path detection

## Rdkafka Changelog / 0.10.0 (2021-09-07)
- Upgrade librdkafka to 1.5.0
- Add error callback config

## Rdkafka Changelog / 0.9.0 (2021-06-23)
- Fixes for Ruby 3.0
- Allow any callable object for callbacks (gremerritt)
- Reduce memory allocations in Rdkafka::Producer#produce (jturkel)
- Use queue as log callback to avoid unsafe calls from trap context (breunigs)
- Allow passing in topic configuration on create_topic (dezka)
- Add each_batch method to consumer (mgrosso)

## Rdkafka Changelog / 0.8.1 (2020-12-07)
- Fix topic_flag behaviour and add tests for Metadata (geoff2k)
- Add topic admin interface (geoff2k)
- Raise an exception if @native_kafka is nil (geoff2k)
- Option to use zstd compression (jasonmartens)

## Rdkafka Changelog / 0.8.0 (2020-06-02)
- Upgrade librdkafka to 1.4.0
- Integrate librdkafka metadata API and add partition_key (by Adithya-copart)
- Ruby 2.7 compatibility fix (by Geoff Thé)A
- Add error to delivery report (by Alex Stanovsky)
- Don't override CPPFLAGS and LDFLAGS if already set on Mac (by Hiroshi Hatake)
- Allow use of Rake 13.x and up (by Tomasz Pajor)

## Rdkafka Changelog / 0.7.0 (2019-09-21)
- Bump librdkafka to 1.2.0 (by rob-as)
- Allow customizing the wait time for delivery report availability (by mensfeld)

## Rdkafka Changelog / 0.6.0 (2019-07-23)
- Bump librdkafka to 1.1.0 (by Chris Gaffney)
- Implement seek (by breunigs)

## Rdkafka Changelog / 0.5.0 (2019-04-11)
- Bump librdkafka to 1.0.0 (by breunigs)
- Add cluster and member information (by dmexe)
- Support message headers for consumer & producer (by dmexe)
- Add consumer rebalance listener (by dmexe)
- Implement pause/resume partitions (by dmexe)

## Rdkafka Changelog / 0.4.2 (2019-01-12)
- Delivery callback for producer
- Document list param of commit method
- Use default Homebrew openssl location if present
- Consumer lag handles empty topics
- End iteration in consumer when it is closed
- Add support for storing message offsets
- Add missing runtime dependency to rake

## Rdkafka Changelog / 0.4.1 (2018-10-19)
- Bump librdkafka to 0.11.6

## Rdkafka Changelog / 0.4.0 (2018-09-24)
- Improvements in librdkafka archive download
- Add global statistics callback
- Use Time for timestamps, potentially breaking change if you
  rely on the previous behavior where it returns an integer with
  the number of milliseconds.
- Bump librdkafka to 0.11.5
- Implement TopicPartitionList in Ruby so we don't have to keep
  track of native objects.
- Support committing a topic partition list
- Add consumer assignment method

## Rdkafka Changelog / 0.3.5 (2018-01-17)
- Fix crash when not waiting for delivery handles
- Run specs on Ruby 2.5

## Rdkafka Changelog / 0.3.4 (2017-12-05)
- Bump librdkafka to 0.11.3

## Rdkafka Changelog / 0.3.3 (2017-10-27)
- Fix bug that prevent display of `RdkafkaError` message

## Rdkafka Changelog / 0.3.2 (2017-10-25)
- `add_topic` now supports using a partition count
- Add way to make errors clearer with an extra message
- Show topics in subscribe error message
- Show partition and topic in query watermark offsets error message

## Rdkafka Changelog / 0.3.1 (2017-10-23)
- Bump librdkafka to 0.11.1
- Officially support ranges in `add_topic` for topic partition list.
- Add consumer lag calculator

## Rdkafka Changelog / 0.3.0 (2017-10-17)
- Move both add topic methods to one `add_topic` in `TopicPartitionList`
- Add committed offsets to consumer
- Add query watermark offset to consumer

## Rdkafka Changelog / 0.2.0 (2017-10-13)
- Some refactoring and add inline documentation

## Rdkafka Changelog / 0.1.x (2017-09-10)
- Initial working version including producing and consuming


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*Last modified: 2026-01-22 12:36:26*