[KAFKA-4092] retention.bytes should not be allowed to be less than segment.bytes - ASF JIRA

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Details

Type: Improvement
Status: Reopened
Priority: Minor
Resolution: Unresolved
Affects Version/s: None
Fix Version/s: None
Component/s: log
Labels:
None

Description

Right now retention.bytes can be as small as the user wants but it doesn't really get acted on for the active segment if retention.bytes is smaller than segment.bytes. We shouldn't allow retention.bytes to be less than segment.bytes and validate that at startup.

Note that a PR for this was merged in 0.10.2.0, but reverted in the 0.10.2 branch (what will become 0.10.2.1) and trunk (see ~~KAFKA-4788~~ for details). This is still worth doing, but the implementation needs to be a bit different: we should warn in TopicConfigHandler and we could potentially warn in KafkaConfig.