Jun Rao created KAFKA-19112:
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Summary: cleanup.policy shouldn't be empty
Key: KAFKA-19112
URL: https://issues.apache.org/jira/browse/KAFKA-19112
Project: Kafka
Issue Type: Bug
Components: core
Reporter: Jun Rao
Currently, we allow a user to set cleanup.policy to be an empty list, which
shouldn't be allowed. A few other configs of List type such as
group.coordinator.rebalance.protocols and process.roles have the same problem.
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