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Confluent's Python client for Apache Kafka

v1.8.2

v1.8.2 is a maintenance release with the following fixes and enhancements:

  • IMPORTANT: Added mandatory use.deprecated.format to ProtobufSerializer and ProtobufDeserializer. See Upgrade considerations below for more information.
  • Python 2.7 binary wheels are no longer provided. Users still on Python 2.7 will need to build confluent-kafka from source and install librdkafka separately, see README.md for build instructions.
  • Added use.latest.version and skip.known.types (Protobuf) to the Serializer classes. (Robert Yokota, #1133).
  • list_topics() and list_groups() added to AdminClient.
  • Added support for headers in the SerializationContext (Laurent Domenech-Cabaud)
  • Fix crash in header parsing (Armin Ronacher, #1165)
  • Added long package description in setuptools (Bowrna, #1172).
  • Documentation fixes by Aviram Hassan and Ryan Slominski.
  • Don't raise AttributeError exception when CachedSchemaRegistryClient constructor raises a valid exception.

confluent-kafka-python is based on librdkafka v1.8.2, see the librdkafka release notes for a complete list of changes, enhancements, fixes and upgrade considerations.

Note: There were no v1.8.0 and v1.8.1 releases.

Upgrade considerations

Protobuf serialization format changes

Prior to this version the confluent-kafka-python client had a bug where nested protobuf schemas indexes were incorrectly serialized, causing incompatibility with other Schema-Registry protobuf consumers and producers.

This has now been fixed, but since the old defect serialization and the new correct serialization are mutually incompatible the user of confluent-kafka-python will need to make an explicit choice which serialization format to use during a transitory phase while old producers and consumers are upgraded.

The ProtobufSerializer and ProtobufDeserializer constructors now both take a (for the time being) configuration dictionary that requires the use.deprecated.format configuration property to be explicitly set.

Producers should be upgraded first and as long as there are old (<=v1.7.0) Python consumers reading from topics being produced to, the new (>=v1.8.2) Python producer must be configured with use.deprecated.format set to True.

When all existing messages in the topic have been consumed by older consumers the consumers should be upgraded and both new producers and the new consumers must set use.deprecated.format to False.

The requirement to explicitly set use.deprecated.format will be removed in a future version and the setting will then default to False (new format).

v1.7.0

v1.7.0 is a maintenance release with the following fixes and enhancements:

  • Add error_cb to confluent_cloud.py example (#1096).
  • Clarify that doc output varies based on method (@slominskir, #1098).
  • Docs say Schema when they mean SchemaReference (@slominskir, #1092).
  • Add documentation for NewTopic and NewPartitions (#1101).

confluent-kafka-python is based on librdkafka v1.7.0, see the librdkafka release notes for a complete list of changes, enhancements, fixes and upgrade considerations.

v1.6.1

v1.6.1 is a feature release:

  • KIP-429 - Incremental consumer rebalancing support.
  • OAUTHBEARER support.

Fixes

  • Add return_record_name=True to AvroDeserializer (@slominskir, #1028)
  • Fix deprecated schema.Parse call (@casperlehmann, #1006).
  • Make reader schema optional in AvroDeserializer (@97nitt, #1000).
  • Add **kwargs to legacy AvroProducer and AvroConsumer constructors to support all Consumer and Producer base class constructor arguments, such as logger (@venthur, #699).
  • Add bool for permanent schema delete (@slominskir, #1029).
  • The avro package is no longer required for Schema-Registry support (@jaysonsantos, #950).
  • Only write to schema cache once, improving performance (@fimmtiu, #724).
  • Improve Schema-Registry error reporting (@jacopofar, #673).
  • producer.flush() could return a non-zero value without hitting the specified timeout.

confluent-kafka-python is based on librdkafka v1.6.1, see the librdkafka release notes for a complete list of changes, enhancements, fixes and upgrade considerations.

v1.6.0

v1.6.0 is a feature release with the following features, fixes and enhancements:

  • Bundles librdkafka v1.6.0 which adds support for Incremental rebalancing, Sticky producer partitioning, Transactional producer scalabilty improvements, and much much more. See link to release notes below.
  • Rename asyncio.py example to avoid circular import (#945)
  • The Linux wheels are now built with manylinux2010 (rather than manylinux1) since OpenSSL v1.1.1 no longer builds on CentOS 5. Older Linux distros may thus no longer be supported, such as CentOS 5.
  • The in-wheel OpenSSL version has been updated to 1.1.1i.
  • Added Message.latency() to retrieve the per-message produce latency.
  • Added trove classifiers.
  • Consumer destructor will no longer trigger consumer_close(), consumer.close() must now be explicitly called if the application wants to leave the consumer group properly and commit final offsets.
  • Fix PY_SSIZE_T_CLEAN warning
  • Move confluent_kafka/ to src/ to avoid pytest/tox picking up the local dir
  • Added producer.purge() to purge messages in-queue/flight (@peteryin21, #548)
  • Added AdminClient.list_groups() API (@messense, #948)
  • Rename asyncio.py example to avoid circular import (#945)

confluent-kafka-python is based on librdkafka v1.6.0, see the librdkafka release notes for a complete list of changes, enhancements, fixes and upgrade considerations.

v1.5.2

v1.5.2 is a maintenance release with the following fixes and enhancements:

  • Add producer purge method with optional blocking argument (@peteryin21, #548)
  • Add AdminClient.list_groups API (@messense, #948)
  • Rename asyncio.py example to avoid circular import (#945)
  • Upgrade bundled OpenSSL to v1.1.1h (from v1.0.2u)
  • The Consumer destructor will no longer trigger consumer.close() callbacks, consumer.close() must now be explicitly called to cleanly close down the consumer and leave the group.
  • Fix PY_SSIZE_T_CLEAN warning in calls to produce().
  • Restructure source tree to avoid undesired local imports of confluent_kafka when running pytest.

confluent-kafka-python is based on librdkafka v1.5.2, see the librdkafka release notes for a complete list of changes, enhancements, fixes and upgrade considerations.

Note: There was no v1.5.1 release

v1.5.0

v1.5.0 is a maintenance release with the following fixes and enhancements:

confluent-kafka-python is based on librdkafka v1.5.0, see the librdkafka release notes for a complete list of changes, enhancements, fixes and upgrade considerations.