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Since the design for atomic writes of source records and their offsets relies on source offsets being stored in a Kafka topic, standalone mode is not eligible. If there is sufficient demand, we may add this capability to standalone mode in the future.

More conservative task fencing

It may not be necessary to fence out all tasks from a previous generation if the division of source partitions among those tasks doesn't change. However, it's impossible to know the actual assignment of source partitions to tasks since there's no API for connectors to be able to provide this information to the Connect framework. An extension to the Connect framework to add this API could be made, but is left for future work. One important question to consider with such an API would be whether it would take into account configuration changes that are invisible to the connector itself, such as converter or transformation chain changes.