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https://issues.apache.org/jira/browse/KAFKA-9335?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17007101#comment-17007101
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Boyang Chen commented on KAFKA-9335:
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Thanks for the report [~nitay.k]. Could you be more specific about the
reproducing process, for example:
# Does this reproduce on local env?
# How many topic partitions we need to configure for each input and output
topic?
# Do we need data flowing into the input topic when running this example?
# Does this only fail for 2.3.1 -> 2.4 upgrade? At least, does 2.2 and 2.3
could also reproduce issue with this example?
> java.lang.IllegalArgumentException: Number of partitions must be at least 1.
> ----------------------------------------------------------------------------
>
> Key: KAFKA-9335
> URL: https://issues.apache.org/jira/browse/KAFKA-9335
> Project: Kafka
> Issue Type: Bug
> Components: streams
> Affects Versions: 2.4.0
> Reporter: Nitay Kufert
> Priority: Major
> Labels: bug
>
> Hey,
> When trying to upgrade our Kafka streams client to 2.4.0 (from 2.3.1) we
> encountered the following exception:
> {code:java}
> java.lang.IllegalArgumentException: Number of partitions must be at least 1.
> {code}
> It's important to notice that the exact same code works just fine at 2.3.1.
>
> I have created a "toy" example which reproduces this exception:
> [https://gist.github.com/nitayk/50da33b7bcce19ad0a7f8244d309cb8f]
> and I would love to get some insight regarding why its happening / ways to
> get around it
>
> Thanks
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