David Jacot created KAFKA-14255: ----------------------------------- Summary: Fetching from follower should be disallowed if fetch from follower is disabled Key: KAFKA-14255 URL: https://issues.apache.org/jira/browse/KAFKA-14255 Project: Kafka Issue Type: Bug Affects Versions: 2.4.0 Reporter: David Jacot Assignee: David Jacot
There are clients out there that have implemented KIP-392 (Fetch From Follower) and thus use FetchRequest >= 11. However, they have not implemented KIP-320 which add the leader epoch to the FetchRequest in version 9. Without KIP-320, it is not safe to fetch from the follower. If a client does it by mistake – e.g. based on stale metadata – that could lead to offset out of range. -- This message was sent by Atlassian Jira (v8.20.10#820010)