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The bootstrap.checkpoint file is created by the kafka-storage tool. This file will be deprecated in a 4.x release and removed for existing clusters in the 5.0 release. The kafka-storage tool will not create this file any more and will instead write metadata record to the zero checkpoint in the cluster metadata partition.

The Kafka node will delete the bootstrap checkpoint if it is not needed. The checkpoint is not needed if the bootstrapping metadata has been committed to the cluster metadata partition. One implementation is for the node to delete the bootstrap checkpoint if it has loaded a non-empty checkpoint from the cluster metadata partition.

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