Sean Quah created KAFKA-19449:
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Summary: Unexpected UNREVOKED_PARTITIONS to UNRELEASED_PARTITIONS
transition in consumer member reconciliation
Key: KAFKA-19449
URL: https://issues.apache.org/jira/browse/KAFKA-19449
Project: Kafka
Issue Type: Bug
Components: group-coordinator
Reporter: Sean Quah
Assignee: Sean Quah
We transition to `UNRELEASED_PARTITIONS` when advancing to a new target
assignment and partitions in the assignment are "owned" by another member.
Partitions are considered "owned" by another member if they are in a member's
assignment or partitions pending revocation. Ownership is only updated after
reconciliation has finished.
When the latest target assignment includes partitions from the partitions
pending revocation list, we mistakenly think the partitions are owned by
another member and transition from `UNREVOKED_PARTITIONS` to
`UNRELEASED_PARTITIONS` instead.
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