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Discussion thread: <link to mailing list DISCUSS thread>

JIRA: KAFKA-5319

Released: 

Motivation

I think kafka need to add a tool to make amounts of replicas and leaders on every brokers balanced.Current kafka server does not provide a function to make cluster balance.When we use console command to create a topic without 'replicaAssignmentOpt' ,kafka server   assigns replicas  by a "replicaAssignment" function . The function spread the replicas evenly among brokers to make cluster balanced.It can not make sure the cluster is balanced.Even though it is balanced,the balanced state will be destroyed.e.g.

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