[KAFKA-9741] ConsumerCoordinator must update ConsumerGroupMetadata before calling onPartitionsRevoked()

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 2.5.0
• Fix Version/s: 2.5.0
• Component/s: consumer
• Assignee: Matthias J. Sax
• Reporter: Matthias J. Sax
• Created: 21/Mar/20 01:00
• Updated: 21/Mar/20 04:37
• Resolved: 21/Mar/20 04:37

Description

If partitions are revoked, an application may want to commit the current offsets.

Using transactions, committing offsets would be done via the producer passing in the current `ConsumerGroupMetadata`. If the metadata is not updates before the callback, the call to `commitTransaction(...)` fails as and old generationId would be used.

Issue Links

• links to: GitHub Pull Request #8325