Javier Holguera created KAFKA-9174:
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Summary: Improve documentation for State Restore lifecycle
Key: KAFKA-9174
URL: https://issues.apache.org/jira/browse/KAFKA-9174
Project: Kafka
Issue Type: Improvement
Components: documentation, streams
Environment: N/A
Reporter: Javier Holguera
This is triggered by a question in the Kafka Users mailing list:
[https://lists.apache.org/thread.html/cc9b2faec61795dba3806c54f8fbace80cdcd2ef65853fe4098934c3@%3Cusers.kafka.apache.org%3E]
The question was what happened with the State Restore listener when a new
partition was assigned, long after the application has started. It wasn't clear
if the state restore listener would be invoked and what state the KafkaStreams
would go into while the restoration for the state of the newly assigned
partition happened.
This ticket is a placeholder to improve the documentation and clarify those two
points:
* What state will the KafkaStreams be in while restoring the state for the
newly assigned partitions
* Will the State Restore listener be called as it would when the state is
restored when the application starts
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