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• Binary log format

  • No changes expected

• The network protocol and api behavior

  • No changes expected

• Any class in the public packages under clientsConfiguration, especially client configuration

  • org/apache/kafka/common/serialization

    • No changes expected

  • org/apache/kafka/common

    • No changes expected

  • org/apache/kafka/common/errors

    • InvalidNamespaceException will be added to indicate the namespace user is trying to use does not exist.

  • org/apache/kafka/clients/producer

    • No changes expected

  • org/apache/kafka/clients/consumer (eventually, once stable)

    • No changes expected

• Monitoring

• Command line tools and arguments

  • Add create, list and delete for namespaces to kafka-topics and AdminUtils.

  • An optional "namespace" argument will be added to kafka-topics, kafka-configs and kafka-configsacls. If namespace argument is not provided, a default namespace of "" will be used. This will help in keeping the current behavior of Kafka and cli tools intact.

• Anything else that will likely break existing users in some way when they upgrade
  • None

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