[jira] [Commented] (KAFKA-8596) Kafka topic pre-creation error message needs to be passed to application as an exception

["Matthias J. Sax (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/KAFKA-8596?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16872528#comment-16872528 ] 

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.
>  



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