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LeaderAndIsrRequest v3 adds the topic ID to the topic_states field, and a boolean flag to denote whether this is the initial "full" LeaderAndIsrRequest sent by a controller.

The Currently, the first LeaderAndIsrRequest sent to a broker by a controller contains all TopicPartitions that a broker is a replica for. If. We will formalize this behavior by also including an is_every_partition flag to denote when this is one such request. When is_every_partition = true, the broker can reconcile its local state on disk with the request, and safely stage deletions for any partitions that are present on disk and are not contained in the request. This may include cases where a topic_partition combination TopicPartition is not present in the LeaderAndIsrRequest, or it may be due to a conflicting topic partition , with containing a topic ID that does not match the local topic partition stored on the broker. Such reconciliation may also be necessary if is_every_partition = false, and the topic ID set on a partition does not match the ID contained in the request.

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