A. Sophie Blee-Goldman created KAFKA-12574:
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Summary: Deprecate eos-alpha
Key: KAFKA-12574
URL: https://issues.apache.org/jira/browse/KAFKA-12574
Project: Kafka
Issue Type: Improvement
Components: streams
Reporter: A. Sophie Blee-Goldman
Fix For: 3.0.0
In KIP-447 we introduced a new thread-producer which is capable of exactly-once
semantics across multiple tasks. The new mode of EOS, called eos-beta, is
intended to eventually be the preferred processing mode for EOS as it improves
the performance and scaling of partitions/tasks. The only downside is that it
requires brokers to be on version 2.5+ in order to understand the latest APIs
that are necessary for this thread-producer.
We should consider deprecating the eos-alpha config, ie
StreamsConfig.EXACTLY_ONCE, to encourage new. & existing EOS users to migrate
to the new-and-improved processing mode, and upgrade their brokers if necessary.
Eventually we would like to be able to remove the eos-alpha code paths from
Streams as this will help to simplify the logic and reduce the processing mode
branching. But since this will break client-broker compatibility, and 2.5 is
still a relatively recent version, we probably can't actually remove eos-alpha
in the near future
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