[ https://issues.apache.org/jira/browse/KAFKA-794?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Work on KAFKA-794 started by Neha Narkhede.

> Clean up controller logging
> ---------------------------
>
>                 Key: KAFKA-794
>                 URL: https://issues.apache.org/jira/browse/KAFKA-794
>             Project: Kafka
>          Issue Type: Improvement
>          Components: controller
>    Affects Versions: 0.8
>            Reporter: Neha Narkhede
>            Assignee: Neha Narkhede
>            Priority: Blocker
>              Labels: kafka-0.8, p2
>
> We created the state change log in KAFKA-513 which creates a well formatted log of the lifetime of all state change requests in a Kafka cluster. While troubleshooting KAFKA-790, I looked into server.log, controller.log and state-change.log and realized we can improve the controller logging -
> 1. StopReplica state change is missing from the state-change.log
> 2. Some state change log messages are repeated. These are likely mistakenly inside a for loop rather than outside
> 3. Some controller logging that should be in the controller.log is still in server.log. For example, everything from ReplicaManager. This is useful for troubleshooting but confusing to be inside server.log.

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