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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