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KAFKA-19439; OffsetFetch API does not return group level errors correctly with version 1 for 3.9 #20050

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The OffsetFetch API does not support top level errors in version 1. Hence, the top level error must be returned at the partition level.

Side note: It is a tad annoying that we create error response in multiple places (e.g. KafkaApis, Group CoordinatorService). There were a reason for this but I cannot remember.

Reviewers: Dongnuo Lyu [email protected], Sean Quah [email protected], Ken Huang [email protected], TengYao Chi [email protected]

…ctly with version 1

The OffsetFetch API does not support top level errors in version 1.
Hence, the top level error must be returned at the partition level.

Side note: It is a tad annoying that we create error response in
multiple places (e.g. KafkaApis, Group CoordinatorService). There were a
reason for this but I cannot remember.

Reviewers: Dongnuo Lyu <[email protected]>, Sean Quah <[email protected]>, Ken Huang <[email protected]>, TengYao Chi <[email protected]>
@brandboat brandboat changed the title KAFKA-19246; OffsetFetch API does not return group level errors correctly with version 1 KAFKA-19439; OffsetFetch API does not return group level errors correctly with version 1 for 3.9 Jun 26, 2025
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