Bruno Cadonna created KAFKA-8613:
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Summary: Set default grace period to 0
Key: KAFKA-8613
URL: https://issues.apache.org/jira/browse/KAFKA-8613
Project: Kafka
Issue Type: Improvement
Components: streams
Affects Versions: 3.0.0
Reporter: Bruno Cadonna
Currently, the grace period is set to retention time if the grace period is not
specified explicitly. The reason for setting the default grace period to
retention time was backward compatibility. Topologies that were implemented
before the introduction of the grace period, added late arriving records to a
window as long as the window existed, i.e., as long as its retention time was
not elapsed.
This unintuitive default grace period has already caused confusion among users.
For the next major release, we should set the default grace period to
{{Duration.ZERO}}.
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