HFCP: Hyperledger Fabric Certified PractitionerDemo

By Linux Foundation · Question Mode

QuestionQ40

Fundamentals of Blockchain

What is the sole way to recover after a migration from Kafka to Raft fails?

  • A Retry the migration from Kafka to Raft.
  • B Restore the state from a backup.
  • C Revert to the previous version of Kafka.
  • D Rebuild the network from scratch.
Explanation

A failed Hyperledger Fabric Kafka-to-Raft migration can be recovered only by restoring the ordering nodes, Kafka servers, and ZooKeeper servers to the filesystem backup taken while the system was in maintenance mode. The migration cannot simply be reverted to Kafka after Raft has begun committing transactions.

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