Jun Rao created KAFKA-428:
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             Summary: need to update leaderAndISR path in ZK conditionally in 
ReplicaManager
                 Key: KAFKA-428
                 URL: https://issues.apache.org/jira/browse/KAFKA-428
             Project: Kafka
          Issue Type: Bug
          Components: core
    Affects Versions: 0.8
            Reporter: Jun Rao
             Fix For: 0.8


When the leader tries to update the leaderAndISR path in ZK, the path may have 
been updated by the controller. When this happens, the leader should abort the 
update and log it. The controller should send new requests to the leader later 
on.

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