[jira] [Created] (KAFKA-793) Include controllerId in all requests sent by controller

["Swapnil Ghike (JIRA)" <ji...@apache.org>]

Swapnil Ghike created KAFKA-793:
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             Summary: Include controllerId in all requests sent by controller
                 Key: KAFKA-793
                 URL: https://issues.apache.org/jira/browse/KAFKA-793
             Project: Kafka
          Issue Type: Bug
    Affects Versions: 0.8
            Reporter: Swapnil Ghike
            Priority: Blocker
             Fix For: 0.8


As part of KAFKA-513, we added controllerId in LeaderAndIsrRequest. We should add that to all requests sent by the controller, such as StopReplicaRequest.

Other small issues that can be taken care of by this jira:
1. The string "state.change.logger" is used in many places. We should create a constant val and reuse the val to avoid human mistakes.
2. Remove the private constructor from ControllerChannelManager.
3. Remove default from jsonFileOpt in PreferredReplicaLeaderElectionCommand, because the default is only used to indicate an absense of a legitimate jsonFile. We can check the same using if(options.has(jsonFileOpt))



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