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Posted to jira@kafka.apache.org by "Damian Guy (JIRA)" <ji...@apache.org> on 2017/08/04 14:44:00 UTC

[jira] [Created] (KAFKA-5702) Refactor StreamThread to separate concerns and enable better testability

Damian Guy created KAFKA-5702:
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             Summary: Refactor StreamThread to separate concerns and enable better testability
                 Key: KAFKA-5702
                 URL: https://issues.apache.org/jira/browse/KAFKA-5702
             Project: Kafka
          Issue Type: Improvement
          Components: streams
            Reporter: Damian Guy
            Assignee: Damian Guy


{{StreamThread}} does a lot of stuff, i.e., managing and creating tasks, getting data from consumers, updating standby tasks, punctuating, rebalancing etc. With the current design it is extremely hard to reason about and is quite tightly coupled. 
We need to start to tease out some of the separate concerns from StreamThread, ie, TaskManager, RebalanceListener etc. 



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