Matthias J. Sax created KAFKA-21112:
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Summary: Consider adding a assignment verification step for
"streams" groups
Key: KAFKA-21112
URL: https://issues.apache.org/jira/browse/KAFKA-21112
Project: Kafka
Issue Type: Improvement
Components: group-coordinator, streams
Reporter: Matthias J. Sax
With https://issues.apache.org/jira/browse/KAFKA-20683, "streams" groups now
support custom assignors.
We should consider to add a verification step, that the assignment is correct,
ie, all tasks are assigned, no task was "invented", and no task placement
violations.
This is especially critical, because both the refiner (added for upcoming 4.5
release to plan warmup tasks) and reconciler might "choke" on an invalid
assignment.
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