Jun Rao created KAFKA-420:
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Summary: maintain HW correctly with only 1 replica in ISR
Key: KAFKA-420
URL: https://issues.apache.org/jira/browse/KAFKA-420
Project: Kafka
Issue Type: Bug
Components: core
Affects Versions: 0.8
Reporter: Jun Rao
Currently, the HW maintenance logic is only triggered when handling fetch
requests from the follower. As a result, if the ISR has only 1 replica, the HW
won't be incremented since there is no request from the follower to trigger the
maintenance logic.
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