Guozhang Wang created KAFKA-10263:
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Summary: Do not create standbys for those revoking active tasks if
it is not stateful
Key: KAFKA-10263
URL: https://issues.apache.org/jira/browse/KAFKA-10263
Project: Kafka
Issue Type: Improvement
Reporter: Guozhang Wang
Assignee: Guozhang Wang
Today in StreamsPartitionAssignor, if an intended active tasks is not yet
revoked from the old owner we would not give it to the newly assigned owner,
but instead we would assign it as a standby task to the new owner to let it
start restoring a bit early.
However, if that task is not stateful, then there's no point trying to let it
restore at all. This should be avoided in the assignor.
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