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Posted to jira@kafka.apache.org by "Guozhang Wang (Jira)" <ji...@apache.org> on 2020/02/26 20:11:00 UTC

[jira] [Created] (KAFKA-9614) Avoid initializing the topology twice when resuming stream tasks from suspended state

Guozhang Wang created KAFKA-9614:
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             Summary: Avoid initializing the topology twice when resuming stream tasks from suspended state
                 Key: KAFKA-9614
                 URL: https://issues.apache.org/jira/browse/KAFKA-9614
             Project: Kafka
          Issue Type: Bug
          Components: streams
            Reporter: Guozhang Wang
            Assignee: Guozhang Wang


When resuming from a suspended stream task, today it first transit to restoring and then to running. The main motivation is to simplify the state transition FSM of stream tasks. We should only call `initializeTopology` when transiting from restoring to running, but the tech debt cleanup missed one gap that beforehand we transit to running directly and hence also call `initializeTopology` at the first transition.



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