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The tool takes a mandatory list of zookeeper hosts and an optional list of topic partitions provided as a json file. If the list is not provided, the tool queries zookeeper and gets all the topic partitions for the cluster. The tool exits after updating the zookeeper path "/admin/preferred_replica_election" with the topic partition list.

Example json file (This is optional. This can be specified to move the leader to the preferred replica for specific topic partitions)

<--Example-->

FAQ

What happens if the preferred replica is not in the ISR?

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