Consumer rebalance.
also: rebalance · rebalances · consumer rebalancing · partition reassignmentReassigning a topic's partitions among a group's consumers when one joins, leaves or crashes, pausing consumption briefly.
the two-minute refresher
- Triggered by a consumer joining, leaving, or missing its heartbeats.
- Consumers stop fetching while partitions move: a short processing pause.
- Uncommitted work on a moved partition is redone by the new owner: duplicates.
- Commit offsets on revoke, and keep processing idempotent.