Boyang Chen created KAFKA-9112:
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Summary: Combine streams `onAssignment` with `partitionsAssigned`
task creation
Key: KAFKA-9112
URL: https://issues.apache.org/jira/browse/KAFKA-9112
Project: Kafka
Issue Type: Improvement
Reporter: Boyang Chen
Task manager needs to call `createTasks` inside partitionsAssigned callback,
which is after the `onAssignment` callback for assignor. This means during task
creation we rely on the status change based on the intermediate data structures
populated by a different callback, which is hard to reason about. We should
consider consolidate logics to either one of the callbacks, prefer
`onAssignment` as it contains full information needed.
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