Aljoscha Krettek commented on FLINK-9621:

I think the problem is that we use the same properties for configuring both the 
Flink portion and the connector and the Kafka portion. And Kafka issues 
warnings about the flink-specific settings it doesn't know about.

> Warning when enabling partition discovery
> -----------------------------------------
>                 Key: FLINK-9621
>                 URL: https://issues.apache.org/jira/browse/FLINK-9621
>             Project: Flink
>          Issue Type: Improvement
>          Components: Kafka Connector
>    Affects Versions: 1.5.0
>            Reporter: Olivier Zembri
>            Priority: Minor
> When partition discovery is enabled by setting a non-negative value for 
> {{flink.partition-discovery.interval-millis}} in the properties configuration 
> when creating a new Kafka consumer using FlinkKafkaConsumer011 as described 
> in link
> https://ci.apache.org/projects/flink/flink-docs-release-1.5/dev/connectors/kafka.html
> an unexpected warning is raised at runtime:
> The configuration 'flink.partition-discovery.interval-millis' was supplied 
> but isn't a known config.

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