Ryan Berdeen created KAFKA-1653:
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             Summary: Duplicate broker ids allowed in replica assignment
                 Key: KAFKA-1653
                 URL: https://issues.apache.org/jira/browse/KAFKA-1653
             Project: Kafka
          Issue Type: Bug
          Components: tools
    Affects Versions: 0.8.1.1
            Reporter: Ryan Berdeen


The reassign partitions command and the controller do not ensure that all 
replicas for a partition are on different brokers. For example, you could set 
1,2,2 as the list of brokers for the replicas.

kafka-topics.sh --describe --under-replicated will list these partitions as 
under-replicated, but I can't see a reason why the controller should allow this 
state.



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