Jason Gustafson created KAFKA-7567:
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Summary: Clean up internal metadata usage for consistency and
extensibility
Key: KAFKA-7567
URL: https://issues.apache.org/jira/browse/KAFKA-7567
Project: Kafka
Issue Type: Improvement
Reporter: Jason Gustafson
Assignee: Jason Gustafson
This refactor has two objectives to improve metadata handling logic and testing:
1. We want to reduce dependence on the public object `Cluster` for internal
metadata propagation since it is not easy to evolve. As an example, we need to
propagate leader epochs from the metadata response to `Metadata`, but it is not
straightforward to do this without exposing it in `PartitionInfo` since that is
what `Cluster` uses internally. By doing this change, we are able to remove
some redundant `Cluster` building logic.
2. We want to make the metadata handling in `MockClient` simpler and more
consistent. Currently we have mix of metadata update mechanisms which are
internally inconsistent with each other and also do not match the
implementation in `NetworkClient`.
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