Status

Current state: Under ACCEPTED

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Previous Discussion thread: here

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JIRA: KAFKA-7236
Please

keep the discussion on the mailing list rather than commenting on the wiki (wiki discussions get unwieldy fast).PR: https://github.com/apache/kafka/pull/6224

Motivation

The "min.insync.replicas" configuration specifies the minimum number of insync replicas required for a partition to accept messages from the producer. If the insync replica count of a partition falls under the specified "min.insync.replicas", then the broker will reject messages for producers using acks=all. These producers will suffer unavailability as they will see a NotEnoughReplicas or NotEnoughReplicasAfterAppend exception.

...

This means we need an additional flag "--bootstrap-server" to use AdminClient. KIP-377: TopicCommand to use AdminClient is already proposing a change to use AdminClient and introduce a "--bootstrap-server" option, so we can leverage the changes in KIP-377 for this KIP.

NOTE: This option is not supported with the deprecated "--zookeeper" option.

Compatibility, Deprecation, and Migration Plan

As this change adds a new option instead of modifying existing ones, there will not be any compatibility issues or a migrationSince we rely on AdminClient for the computed "min.insync.replicas" configuration, this new option CANNOT be used with the deprecated "--zookeeper" option.

Rejected Alternatives

None so far.