Konstantine Karantasis created KAFKA-13759:
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Summary: Disable producer idempotency by default in producers
instantiated by Connect
Key: KAFKA-13759
URL: https://issues.apache.org/jira/browse/KAFKA-13759
Project: Kafka
Issue Type: Bug
Components: KafkaConnect
Reporter: Konstantine Karantasis
Assignee: Konstantine Karantasis
https://issues.apache.org/jira/browse/KAFKA-7077 was merged recently referring
to KIP-318. Before that in AK 3.0 idempotency was enabled by default across
Kafka producers.
However, some compatibility implications were missed in both cases.
If idempotency is enabled by default Connect won't be able to communicate via
its producers with Kafka brokers older than version 0.11. Perhaps more
importantly, for brokers older than version 2.8 the {{IDEMPOTENT_WRITE}} ACL is
required to be granted to the principal of the Connect worker.
Given the above caveats, this ticket proposes to explicitly disable producer
idempotency in Connect by default. This feature, as it happens today, can be
enabled by setting worker and/or connector properties. However, enabling it by
default should be considered in a major version upgrade and after KIP-318 is
updated to mention the compatibility requirements and gets officially approved.
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