[KAFKA-14744] NPE while converting OffsetFetch from version < 8 to version >= 8

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.5.0
• Fix Version/s: 3.5.0
• Assignee: David Jacot
• Reporter: David Jacot
• Created: 23/Feb/23 12:21
• Updated: 23/Feb/23 17:32
• Resolved: 23/Feb/23 17:32

Description

While refactoring the OffsetFetch handling in KafkaApis, we introduced a NullPointerException (NPE). The NPE arises when the FetchOffset API is called with a client using a version older than version 8 and using null for the topics to signal that all topic-partition offsets must be returned. This means that this bug mainly impacts admin tools. The consumer does not use null.

This NPE is here: https://github.com/apache/kafka/commit/24a86423e9907b751d98fddc7196332feea2b48d#diff-0f2f19fd03e2fc5aa9618c607b432ea72e5aaa53866f07444269f38cb537f3feR237.

We missed this during the refactor because we had no tests in place to test this mode.

Issue Links

• links to: GitHub Pull Request #13295