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Current state: Under Discussion

Discussion thread: here

JIRA: KAFKA-7236

Please keep the discussion on the mailing list rather than commenting on the wiki (wiki discussions get unwieldy fast).

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We must pass the default value as a parameter in (2) as `getLogConfigs` `KafkaZkClient.getLogConfigs` will return a default value if the specified configuration is not set in Zookeeper (Kafka default for "min.insync.replicas" is 1).

If the user has configured "min.insync.replicas" on the broker/cluster-level (and not topic-level), then `getLogConfigs` `KafkaZkClient.getLogConfigs` will return the default value of 1 instead of the broker/cluster-level value, so we must make sure it has to pass in the value used by the broker/cluster as the "default" value.

This means we must add an additional flag "--bootstrap-server" to use AdminClient to get the broker/cluster "min.insync.replicas" configuration to use as the default when it is not found in Zookeeper.

Example of using the command:

bin/kafka-topics.sh --zookeeper localhost:2181 --describe --under-min-isr-partitions --bootstrap-server localhost:9092

Compatibility, Deprecation, and Migration Plan

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