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https://issues.apache.org/jira/browse/KAFKA-10355?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Bruno Cadonna closed KAFKA-10355.
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> Handle accidental deletion of source-topics as exceptional failure
> ------------------------------------------------------------------
>
> Key: KAFKA-10355
> URL: https://issues.apache.org/jira/browse/KAFKA-10355
> Project: Kafka
> Issue Type: Improvement
> Components: streams
> Reporter: Guozhang Wang
> Assignee: Bruno Cadonna
> Priority: Major
> Fix For: 2.7.0
>
>
> Today when source topics are accidently deleted (either before the Streams
> app is started or while app is already running), the consumer group leader
> would notice from the metadata refresh that this topic is missing, and then
> will re-trigger the rebalance. During the rebalance the leader then would
> encode a `INCOMPLETE_SOURCE_TOPIC_METADATA` in the assignment to let all
> threads to shutdown upon getting the error.
> However, this shutdown process is a *graceful* shutdown and would only print
> an ERROR log entry "Received error code INCOMPLETE_SOURCE_TOPIC_METADATA -
> shutdown". That means users would not be programmatically notified when this
> happens. We should handle it not as a graceful shutdown but as a Shutdown a
> Kafka Streams Application error case which would trigger user's error handler
> with appropriate error reported.
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