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Matthias J. Sax commented on KAFKA-8596: ---------------------------------------- Throwing an exception is not possible, because the error occurs on a different thread, ie, not your "main" thread that calls `KafkaStreams#start()`. However, you can register a uncaught exception handler callback as described in the docs: [https://kafka.apache.org/23/documentation/streams/developer-guide/write-streams.html] {code:java} KafkaStreams#setUncaughtExceptionHandler(...) {code} This allows you to get notified about the error in the main thread and you can react to it accordignly. Please let us know if this works for you. I think this ticket should be closed as "not a problem" as the handler should provide the functionality you request. > Kafka topic pre-creation error message needs to be passed to application as > an exception > ---------------------------------------------------------------------------------------- > > Key: KAFKA-8596 > URL: https://issues.apache.org/jira/browse/KAFKA-8596 > Project: Kafka > Issue Type: Improvement > Components: streams > Affects Versions: 2.1.1 > Reporter: Ashish Vyas > Priority: Minor > > If i don't have a topic pre-created, I get an error log that reads "is > unknown yet during rebalance, please make sure they have been pre-created > before starting the Streams application." Ideally I expect an exception here > being thrown that I can catch in my application and decide what I want to do. > > Without this, my app keeps running and actual functionality doesn't work > making it time consuming to debug. I want to stop the application right at > this point. > -- This message was sent by Atlassian JIRA (v7.6.3#76005)