2.3.0

Minor Version Features

• Added the ManagedBalancedConsumer class, which performs balanced consumption
  using the Kafka 0.9 Group Membership API
• Added the managed keyword argument to Topic.get_balanced_consumer to access
  ManagedBalancedConsumer
• Added a compacted_topic kwarg to BalancedConsumer to make it smarter about
  offset ordering for compacted topics
• Added methods to Broker that use the Group Membership API
• Changed the terminology "offset manager" to "group coordinator" to match updated
  Kafka jargon
• Added new exception types from Kafka 0.9
• Added auto_start keyword argument to Producer to match the consumer interface
• Added max_request_size keyword argument to Producer to catch large messages
  before they're sent to Kafka
• Added protocol functions for the Group Membership API
• New SimpleConsumer keyword arguments: compacted_topic, generation_id,
  consumer_id

Bug Fixes

• Fixed a bug in Travis config causing tests not to run against Kafka 0.9
• Upgraded to non-beta gevent version
• Allowed a single Broker instance to maintain multiple connections to a broker
  (useful when multiple consumers are sharing the same KafkaClient)
• Allowed switchable socket implementations when using gevent
• Handled TypeError during worker thread shutdown to avoid nuisance messages
• Limited Producer.min_queued_messages to 1 when sync=True
• Monkeypatched a bug in py.test causing tests to be erroneously skipped

Miscellaneous

• Added an issue template

2.2.1

Bug Fixes

• Fixed Travis issues related to PyPy testing
• Fixed deprecated dependency on gevent.coros
• Enabled caching in Travis for pip, librdkafka, and kafka installations
• Fixed a crash during metadata updating related to zookeeper fallback
• Unified connection retry logic in Cluster
• Raised an exception if consumer offset reset fails after maximum retries
• Fixed a bug allowing get_delivery_report to indefinitely block produce()
• Fixed a bug causing producers to drop to_retry messages on stop()
• Added retry logic to offset limit fetching

2.2.0

Minor Version Features

• Added support for gevent-based concurrency in pure cpython
• Allowed ZooKeeper hosts to be specified directly to KafkaClient instead of
  being treated as a fallback

Bug Fixes

• Fixed a bug causing RLock-related crashes in Python 3
• Used the more stable sha1 hash function as the default for
  hashing_partitioner
• Fixed a bug in the meaning of linger_ms in the producer

2.1.2

Features

• Allowed consumers to run with no partitions

Bug Fixes

• Fixed a bug causing consumers to hold outdated partition sets
• Handled some previously uncaught error codes in SimpleConsumer
• Fixed an off-by-one bug in message set fetching
• Made consume() stricter about message ordering and duplication

2.1.1

Features

• Improved unicode-related error reporting in several components
• Removed the ZooKeeper checker thread from the BalancedConsumer
• Added a test consumer CLI to kafka_tools

Bug Fixes

• Fixed a memory leak in the rdkafka-based consumer
• Fixed offset committing to work against Kafka 0.9
• Improved the reliability of the Kafka test harness

Miscellaneous

• Simplified the Travis test matrix to handle testing against multiple Kafka versions

2.1.0

Features

• Addded an optional C extension making use of librdkafka for enhanced producer and
  consumer performance
• Added a delivery report queue to the Producer allowing per-message errors
  to be handled
• Added a callback indicating that the BalancedConsumer is in the process of rebalancing

Bug Fixes

• Fixed a longstanding issue causing certain tests to hang on Travis
• Fixed a bug causing the default error handles in the consumer to mask unknown error
  codes
• Moved the Message class to using __slots__ to minimize its memory footprint

2.0.4

Features

• Allowed discovery of Kafka brokers via a ZooKeeper connect string supplied to
  KafkaClient

Bug Fixes

• Made BalancedConsumer's ZooKeeper watches close quietly on consumer exit
• Disconnect sockets in response to any socket-level errors
• Fixed HashingPartitioner for python 3

2.0.3

Features

• Raise exceptions from worker threads to the main thread in BalancedConsumer
• Call stop() when BalancedConsumer is finalized to minimize zombie threads

Bug Fixes

• Use weak references in BalancedConsumer workers to avoid zombie threads creating
  memory leaks
• Stabilize BalancedConsumer.start()
• Fix a bug in TopicDict.values() causing topics to be listed as None
• Handle IOError in BrokerConnection and socket.recvall_into
• Unconditionally update partitions' leaders after metadata requests
• Fix thread-related memory leaks in Producer
• Handle connection errors during offset commits
• Fix an interpreter error in SimpleConsumer

2.0.2

Features

• Switched the BalancedConsumer to using ZooKeeper as the single source of truth
  about which partitions are held
• Made BalancedConsumer resilient to ZooKeeper failure
• Made the consumer resilient to broker failure

Bug Fixes

• Fixed a bug in BrokerConnection causing the message length field to
  occasionally be corrupted
• Fixed a bug causing RequestHandler worker threads to sometimes abort
  before the request was completed
• Fixed a bug causing SimpleConsumer to hang when the number of brokers in
  the cluster goes below the replication factor

2.0.1

Features

• Added support for python 3.5
• Added iteration to the BalancedConsumer
• Disallowed min_queued_messages<1 in Producer
• Made SimpleConsumer commit offsets on stop()
• Supported None in message values

Bug Fixes

• Improved BalancedConsumer's handling of an external KazooClient instance
• Fixed kafka_tools.py for Python 3
• Removed the unused use_greenlets kwarg from KafkaClient
• Improved Cluster's ability to reconnect to brokers during metadata updates
• Fixed an interpreter error in conncection.py
• Fixed failure case in Producer when required_acks==0
• Fixed a bug causing SimpleConsumer to leave zombie threads after disconnected brokers
• Improved SimpleConsumer's worker thread exception reporting
• Simplified SimpleConsumer's partition locking logic during fetch by using RLock
• Fixed SimpleConsumer off-by-one error causing lag to never reach 0

Miscellaneous

• Switched from Coveralls to Codecov for converage tracking