kcat v1.8.0

Added new mock cluster mode kcat -M <broker-cnt> spins up a mock cluster that applications can produce to and consume from.
Mixing modes is now prohibited (e.g., -P .. -C).
Producer: Fix stdin buffering: no messages would be produced until Ctrl-D or at least 1024 bytes had accumulated (#343).

kcat v1.7.1

The edenhill/kcat image has been updated to librdkafka v1.8.2.

kcat v1.7.0

kafkacat has been renamed to kcat to adhere to the Apache Software Foundation's (ASF) trademark policies.

kafkacat is now called kcat.
Add support for multibyte delimiters to -D and -K (#140, #280)
Add support for -X partition.assignment.strategy=cooperative-sticky incremental rebalancing.
High-level consumer -G now supports exit-on-eof -e option (#86)
Avro consumer with -J will now emit key_schema_id and value_schema_id.

Upgrade considerations

Please rename any kafkacat.conf config files to kcat.conf. The old path will continue to work for some time but a warning will be printed.
Please rename any KAFKACAT_CONF environment variables to KCAT_CONF. The old environment variable will continue to work for some time but a warning will be printed.

kafkacat v1.6.0

Transactional Producer support (see below).
Honour -k <key> when producing files (#197).
Honour -o <offset> in -G high-level consumer mode (#231).
Added -m <seconds> argument to set metadata/query/transaction timeouts.
Allow schema.registry.url to be configured in config file and not only by -r (#220).
Print broker-id message was produced to (if -v), or was consumed from (if -J).

Apache Kafka EOS / Transactional Producer support

Messages can now be produced in a single transaction if -X transactional.id=.. is passed to the producer in -P mode.

If kafkacat is terminated through Ctrl-C (or other signal) the transaction will be aborted, while normal termination (due to stdin closing or after reading all supplied files) will commit the transaction.

$ kafkacat -b $BROKERS -P -t mytopic -X transactional.id=myproducerapp
% Using transactional producer
This is a transactional message
And so is this
:)
[Press Ctrl-D]
% Committing transaction
% Transaction successfully committed

Older releases

See https://github.com/edenhill/kcat/releases